Biodegradable mulching film formula optimization method and system

Abstract

The invention discloses a biodegradable mulching film formula optimization method and system, and relates to the technical field of agriculture. The method comprises the following steps: acquiring a soil humidity value in real time in an agricultural period, and calculating a soil humidity change rate; when in the rising trend, the value is greater than or equal to the high-humidity impact critical value; starting high-humidity impact condition timing until the time is lower than a high-humidity impact critical value; when the absolute value is larger than or equal to the rapid drying critical value in the descending trend, rapid drying situation timing is started till the absolute value is lower than the rapid drying critical value; counting a first time length of a high-humidity impact condition and a second time length of a rapid drying condition in an agricultural period; and adjusting the standard mulching film formula according to the first duration and the second duration. According to the formula optimization method and system for the biodegradable mulching film, the adaptability and reliability of the biodegradable mulching film are remarkably improved, it is ensured that the biodegradable mulching film keeps necessary strength and integrity in the crop growth period, degradation is achieved after a specific time point, the agricultural production requirement is better met, and environmental pollution is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural technology, and in particular to a biodegradable mulch film formula optimization method and system. BACKGROUND

[0002] Biodegradable mulch film can naturally decompose after use, effectively reducing environmental pollution and farmland residues, and is gradually replacing traditional plastic mulch. To ensure that it maintains sufficient strength and integrity during the critical period of crop growth, and effectively degrades after crop harvesting or at a specific time point, its formula needs to be precisely adjusted according to the specific farmland environment.

[0003] Currently, the common formula optimization method relies on external environmental information such as soil humidity, surface temperature, and light duration to guide the proportion adjustment of components such as high molecular materials, plasticizers, and degradation promoters in the mulch formula. However, some existing mulch formula optimization systems face serious technical challenges when dealing with non-steady-state environmental information brought about by specific agricultural activities. For example, in a certain national biodegradable mulch formula optimization project, the formula optimization system of the central laboratory is connected to dozens of cooperative farmland monitoring networks in different climate zones and soil types. The monitoring points continuously collect and transmit environmental information, and the system outputs optimization formula recommendations based on built-in rules after analysis.

[0004] The system performs well in stable environmental areas, but problems arise in a hilly cooperative farmland. Due to the planting of special economic crops, the "pulse" drip irrigation system is used, resulting in soil humidity data showing a sharp peak-valley feature. The system's data processing module performs periodic averaging on these data, eliminating the true environmental rhythm, and mistakenly judging it as "mild environment and moderate humidity", and then recommending a standard formula for a medium humidity environment.

[0005] The mulch produced according to this formula has a rapid increase in degradation promoter activity during high humidity, and the mechanical properties quickly decrease; during the dry period, the mulch becomes brittle and fragmented, forming plastic residues that cannot be recycled and are difficult to degrade, causing new field pollution.

[0006] In view of the above problems, the existing technology needs to be improved. SUMMARY

[0007] The present application discloses a biodegradable mulch film formula optimization method and system, aiming to solve the serious technical challenges faced by existing mulch formula optimization systems when dealing with non-steady-state environmental information brought about by specific agricultural activities.

[0008] The technical solution of the present application is as follows:

[0009] In a first aspect, the present application discloses a biodegradable mulch film formula optimization method, comprising:

[0010] In a preset agricultural cycle, the soil humidity value of the soil paved with the reference mulch is acquired in real time, and the humidity change rate of the soil is calculated in real time;

[0011] When the soil humidity shows an upward trend, and the current humidity change rate of the soil is greater than or equal to a preset high-humidity impact threshold, a timer is started to time the high-humidity impact situation of the soil until the humidity change rate is lower than the high-humidity impact threshold;

[0012] When the soil humidity shows a downward trend, and the absolute value of the current humidity change rate of the soil is greater than or equal to a preset rapid drying threshold, a timer is started to time the rapid drying situation of the soil until the absolute value of the humidity change rate is lower than the rapid drying threshold;

[0013] The first duration of the high-humidity impact situation of the soil and the second duration of the rapid drying situation of the soil in the agricultural cycle are counted;

[0014] According to the first duration and the second duration, the preset reference mulch formula is adjusted to generate an optimized biodegradable mulch formula.

[0015] Through the technical solution, the influence of non-steady-state environmental events such as high-humidity impact and rapid drying on the mulch can be identified and quantified by monitoring the soil humidity change rate in real time, thereby providing a more accurate basis for mulch formula adjustment, effectively solving the problem of insufficient processing of non-steady-state environmental information in the prior art, and enabling the mulch formula to better adapt to the actual farmland environment.

[0016] Further, the step of adjusting the preset reference mulch formula according to the first duration and the second duration to generate an optimized biodegradable mulch formula specifically includes:

[0017] The first duration is compared with a preset high-humidity impact time threshold;

[0018] When the first duration is greater than the high-humidity impact time threshold, the content of the degradation promoter in the reference mulch formula is adjusted according to a preset degradation promoter adjustment rule;

[0019] The second duration is compared with a preset rapid drying time threshold;

[0020] When the second duration is greater than the rapid drying time threshold, the content of the plasticizer and / or anti-cracking agent in the reference mulch formula is adjusted according to a preset plasticizer and / or anti-cracking agent adjustment rule;

[0021] According to the adjustment of the content of the degradation promoter in the benchmark mulch formula, and the adjustment of the content of the plasticizer and / or the anti-brittle agent in the benchmark mulch formula, the other components in the benchmark mulch formula are adaptively adjusted to generate the biodegradable mulch optimized formula.

[0022] Through the technical solution, the quantified environmental stress duration can be directly associated with the adjustment of the key components of the mulch (such as the degradation promoter, the plasticizer and / or the anti-brittle agent), a specific adjustment strategy is formed, the formula optimization process is more systematic and operable, and more refined performance regulation of the mulch is realized.

[0023] More specifically, the degradation promoter adjustment rule is that, in one agricultural cycle, for the time when the first duration exceeds the high-humidity impact time threshold, a set content is reduced from the content of the degradation promoter in the benchmark mulch formula for each set time that exceeds the threshold.

[0024] The plasticizer and / or anti-brittle agent adjustment rule is that, in one agricultural cycle, for the time when the second duration exceeds the rapid drying time threshold, a first set content is added to the content of the plasticizer and / or anti-brittle agent in the benchmark mulch formula for each first set time that exceeds the threshold.

[0025] Through the technical solution, specific and quantifiable adjustment parameters and ranges can be provided, the formula adjustment has a clear guidance basis, the accuracy and effectiveness of the adjustment are ensured, and the performance stability of the mulch under complex environments is further improved.

[0026] In some preferred embodiments, based on any of the above methods, after the timer ends counting the time when the soil is in the high-humidity impact situation, the method further comprises:

[0027] Real-time acquisition of the temperature under the benchmark mulch and the ambient temperature;

[0028] According to a preset normal correlation rule between the temperature under the benchmark mulch and the ambient temperature, it is judged whether the current temperature under the benchmark mulch is in an abnormal downward trend;

[0029] If the current temperature under the benchmark mulch is in an abnormal downward trend, it is determined that the lower surface of the mulch is in a wet situation, and a timer starts counting the time when the lower surface of the mulch is in the wet situation until the temperature under the mulch returns to normal.

[0030] The step of counting the first duration when the soil is in the high-humidity impact situation and the second duration when the soil is in the rapid drying situation in the agricultural cycle specifically comprises:

[0031] The first duration when the soil is in the high-humidity impact situation, the second duration when the soil is in the rapid drying situation, and the third duration when the lower surface of the mulch is in the wet situation in the agricultural cycle are counted.

[0032] The step of adjusting the preset reference mulch formula according to the first duration and the second duration to generate the biodegradable mulch optimized formula specifically includes:

[0033] The step of adjusting the preset reference mulch formula according to the first duration, the second duration and the third duration to generate the biodegradable mulch optimized formula.

[0034] Through the technical solution, the judgment of the mulch lower surface wetting condition can be introduced, and the duration is included in the statistics, so that the wetting stress borne by the mulch is more comprehensively evaluated, the deficiency of only considering the change of soil humidity is made up, and the formula optimization can more accurately cope with the microenvironment actually encountered by the mulch.

[0035] Preferably, the method further includes:

[0036] In the steady state environment without humidification operation, the temperature below the mulch and the ambient temperature are continuously acquired; and according to the continuously acquired temperature below the mulch and the ambient temperature, the normal correlation between the temperature below the mulch and the ambient temperature is established;

[0037] The abnormal downward trend of the reference temperature below the mulch is that the ambient temperature remains unchanged or continuously rises within the second set time, and the reference temperature below the mulch decreases by a set number within the second set time;

[0038] Through the technical solution, a specific method for establishing the normal correlation between the temperature below the mulch and the ambient temperature can be provided, and the judgment standard for the abnormal downward trend of the temperature below the mulch is clearly defined, so that the recognition of the mulch lower surface wetting condition is more objective and reliable, and the accuracy of the environmental evaluation is further improved.

[0039] On the basis of the above, the step of adjusting the preset reference mulch formula according to the first duration, the second duration and the third duration to generate the biodegradable mulch optimized formula specifically includes:

[0040] According to the first duration and the third duration, the wetting degradation stress borne by the reference mulch is evaluated; and according to the wetting degradation stress, the content of the degradation promoter in the reference mulch formula is adjusted;

[0041] The second duration is compared with a preset rapid drying time threshold;

[0042] When the second duration is greater than the rapid drying time threshold, the content of the plasticizer and / or the anti-brittle agent in the reference mulch formula is adjusted according to a preset plasticizer and / or anti-brittle agent adjustment rule;

[0043] According to the adjustment of the content of the degradation promoter in the benchmark mulch formula, and the adjustment of the content of the plasticizer and / or the anti-brittle agent in the benchmark mulch formula, the other components in the benchmark mulch formula are adaptively adjusted to generate the biodegradable mulch optimized formula.

[0044] Through the technical solution, the surface wetting duration (third duration) of the mulch and the high-humidity impact duration (first duration) are combined, the wetting degradation stress of the mulch is more comprehensively evaluated, the content of the degradation promoter is more reasonably adjusted, and the degradation performance of the mulch under complex wetting conditions is more in line with expectations.

[0045] In a second aspect, the application further discloses a biodegradable mulch formula optimization system, comprising:

[0046] The acquisition module is configured to acquire, in real time, a soil humidity value of the soil on which the benchmark mulch is laid in a preset agricultural cycle, and calculate a humidity change rate of the soil in real time;

[0047] The timing module is configured to start a timer to time when the soil humidity shows an upward trend and the current humidity change rate of the soil is greater than or equal to a preset high-humidity impact threshold, until the humidity change rate is lower than the high-humidity impact threshold.

[0048] The first timing module is configured to start a timer to time when the soil humidity shows a downward trend and the absolute value of the current humidity change rate of the soil is greater than or equal to a preset rapid drying threshold, until the absolute value of the humidity change rate is lower than the rapid drying threshold.

[0049] The statistical module is configured to count a first duration during which the soil is in the high-humidity impact state and a second duration during which the soil is in the rapid drying state in the agricultural cycle.

[0050] The generation module is configured to adjust the preset benchmark mulch formula according to the first duration and the second duration, and generate a biodegradable mulch optimized formula.

[0051] Through the technical solution, a system for implementing the biodegradable mulch formula optimization method is provided, and the method can be automatically and efficiently executed through the modular design, and the convenience and practicability of the formula optimization are improved.

[0052] In a third aspect, in another embodiment, the application further discloses a biodegradable mulch formula optimization method, comprising:

[0053] In a preset agricultural cycle, a soil humidity value of the soil on which the benchmark mulch is laid is acquired in real time, and a humidity change rate of the soil is calculated in real time; and the sound wave propagation speed of the benchmark mulch is periodically acquired at a set time interval.

[0054] When the soil humidity is in an upward trend, and the current soil humidity change rate is greater than or equal to a preset high humidity impact threshold value, a timer is started to time the soil in a high humidity impact situation until the humidity change rate is lower than the high humidity impact threshold value;

[0055] When the soil humidity is in a downward trend, and the absolute value of the current soil humidity change rate is less than a preset slow drying threshold value, a timer is started to time the soil in a stable high humidity situation until the humidity value is lower than a preset high humidity threshold value;

[0056] When the acoustic wave transmission speed is in an upward trend, it is determined whether the acoustic wave propagation speed exceeds a preset brittle risk threshold value, and if so, a timer is started to time the mulch in a brittle risk situation until the acoustic wave transmission speed is no longer rising;

[0057] The length of time A that the soil is in a high humidity impact situation, the length of time B that the soil is in a stable high humidity situation, and the length of time C that the mulch is in a brittle risk situation are counted during the agricultural cycle;

[0058] The content of the degradation promoter in the preset reference mulch formula is adjusted according to the length of time A and the length of time B, and the content of the plasticizer and / or anti-brittle agent in the preset reference mulch formula is adjusted according to the length of time C, to generate an optimized formula for biodegradable mulch.

[0059] Through the technical solution, the acoustic wave propagation speed of the mulch can be introduced as an index for directly judging the brittle risk of the mulch, and the soil high humidity impact and stable high humidity situation are combined to more comprehensively and directly evaluate the degradation and brittle state of the mulch, thereby realizing more accurate and forward-looking formula optimization, and effectively avoiding the problems of premature brittle cracking or insufficient degradation of the mulch.

[0060] Further, the step of adjusting the content of the degradation promoter in the preset reference mulch formula according to the length of time A and the length of time B, and adjusting the content of the plasticizer and / or anti-brittle agent in the preset reference mulch formula according to the length of time C, to generate an optimized formula for biodegradable mulch specifically includes:

[0061] According to the length of time A and the length of time B, the first wet degradation stress that the reference mulch needs to withstand is evaluated, and the content of the degradation promoter in the reference mulch formula is adjusted according to the first wet degradation stress;

[0062] The length of time C is compared with a preset brittle risk time threshold value;

[0063] When the length of time C is greater than the brittle risk time threshold value, the content of the plasticizer and / or anti-brittle agent in the reference mulch formula is adjusted according to a preset first plasticizer and / or anti-brittle agent adjustment rule;

[0064] According to the adjustment of the content of the degradation promoter in the reference mulch formula, and the adjustment of the content of the plasticizer and / or the anti-brittleness agent in the reference mulch formula, the other components in the reference mulch formula are adaptively adjusted to generate a biodegradable mulch optimized formula;

[0065] The first plasticizer and / or anti-brittleness agent adjustment rule is that, in an agricultural cycle, for each time that the time length C exceeds the brittle risk time threshold, a third set time is exceeded, and the content of the plasticizer and / or the anti-brittleness agent in the reference mulch formula is increased by a second set content.

[0066] By the technical solution, brittle risk assessment based on sound wave propagation speed and corresponding plasticizer / anti-brittleness agent adjustment rules can be provided, so that the anti-brittleness performance of the mulch can be dynamically adjusted according to the actual brittle risk, thereby effectively prolonging the service life of the mulch while ensuring its timely degradation.

[0067] In a fourth aspect, as an optional solution, the present application further discloses a biodegradable mulch formula optimization system, comprising:

[0068] The first acquisition module is configured to acquire, in a preset agricultural cycle, a soil humidity value of the soil on which the reference mulch is laid in real time, and calculate a humidity change rate of the soil in real time; and periodically acquire a sound wave propagation speed of the reference mulch at a set time interval.

[0069] The second timing module is configured to start a timer to time when the soil humidity shows an upward trend and the current humidity change rate of the soil is greater than or equal to a preset high humidity impact critical value, until the humidity change rate is lower than the high humidity impact critical value.

[0070] The third timing module is configured to start a timer to time when the soil humidity shows a downward trend and the absolute value of the current humidity change rate of the soil is less than a preset slow drying critical value, until the humidity value is lower than a preset high humidity critical value.

[0071] The fourth timing module is configured to determine whether the sound wave propagation speed exceeds a preset brittle risk critical threshold value when the sound wave transmission speed shows an upward trend, and start a timer to time when the mulch is in a brittle risk situation until the sound wave transmission speed no longer shows an upward trend.

[0072] The first statistical module is configured to statistically determine a time length A of the soil in a high humidity impact situation, a time length B of the soil in a stable high humidity situation, and a time length C of the mulch in a brittle risk situation in the agricultural cycle.

[0073] The first generation module is configured to adjust the content of the degradation accelerator in the preset reference mulch film formula according to the time length A and the time length B, and to adjust the content of the plasticizer and / or the anti-brittle agent in the preset reference mulch film formula according to the time length C, thereby generating an optimized formula of the biodegradable mulch film.

[0074] By the technical solution, a system for implementing the above-mentioned method for optimizing the formula of the biodegradable mulch film based on the sound wave propagation speed is provided, and through the integration of sound wave monitoring and multiple environmental factor analysis, dynamic regulation of the performance of the mulch film is made possible, and the intelligentization and precision level of the formula optimization are further improved.

[0075] Advantages

[0076] In the present application, the soil humidity value of the soil on which the reference mulch film is laid is obtained in real time within a preset agricultural cycle, and the humidity change rate of the soil is calculated in real time, so that the environmental changes can be dynamically captured. When the soil humidity shows an upward trend and the humidity change rate reaches or exceeds a preset high-humidity impact critical value, the system starts a timer to record the time length during which the soil is in a high-humidity impact situation. When the soil humidity shows a downward trend and the absolute value of the humidity change rate reaches or exceeds a preset rapid drying critical value, the system starts a timer to record the time length during which the soil is in a rapid drying situation. In this way, the present application can accurately quantify the wet degradation stress (high-humidity impact) and the physical performance stress (brittle risk caused by rapid drying) that the mulch film bears in the non-steady-state environment.

[0077] Based on the statistics of the time lengths of these non-steady-state environmental events, the present application can make targeted adjustments to the preset reference mulch film formula to generate an optimized formula of the biodegradable mulch film. For example, if the time length of the high-humidity impact is too long, it may mean that the mulch film degrades too quickly, in which case the content of the degradation accelerator can be adjusted accordingly; if the time length of the rapid drying is too long, it may cause the mulch film to brittle too early, in which case the content of the plasticizer and / or the anti-brittle agent can be adjusted.

[0078] Through the above technical solution, the present application effectively solves the problem in the prior art that the influence of non-steady-state environmental information on the performance of the mulch film cannot be accurately identified and quantified. The method can make the formula of the biodegradable mulch film more suitable for the dynamic changes of the actual farmland environment, avoiding the problems of premature degradation or late degradation of the mulch film caused by environmental mutations, and brittle in the critical period of crop growth. Therefore, the present application can significantly improve the adaptability and reliability of the biodegradable mulch film, ensure that it maintains the necessary strength and integrity during the crop growth period, and achieves effective degradation after the crops are harvested or at a specific time point, thereby better meeting the needs of agricultural production and further reducing environmental pollution and farmland residues, and has significant excellent technical effects. BRIEF DESCRIPTION OF DRAWINGS

[0079] Figure 1A flowchart of a biodegradable mulch film formula optimization method provided in the present application.

[0080] Figure 2 A structural diagram of a biodegradable mulch film formula optimization system provided in the present application.

[0081] Figure 3 A structural diagram of another biodegradable mulch film formula optimization system provided in the present application.

[0082] Figure 2 In the figure, 1 is an acquisition module, 2 is a timing module, 3 is a first timing module, 4 is a statistical module, and 5 is a generation module.

[0083] Figure 3 In the figure, 11 is a first acquisition module, 12 is a second timing module, 13 is a third timing module, 14 is a fourth timing module, 15 is a first statistical module, and 16 is a first generation module. DETAILED DESCRIPTION

[0084] The technical solutions in the present application will be clearly and completely described below with reference to the accompanying drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments.

[0085] Referring to Figure 1 The present application provides a biodegradable mulch film formula optimization method, which comprises the following steps.

[0086] S110, acquiring, in real time, a soil humidity value of soil on which a reference mulch film is laid in a preset agricultural cycle, and calculating a humidity change rate of the soil in real time;

[0087] S120, when the soil humidity shows an upward trend and the current humidity change rate of the soil is greater than or equal to a preset high-humidity impact critical value, starting a timer to time the high-humidity impact situation of the soil, until the humidity change rate is lower than the high-humidity impact critical value;

[0088] S130, when the soil humidity shows a downward trend and the absolute value of the current humidity change rate of the soil is greater than or equal to a preset rapid drying critical value, starting a timer to time the rapid drying situation of the soil, until the absolute value of the humidity change rate is lower than the rapid drying critical value;

[0089] S140, counting a first duration of the high-humidity impact situation of the soil and a second duration of the rapid drying situation of the soil in the agricultural cycle;

[0090] S150, adjusting a preset reference mulch film formula according to the first duration and the second duration, and generating an optimized formula of biodegradable mulch film.

[0091] The present application can more accurately evaluate the actual environmental stress that the mulch film bears by real-time monitoring of the soil moisture change rate and accurate statistics of the duration of specific environmental events, thereby achieving precise optimization of the mulch film formula and effectively improving the adaptability and performance of biodegradable mulch film in complex farmland environments.

[0092] To better understand the biodegradable mulch film formula optimization method proposed in the present application, some key terms and implementation environments involved will be explained below.

[0093] The "preset agronomic cycle" in the present application refers to the irrigation cycle, the interval between the starting time points of two adjacent irrigation operations.

[0094] The "reference mulch film" refers to the biodegradable mulch film formula used as a reference or starting point before formula optimization. This formula is usually determined based on general standards or preliminary test results.

[0095] The "soil moisture value" refers to the water content in the soil, usually expressed as a percentage by volume or weight.

[0096] The "moisture change rate" refers to the speed at which the soil moisture value changes over time, for example, the percentage change in moisture value per minute.

[0097] The "high-moisture impact threshold" and "rapid drying threshold" are preset thresholds used to determine whether the soil moisture change has reached a level sufficient to significantly affect the performance of the mulch film. These thresholds are pre-set based on the properties of the mulch film material and agronomic needs.

[0098] The "degradation accelerator" is a substance added to the biodegradable mulch film formula to accelerate the decomposition process of the mulch film under specific environmental conditions.

[0099] The "plasticizer" is a substance added to the mulch film formula to increase its flexibility, reduce brittleness, make it easier to process and use, and improve its resistance to brittle cracking in dry environments.

[0100] The "brittle cracking resistance agent" is a substance added to the mulch film formula to improve its brittle cracking resistance under aging or dry conditions, preventing the mulch film from breaking due to brittleness during use.

[0101] The biodegradable mulch film formula optimization method proposed in the present application can include the following steps:

[0102] In a preset agricultural cycle, the soil humidity value of the soil where the reference mulch is laid is acquired in real time, and the humidity change rate of the soil is calculated in real time. For example, a plurality of soil humidity sensors can be arranged in the farmland area where the reference mulch is laid. These sensors can periodically collect soil humidity data and transmit the data to the data processing unit. After the data processing unit receives the continuous soil humidity values, the humidity change rate can be calculated according to the humidity difference between adjacent time points divided by the time interval.

[0103] When the soil humidity shows an upward trend, and the current humidity change rate of the soil is greater than or equal to a preset high-humidity impact threshold, a timer is started to count the time when the soil is in a high-humidity impact situation until the humidity change rate is lower than the high-humidity impact threshold. For example, the data processing unit can continuously monitor the calculated humidity change rate. Once it is detected that the humidity value continues to rise (i.e., the humidity change rate is positive), and the positive value reaches or exceeds the preset high-humidity impact threshold (e.g., 3% per minute), an internal timer is activated and starts to accumulate time. The timer will continue to run until the humidity change rate falls below the high-humidity impact threshold, at which time the timer pauses or stops accumulating. The high-humidity impact threshold can be set according to the hydrolysis resistance of different mulch materials and the rainfall intensity characteristics of the local area, and its value range can be 2% per minute to 8% per minute.

[0104] When the soil humidity shows a downward trend, and the absolute value of the current humidity change rate of the soil is greater than or equal to a preset rapid drying threshold, a timer is started to count the time when the soil is in a rapid drying situation until the absolute value of the humidity change rate is lower than the rapid drying threshold. For example, when the data processing unit detects that the humidity value continues to decrease (i.e., the humidity change rate is negative), and its absolute value reaches or exceeds the preset rapid drying threshold (e.g., 2% per minute), another internal timer is activated and starts to accumulate time. The timer will continue to run until the absolute value of the humidity change rate falls below the rapid drying threshold, at which time the timer pauses or stops accumulating. The rapid drying threshold can be set according to the anti-cracking performance of different mulch materials and the evaporation intensity characteristics of the local area, and its value range can be 1% per minute to 5% per minute.

[0105] The first duration of time when the soil is in a high-humidity impact situation and the second duration of time when the soil is in a rapid drying situation are counted in the agricultural cycle. For example, at the end of the entire agricultural cycle, the total duration of time accumulated by each of the two timers can be read. The first duration of time represents the total time the soil is in a high-humidity impact state, and the second duration of time represents the total time the soil is in a rapid drying state. These duration data can be stored in a database for use in subsequent formula adjustment steps.

[0106] According to the first time length and the second time length, a preset reference mulch film formula is adjusted to generate a biodegradable mulch film optimized formula. For example, a formula adjustment model or rule base based on the first time length and the second time length can be established in advance. According to the first time length and the second time length, the model or rule base can preliminarily qualitatively or quantitatively adjust the content of key components (such as the content of degradation promoters, plasticizers, and / or anti-cracking agents) in the reference mulch film formula. For example, if the first time length is longer, the formula may need to be adjusted to reduce the degradation rate of the mulch film; if the second time length is longer, the formula may need to be adjusted to improve the flexibility and anti-cracking property of the mulch film. Ultimately, through these adjustments, a biodegradable mulch film optimized formula that is more suitable for the specific agricultural cycle environment is generated.

[0107] The biodegradable mulch film formula optimization method proposed in the present application works in that it accurately identifies and quantifies key non-steady-state events in the farmland environment, thereby achieving adaptive adjustment of the mulch film formula. By monitoring the soil humidity change rate in real time, the present application can accurately identify two stress conditions, "high humidity impact" and "rapid drying", which have a decisive influence on the performance of biodegradable mulch film. This formula adjustment mechanism based on actual environmental quantitative data enables the generated biodegradable mulch film optimized formula to better adapt to the local farmland environment, ensuring that the mulch film maintains the necessary integrity during crop growth and effectively degrades after harvesting, thereby significantly improving the performance and environmental benefits of the mulch film.

[0108] The present application further proposes specific steps for adjusting a preset reference mulch film formula to generate a more adaptive biodegradable mulch film optimized formula.

[0109] The step of adjusting the preset reference mulch film formula according to the first time length and the second time length to generate a biodegradable mulch film optimized formula specifically includes:

[0110] comparing the first time length with a preset high humidity impact time threshold;

[0111] when the first time length is greater than the high humidity impact time threshold, adjusting the content of degradation promoters in the reference mulch film formula according to preset degradation promoter adjustment rules;

[0112] comparing the second time length with a preset rapid drying time threshold;

[0113] when the second time length is greater than the rapid drying time threshold, adjusting the content of plasticizers and / or anti-cracking agents in the reference mulch film formula according to preset plasticizer and / or anti-cracking agent adjustment rules;

[0114] According to the adjustment of the content of the degradation promoter in the benchmark mulch film formula, and the adjustment of the content of the plasticizer and / or the anti-cracking agent in the benchmark mulch film formula, the other components in the benchmark mulch film formula are adaptively adjusted to generate the biodegradable mulch film optimization formula.

[0115] Specifically, the first duration refers to the duration of the high-humidity impact of the soil, which reflects the degradation pressure that the mulch film may face in a humid environment. The high-humidity impact time threshold is a pre-set time limit for determining whether the influence of high-humidity impact on the degradation performance of the mulch film reaches a degree that requires formula adjustment. When the first duration exceeds the threshold, it indicates that the mulch film may face the risk of rapid degradation, and at this time, the content of the degradation promoter in the benchmark mulch film formula needs to be adjusted according to the pre-set degradation promoter adjustment rule to slow down the degradation speed and ensure the effectiveness of the mulch film in the agricultural cycle.

[0116] Specifically, the first duration refers to the duration of the high-humidity impact of the soil, which reflects the degradation pressure that the mulch film may face in a humid environment. The high-humidity impact time threshold is a pre-set time limit for determining whether the influence of high-humidity impact on the degradation performance of the mulch film reaches a degree that requires formula adjustment. When the first duration exceeds the threshold, it indicates that the mulch film may face the risk of rapid degradation, and at this time, the content of the degradation promoter in the benchmark mulch film formula needs to be adjusted according to the pre-set degradation promoter adjustment rule to slow down the degradation speed and ensure the effectiveness of the mulch film in the agricultural cycle.

[0117] In actual application, after adjusting the content of the degradation promoter and the content of the plasticizer and / or the anti-cracking agent, in order to ensure the performance balance and stability of the entire mulch film formula, adaptive adjustment of other components in the benchmark mulch film formula is also required.

[0118] The scheme of the present application can realize fine management of the biodegradable mulch film formula by introducing the threshold comparison mechanism of the first duration and the second duration, and adjusting the content of the degradation promoter and the plasticizer and / or the anti-cracking agent accordingly. Through precise adjustment of key components, the performance balance and stability of the mulch film under different environmental stresses are ensured.

[0119] In some embodiments of the above-mentioned scheme of the present application, the scheme of adjusting the content of the degradation promoter and the plasticizer and / or the anti-cracking agent in the benchmark mulch film formula according to the first duration and the second duration is proposed. Specifically, the degradation promoter adjustment rule and the plasticizer and / or the anti-cracking agent adjustment rule can be further refined as follows.

[0120] The degradation promoter adjustment rule is that, in an agricultural cycle, for each time period in which the first time period exceeds the high-humidity impact time threshold, the degradation promoter content in the benchmark mulch formula is reduced by a set content based on the degradation promoter content in the benchmark mulch formula;

[0121] The high-humidity impact time threshold has a value range of 1 hour to 3 hours.

[0122] The set time has a value range of 30 minutes to 90 minutes, and the set content has a value range of 0.02% to 0.1% of the degradation promoter content in the benchmark mulch formula in terms of weight percentage.

[0123] The plasticizer and / or anti-cracking agent adjustment rule is that, in an agricultural cycle, for each time period in which the second time period exceeds the rapid drying time threshold, the plasticizer and / or anti-cracking agent content in the benchmark mulch formula is increased by a first set content based on the plasticizer and / or anti-cracking agent content in the benchmark mulch formula.

[0124] The rapid drying time threshold has a value range of 4 hours to 6 hours.

[0125] The first set time has a value range of 30 minutes to 90 minutes, and the first set content has a value range of 0.05% to 0.15% of the plasticizer and / or anti-cracking agent content in the benchmark mulch formula in terms of weight percentage.

[0126] Specifically, the degradation promoter adjustment rule aims to dynamically adjust the content of the degradation promoter in the mulch formula according to the first time period during which the soil is in a high-humidity impact situation. The high-humidity impact time threshold is used to define the critical point of the degradation pressure that the mulch may face in a humid environment, and its value range can be set to 1 hour to 3 hours, which is specifically set according to different crops, soil types, and climate conditions. The set time refers to the interval at which the degradation promoter content needs to be adjusted once after the first time period exceeds the high-humidity impact time threshold, and its value range can be set to 30 minutes to 90 minutes. The set content refers to the specific amount of the degradation promoter content that is reduced each time the adjustment is made, and its specific value range can be set to 0.02% to 0.1% of the degradation promoter content in the benchmark mulch formula in terms of weight percentage.

[0127] Further, the plasticizer and / or anti-crisp agent adjustment rule is used to dynamically adjust the content of the plasticizer and / or anti-crisp agent in the mulch film formula according to the second duration of the soil being in a rapid drying situation. The rapid drying time threshold is used to define the critical point of the risk of brittle cracking that the mulch film may face in a dry environment, and its value range can be set to 4-6 hours, which can be set according to the material properties and application requirements of the mulch film. The first set time refers to the interval at which the content of the plasticizer and / or anti-crisp agent needs to be adjusted after the second duration exceeds the rapid drying time threshold, and its value range can be set to 30-90 minutes. The first set content refers to the specific amount of increase in the content of the plasticizer and / or anti-crisp agent at each adjustment, and its specific value range can be set to 0.05%-0.15% of the content of the plasticizer and / or anti-crisp agent in the reference mulch film formula based on the weight percentage.

[0128] The scheme of the present application introduces specific degradation promoter adjustment rules and plasticizer and / or anti-crisp agent adjustment rules, making the mulch film formula adjustment process more refined and quantitative. When the first duration of the soil being in a high-humidity impact situation exceeds the preset high-humidity impact time threshold, it indicates that the mulch film may face a higher risk of hydrolytic degradation. At this time, by reducing the set content of the degradation promoter every set time, the rapid degradation of the mulch film in a continuous high-humidity environment can be effectively slowed down, thereby prolonging the effective service life of the mulch film and avoiding the impact on crop growth due to premature degradation.

[0129] At the same time, when the second duration of the soil being in a rapid drying situation exceeds the preset rapid drying time threshold, it indicates that the mulch film may face the risk of brittle cracking due to water loss. By increasing the first set content of the plasticizer and / or anti-crisp agent every first set time, the flexibility and anti-crisp performance of the mulch film can be enhanced, effectively responding to physical stress in a dry environment, preventing premature damage to the mulch film, and ensuring its integrity throughout the entire agronomic cycle.

[0130] Through the above technical scheme, the mulch film formula optimization method can accurately and quantitatively adjust the content of the degradation promoter and the plasticizer and / or anti-crisp agent. In addition, through quantitative adjustment, the trial-and-error cost of formula adjustment can be reduced, the optimization efficiency can be improved, and more reliable and more economical biodegradable mulch film products can be provided for farmers.

[0131] The above-mentioned biodegradable mulch film formula optimization method further comprises, after the timer ends counting the duration of the soil being in a high-humidity impact situation:

[0132] real-time acquisition of the temperature under the reference mulch film and the ambient temperature;

[0133] judging whether the current temperature under the reference mulch film is in an abnormal downward trend according to a preset normal correlation rule between the temperature under the reference mulch film and the ambient temperature;

[0134] If the temperature under the reference mulch film is in an abnormal downward trend, it is determined that the surface under the mulch film is in a wet condition, and a timer is started to count the time when the surface under the mulch film is in the wet condition until the temperature under the mulch film returns to normal;

[0135] The step of counting the first time length of the soil being in the high-wet-impact condition and the second time length of the soil being in the rapid-drying condition in the agricultural cycle specifically comprises:

[0136] The step of counting the first time length of the soil being in the high-wet-impact condition, the second time length of the soil being in the rapid-drying condition, and the third time length of the surface under the mulch film being in the wet condition in the agricultural cycle;

[0137] The step of adjusting the preset reference mulch film formula according to the first time length and the second time length to generate the optimized formula of the biodegradable mulch film specifically comprises:

[0138] The step of adjusting the preset reference mulch film formula according to the first time length, the second time length, and the third time length to generate the optimized formula of the biodegradable mulch film.

[0139] The temperature under the reference mulch film and the ambient temperature are acquired in real time, which provides key data for determining whether the surface under the mulch film is in a wet condition. There is a normal correlation between the temperature under the reference mulch film and the ambient temperature. For example, in a steady-state environment without humidification operation, the two temperatures usually change synchronously or have a certain temperature difference. When the temperature under the reference mulch film abnormally decreases relative to the ambient temperature, it usually indicates that the surface under the mulch film may have condensed water or has been in contact with a humid medium (such as soil or accumulated water) for a long time, resulting in a change in heat transfer, so that the surface under the mulch film is in a wet condition. By starting a timer to count the time when the surface under the mulch film is in the wet condition, the duration of the surface under the mulch film being subjected to the humid stress can be accurately recorded until the temperature under the mulch film returns to normal, i.e., the wet condition is eliminated.

[0140] The scheme of the present application can accurately identify the condition that the surface under the mulch film is in a wet condition for a long time by introducing real-time monitoring of the temperature under the reference mulch film and the ambient temperature, and determining whether the surface under the mulch film is in an abnormal downward trend based on the normal correlation between the two. By considering the third time length in the formula adjustment, the content adjustment of the degradation promoter, the plasticizer, and / or the anti-cracking agent, etc. can be more scientifically guided, so that the mulch film formula can better adapt to the complex and changeable humid conditions in the actual farmland environment, thereby optimizing the degradation performance and mechanical stability of the mulch film.

[0141] The present application further provides a method for optimizing a formula of a biodegradable mulch film, which further comprises:

[0142] In the steady state environment without humidification operation, the temperature under the mulch film and the ambient temperature are continuously acquired; and according to the continuously acquired temperature under the mulch film and the ambient temperature, the normal correlation between the temperature under the mulch film and the ambient temperature is established;

[0143] The abnormal downward trend of the reference temperature under the mulch film is that the ambient temperature remains unchanged or continuously rises within a second set time, and the reference temperature under the mulch film decreases by a set number of degrees within the second set time; the second set time is in a range of 2 minutes to 10 minutes; and the set number of degrees is in a range of 0.5℃ to 3℃.

[0144] Specifically, in order to establish the normal correlation between the temperature under the mulch film and the ambient temperature, data acquisition can be performed in a steady state environment without humidification operation. The steady state environment without humidification operation refers to a period in which there is no external water source supplement such as irrigation and rainfall, and the external conditions such as the ambient temperature and humidity are relatively stable. During this period, by continuously acquiring the reference temperature under the mulch film and the ambient temperature data, a mathematical model or an empirical relationship between the two can be established by using statistical methods such as regression analysis and curve fitting, thereby forming the normal correlation. This correlation reflects the typical pattern of the temperature under the mulch film changing with the ambient temperature under normal dry or stable conditions.

[0145] The judgment of the abnormal downward trend of the reference temperature under the mulch film is accurately defined as follows: when the ambient temperature remains unchanged or continuously rises within a second set time, if the reference temperature under the mulch film decreases by a set number of degrees within the same second set time, it is determined to be an abnormal downward trend. The second set time can be understood as the duration of observing temperature change, and its value range can be set to 2 minutes to 10 minutes, for example, it can be set to 5 minutes. The set number of degrees refers to the amplitude of the temperature under the mulch film decreasing within the second set time, and its value range can be set to 0.5℃ to 3℃, for example, it can be set to 1℃. This accurate definition helps to exclude normal temperature fluctuations and accurately identify the abnormal heat loss caused by the wet surface of the mulch film.

[0146] The scheme of the present application establishes the normal correlation between the temperature under the mulch film and the ambient temperature in a steady state environment without humidification operation, and accurately defines the abnormal downward trend of the reference temperature under the mulch film, thereby solving the above-mentioned judgment deviation problem. This accurate judgment mechanism makes the identification of the wet surface of the mulch film more accurate and sensitive.

[0147] The application further proposes the above-mentioned biodegradable mulch film formula optimization method, and the step of adjusting the preset reference mulch film formula according to the first time length, the second time length and the third time length to generate a biodegradable mulch film optimization formula specifically includes:

[0148] According to the first duration and the third duration, the wet degradation stress that the reference mulch film needs to withstand is evaluated; and the content of degradation promoter in the reference mulch film formula is adjusted according to the wet degradation stress;

[0149] The second duration is compared with a preset rapid drying time threshold value;

[0150] When the second duration is greater than the rapid drying time threshold value, the content of plasticizer and / or anti-crisp agent in the reference mulch film formula is adjusted according to a preset plasticizer and / or anti-crisp agent adjustment rule;

[0151] According to the adjustment of the content of degradation promoter in the reference mulch film formula and the adjustment of the content of plasticizer and / or anti-crisp agent in the reference mulch film formula, other components in the reference mulch film formula are adaptively adjusted to generate an optimized biodegradable mulch film formula.

[0152] Specifically, when adjusting the preset reference mulch film formula, first, the first duration refers to the cumulative duration of the soil in the high-wet impact situation, reflecting the severe wet stress that the mulch film needs to withstand in a short period of time; and the third duration refers to the cumulative duration of the lower surface of the mulch film in the wet situation, reflecting the degradation pressure of the mulch film in the long-term wet environment. The first duration and the third duration are combined to more comprehensively evaluate the wet degradation stress that the reference mulch film needs to withstand. For example, the wet degradation stress can be quantified as a comprehensive index, which can be determined based on the weighted average of the first duration and the third duration, or the product of the two, or through a preset lookup table, to reflect the comprehensive influence of the wet degree and duration of the mulch film in the entire agricultural cycle on the degradation performance. According to the evaluated wet degradation stress, the content of degradation promoter in the reference mulch film formula is adjusted. For example, when the wet degradation stress is high, the content of degradation promoter may need to be appropriately reduced to avoid premature degradation of the mulch film; conversely, when the wet degradation stress is low, the content of degradation promoter can be appropriately increased to ensure that the mulch film can be fully degraded at the end of the agricultural cycle.

[0153] Secondly, the second duration is compared with a preset rapid drying time threshold value. The second duration refers to the cumulative duration of the soil in the rapid drying situation, reflecting the risk of brittleness that the mulch film may face in a dry environment. When the second duration is greater than the rapid drying time threshold value, it indicates that the mulch film is in a brittle environment for a long time, and at this time, the content of plasticizer and / or anti-crisp agent in the reference mulch film formula is adjusted according to a preset plasticizer and / or anti-crisp agent adjustment rule. For example, the content of plasticizer and / or anti-crisp agent can be proportionally increased according to the length of time that the second duration exceeds the threshold value, to enhance the flexibility and anti-crisp performance of the mulch film.

[0154] Finally, after completing the adjustment of the degradation promoter content in the reference mulch formula, and the adjustment of the plasticizer and / or anti-cracking agent content in the reference mulch formula, it is also necessary to make adaptive adjustments to other components in the reference mulch formula.

[0155] Referring to Figure 2 The specific embodiment of the present application also discloses a biodegradable mulch formula optimization system, comprising: an acquisition module 1, a timing module 2, a first timing module 3, a statistical module 4, and a generation module 5.

[0156] The acquisition module 1 is used for acquiring, in real time, a soil humidity value of soil on which a reference mulch is laid in a preset agricultural period, and calculating a humidity change rate of the soil in real time;

[0157] The timing module 2 is used for starting a timer to time when the soil humidity shows an upward trend and the current humidity change rate of the soil is greater than or equal to a preset high humidity impact critical value, and timing until the humidity change rate is lower than the high humidity impact critical value; the high humidity impact critical value is in a range of 2% / minute-8% / minute.

[0158] The first timing module 3 is used for starting a timer to time when the soil humidity shows a downward trend and the absolute value of the current humidity change rate of the soil is greater than or equal to a preset rapid drying critical value, and timing until the absolute value of the humidity change rate is lower than the rapid drying critical value; the rapid drying critical value is in a range of 1% / minute-5% / minute.

[0159] The statistical module 4 is used for statistically calculating a first time length of the soil in a high humidity impact situation and a second time length of the soil in a rapid drying situation in the agricultural period.

[0160] The generation module 5 is used for adjusting a preset reference mulch formula according to the first time length and the second time length to generate a biodegradable mulch optimization formula.

[0161] The biodegradable mulch formula optimization system disclosed by the present application can monitor and accurately quantify non-steady-state environmental stress events (such as high humidity impact and rapid drying) indicated by the soil humidity change rate in real time through the cooperative work of the acquisition module 1, the timing module 2, the first timing module 3, the statistical module 4 and the generation module 5, and accurately adjust the mulch formula according to the quantified stress time length. Therefore, the system can effectively improve the adaptability and performance of the biodegradable mulch in a complex farmland environment, ensure that the mulch maintains sufficient strength and integrity during the critical period of crop growth, and effectively degrades after the crop is harvested or at a specific time point.

[0162] The biodegradable mulch film formula optimization system provided in the present application is a system corresponding to the biodegradable mulch film formula optimization method described above, and its specific implementation mode and beneficial effects are basically the same as those of the method described above, and will not be repeated here.

[0163] The present application provides another biodegradable mulch film formula optimization method, which comprises:

[0164] In a preset agronomic cycle, the soil humidity value of the reference mulch is obtained in real time, and the humidity change rate of the soil is calculated in real time; the sound wave propagation speed of the reference mulch is periodically obtained at a set time interval;

[0165] When the soil humidity shows an upward trend, and the current soil humidity change rate is greater than or equal to a preset high humidity impact critical value, start a timer to time the soil in a high humidity impact situation until the humidity change rate is lower than the high humidity impact critical value; the high humidity impact critical value is in the range of 2% / min-8% / min;

[0166] When the soil humidity shows a downward trend, and the absolute value of the current soil humidity change rate is less than a preset slow drying critical value, start a timer to time the soil in a stable high humidity situation until the humidity value is lower than a preset high humidity critical value; the high humidity critical value is in the range of 60%-70%;

[0167] When the sound wave transmission speed shows an upward trend, determine whether the sound wave propagation speed exceeds a preset brittleness risk threshold value, if yes, start a timer to time the mulch in a brittleness risk situation until the sound wave transmission speed no longer shows an upward trend;

[0168] Statistically, the length of time A that the soil is in a high humidity impact situation, the length of time B that the soil is in a stable high humidity situation, and the length of time C that the mulch is in a brittleness risk situation in the agronomic cycle are obtained;

[0169] According to the length of time A and the length of time B, the content of degradation promoter in the preset reference mulch formula is adjusted, and according to the length of time C, the content of plasticizer and / or anti-brittleness agent in the preset reference mulch formula is adjusted, to generate a biodegradable mulch optimization formula.

[0170] The present application can more comprehensively and accurately evaluate the degradation and brittleness risk of the mulch in complex environments by introducing the monitoring of the physical properties (sound wave propagation speed) of the mulch itself and combining the more fine distinction of the high humidity and dry state of the soil, thereby realizing the precise adjustment of the formula and effectively improving the adaptability and service life of the mulch.

[0171] Some of the key terms and implementation environments in the biodegradable mulching film formula optimization method proposed in this application are the same as those in the above optimization method, which have been explained and described in detail in the above optimization method. Here, the preset agronomic cycle, soil moisture value, humidity change rate, high humidity impact critical value, degradation promoter, plasticizer, and anti-brittle agent are not repeated.

[0172] The "slow drying critical value" is a preset threshold value for determining whether the soil humidity decrease rate is in a slow state to identify the situation where the mulch is in a high humidity environment for a long time.

[0173] The "high humidity critical value" is a preset soil humidity threshold value for determining whether the soil is still in a high humidity state.

[0174] The "brittleness risk critical threshold" is a preset acoustic wave propagation speed threshold value for determining whether the mulch is at risk of brittleness.

[0175] In a preset agronomic cycle, the soil humidity value of the area where the reference mulch is laid is obtained in real time, and the humidity change rate of the soil is calculated in real time. The content of obtaining the soil humidity value and calculating the humidity change rate has been described in the above embodiment, and will not be repeated here. It should be emphasized that the acoustic wave propagation speed of the reference mulch is periodically obtained at a set time interval. For example, acoustic wave sensors such as ultrasonic transmitters and receivers can be placed under or on the surface of the farmland area where the reference mulch is laid. These sensors can transmit and receive acoustic waves at a preset time interval, and measure the time of acoustic wave propagation in or through the mulch. By knowing the distance and measuring the time, the acoustic wave propagation speed can be calculated. These data can be transmitted to the data processing unit for analysis.

[0176] When the soil humidity shows an upward trend, and the current soil humidity change rate is greater than or equal to the preset high humidity impact critical value, start the timer to count the time when the soil is in a high humidity impact situation until the humidity change rate is lower than the high humidity impact critical value; the high humidity impact critical value is in the range of 2% / min-8% / min; the specific implementation of this step has been described in the above embodiment, and will not be repeated here.

[0177] When the soil moisture is in a decreasing trend, and the absolute value of the current soil moisture change rate is less than the preset slow drying critical value, a timer is started to count the time when the soil is in a stable high-moisture state until the moisture value is lower than the preset high-moisture critical value. The high-moisture critical value can be set to a range of 60%-70%. For example, the data processing unit continuously monitors the calculated moisture change rate and the current soil moisture value. Once it is detected that the moisture value is continuously decreasing (i.e., the moisture change rate is negative), and its absolute value is less than the preset slow drying critical value (e.g., 0.8% / min), and the current soil moisture value is still higher than the preset high-moisture critical value (e.g., 65%), an internal timer is activated and starts to accumulate time. The timer will continue to run until the soil moisture value falls below the high-moisture critical value, at which time the timer pauses or stops accumulating.

[0178] When the acoustic wave transmission speed is in an increasing trend, it is determined whether the acoustic wave propagation speed exceeds the preset brittle risk critical threshold value, and if so, a timer is started to count the time when the mulch is in a brittle risk state until the acoustic wave transmission speed is no longer increasing. For example, the data processing unit continuously monitors the periodically obtained reference mulch acoustic wave propagation speed. Once it is detected that the acoustic wave propagation speed is continuously increasing, and its value exceeds the preset brittle risk critical threshold value (e.g., an increase of 15% compared to the initial reference speed), another internal timer is activated and starts to accumulate time. The timer will continue to run until the acoustic wave transmission speed is no longer increasing (e.g., starts to decrease or remains stable), at which time the timer pauses or stops accumulating. The brittle risk critical threshold value can be set according to the brittle characteristics and acoustic wave response law of the mulch material.

[0179] The time length A of the soil in a high-moisture impact state, the time length B of the soil in a stable high-moisture state, and the time length C of the mulch in a brittle risk state during the agricultural cycle are counted. For example, at the end of the entire agricultural cycle, the total time length accumulated by each of the above three timers can be read. Time length A represents the total time the soil is in a high-moisture impact state, time length B represents the total time the soil is in a stable high-moisture state, and time length C represents the total time the mulch is in a brittle risk state. These time length data can be stored in a database for subsequent formula adjustment steps.

[0180] According to the time length A, the time length B, the content of the degradation promoter in the preset reference mulch formula is adjusted, according to the time length C, the content of the plasticizer and / or the anti-brittle agent in the preset reference mulch formula is adjusted, and an optimized biodegradable mulch formula is generated. For example, a formula adjustment model or rule base based on the time length A, the time length B and the time length C can be established in advance. According to the counted time length A and the time length B, the content of the degradation promoter in the reference mulch formula can be preliminarily adjusted qualitatively or quantitatively. For example, if the time length A and / or the time length B is longer, it indicates that the mulch bears greater humid degradation stress, and the content of the degradation promoter can be reduced to delay the degradation. At the same time, according to the counted time length C, the content of the plasticizer and / or the anti-brittle agent in the reference mulch formula is preliminarily adjusted qualitatively or quantitatively. For example, if the time length C is longer, it indicates that the mulch faces higher risk of embrittlement, and the content of the plasticizer and / or the anti-brittle agent can be increased to improve the anti-brittle property. Finally, through these adjustments, and adaptive adjustment of other components in the reference mulch formula, an optimized biodegradable mulch formula more suitable for the specific agricultural cycle environment is generated.

[0181] The biodegradable mulch formula optimization method proposed in the present application is based on the principle of introducing the monitoring of the physical properties (sound wave propagation speed) of the mulch itself, and combining the more fine distinction of the high humidity and dry state of the soil, so as to realize the adaptive adjustment of the mulch formula. Compared with the method in the prior art which mainly relies on the soil humidity and its change rate to evaluate the degradation stress, the present application further identifies two stress states, i.e. the "stable high humidity situation" and the "embrittlement risk situation", which have a decisive influence on the performance of the biodegradable mulch. Specifically, when the soil humidity slowly decreases but is still in a high humidity state, the mulch can be soaked for a long time, accelerating the hydrolysis, which is quantified by the time length B; when the sound wave propagation speed rises, it directly reflects the hardening and embrittlement trend of the mulch material, which is quantified by the time length C. By accurately counting the duration of these specific situations, i.e. the time length A, the time length B and the time length C, the present method can more comprehensively quantify the cumulative environmental stress borne by the mulch in the entire agricultural cycle. Therefore, according to these quantified stress time lengths, the reference mulch formula is adjusted, for example, the time length A and B is longer, the degradation promoter is adjusted, and the time length C is longer, the plasticizer and / or the anti-brittle agent is adjusted. This formula adjustment mechanism based on the quantification data of the multi-dimensional environmental stress and the state of the mulch itself makes the generated optimized biodegradable mulch formula better adapt to the local farmland environment, ensures that the mulch maintains the necessary integrity during the growth of crops, and realizes effective degradation after harvesting, thereby significantly improving the performance and environmental benefits of the mulch.

[0182] The step of adjusting the content of the degradation promoter in the preset reference mulch formula according to the time length A and the time length B, and adjusting the content of the plasticizer and / or the anti-cracking agent in the preset reference mulch formula according to the time length C, to generate the optimized formula of the biodegradable mulch, specifically comprises:

[0183] According to the first wet degradation stress that the reference mulch needs to withstand, the content of the degradation promoter in the reference mulch formula is adjusted;

[0184] The time length C is compared with a preset brittle risk time threshold;

[0185] When the time length C is greater than the brittle risk time threshold, the content of the plasticizer and / or the anti-cracking agent in the reference mulch formula is adjusted according to a preset first plasticizer and / or anti-cracking agent adjustment rule;

[0186] According to the adjustment of the content of the degradation promoter in the reference mulch formula and the adjustment of the content of the plasticizer and / or the anti-cracking agent in the reference mulch formula, the other components in the reference mulch formula are adaptively adjusted to generate the optimized formula of the biodegradable mulch;

[0187] The first plasticizer and / or anti-cracking agent adjustment rule is that, in an agricultural cycle, for each third set time that the time length C exceeds the brittle risk time threshold, the content of the plasticizer and / or the anti-cracking agent in the reference mulch formula is increased by a second set content based on the content of the plasticizer and / or the anti-cracking agent in the reference mulch formula;

[0188] The brittle risk time threshold is in the range of 4 hours to 8 hours;

[0189] The third set time is in the range of 30 minutes to 90 minutes, and the second set content is in the range of 0.05% to 0.15% of the content of the plasticizer and / or the anti-cracking agent in the reference mulch formula in terms of weight percentage.

[0190] Specifically, evaluating the first wet degradation stress that the reference mulch needs to withstand means comprehensively considering the time length A of the soil in the high-wet impact situation and the time length B of the soil in the stable high-wet situation, and quantifying the degradation pressure of the mulch in the wet environment. For example, the stress value can be calculated by weighted average, cumulative effect model or expert experience-based scoring system, where the time length A may represent short-term high-intensity degradation risk and the time length B may represent long-term continuous degradation risk. Therefore, according to the first wet degradation stress, the content of the degradation promoter in the reference mulch formula is adjusted, so as to accurately match the content of the degradation promoter with the wet degradation pressure of the mulch in the actual agricultural cycle, and avoid premature degradation or insufficient degradation of the mulch due to improper content of the degradation promoter.

[0191] wherein the duration C is compared with a preset brittle risk time threshold, the purpose of which is to determine whether the mulch film is in an environment stress for a long time that may lead to brittleness. The brittle risk time threshold can be understood as the duration critical value at which the mulch film begins to have a significant risk of brittleness under the rising trend of acoustic wave propagation speed, and its value range can be set to 4-8 hours. When the duration C is greater than the brittle risk time threshold, it indicates that the mulch film faces a higher risk of brittleness, and at this time the formula needs to be adjusted to enhance its toughness.

[0192] In practical applications, the first plasticizer and / or anti-cracking agent adjustment rule is specifically that, within one agricultural cycle, if the duration C of the mulch film in the brittle risk situation exceeds the preset brittle risk time threshold, then every time a third set time is exceeded, the content of the plasticizer and / or anti-cracking agent in the base mulch film formula is increased by a second set content based on the content in the base mulch film formula. For example, the third set time value range can be set to 30-90 minutes, and the second set content value range can be set to 0.05%-0.15% of the content of the plasticizer and / or anti-cracking agent in the base mulch film formula in terms of weight percentage. The purpose of this is to ensure that the content of the plasticizer and / or anti-cracking agent can be moderately increased with the accumulation of the brittle risk, thereby effectively improving the anti-cracking performance and flexibility of the mulch film, through a quantitative and stepwise adjustment method.

[0193] In addition, according to the adjustment of the content of the degradation promoter in the base mulch film formula and the adjustment of the content of the plasticizer and / or anti-cracking agent in the base mulch film formula, other components in the base mulch film formula are adaptively adjusted, the purpose of which is to ensure the balance and stability of the entire formula.

[0194] The scheme of the present application can realize more refined formula optimization because it introduces quantitative evaluation of the stress borne by the mulch film and a threshold-based stepwise adjustment mechanism. It is because the time A and time B under the two conditions of high-moisture impact and stable high-moisture are comprehensively considered and converted into "first wet degradation stress" that the adjustment of the degradation promoter is no longer a simple linear relationship but can more accurately reflect the actual degradation pressure of the mulch film in a wet environment, thereby realizing the precise matching of the content of the degradation promoter. At the same time, by setting a brittle risk time threshold and combining with the "first plasticizer and / or anti-crisp agent adjustment rule", the increase amount of the plasticizer and / or anti-crisp agent can be directly linked to the brittle risk degree faced by the mulch film. This adjustment method based on cumulative time and set increment effectively avoids the problems of excessive addition or insufficient addition, ensuring that the mulch film still maintains good flexibility in dry or aged environments. Finally, through adaptive adjustment of other components, the synergy and stability of the entire optimized formula are ensured, and the overall performance of the mulch film is comprehensively improved.

[0195] Referring to Figure 3 The present application discloses another biodegradable mulch film formula optimization system, comprising: a first acquisition module 11, a second timing module 12, a third timing module 13, a fourth timing module 14, a first statistical module 15, and a first generation module 16.

[0196] The first acquisition module 11 is configured to acquire the soil humidity value of the reference mulch film in real time and calculate the humidity change rate of the soil in real time within a preset agricultural cycle; and periodically acquire the sound wave propagation speed of the reference mulch film at a set time interval.

[0197] The second timing module 12 is configured to start a timer to time when the soil humidity shows an upward trend and the current humidity change rate of the soil is greater than or equal to a preset high-moisture impact threshold value; and continue timing until the humidity change rate is lower than the high-moisture impact threshold value; and the high-moisture impact threshold value is in the range of 2% / min to 8% / min.

[0198] The third timing module 13 is configured to start a timer to time when the soil humidity shows a downward trend and the absolute value of the current humidity change rate of the soil is less than a preset slow drying threshold value; and continue timing until the humidity value is lower than a preset high-moisture threshold value; and the high-moisture threshold value is in the range of 60% to 70%.

[0199] The fourth timing module 14 is configured to determine whether the sound wave propagation speed exceeds a preset brittle risk threshold value when the sound wave propagation speed shows an upward trend; and if so, start a timer to time when the mulch film is in a brittle risk situation until the sound wave propagation speed no longer shows an upward trend.

[0200] The first statistical module 15 is configured to count the time length A of the soil in the high-humidity impact situation, the time length B of the soil in the stable high-humidity situation, and the time length C of the mulch in the embrittlement risk situation in the agricultural cycle.

[0201] The first generation module 16 is configured to adjust the content of the degradation promoter in the preset reference mulch formula according to the time length A and the time length B, and to adjust the content of the plasticizer and / or the anti-embrittlement agent in the preset reference mulch formula according to the time length C, to generate the optimized formula of the biodegradable mulch.

[0202] The system can accurately identify and quantify the various complex environmental stresses, such as high-humidity impact, stable high-humidity, and embrittlement risk, that the mulch is subjected to in the agricultural cycle, by integrating the real-time monitoring and analysis capabilities of multi-dimensional environmental parameters, including the soil humidity change rate and the sound wave propagation speed of the mulch. By accurately timing and counting the duration of these specific stress situations, the system can obtain the quantified time length A, time length B, and time length C. Therefore, the first generation module 16 can adjust the content of the degradation promoter, plasticizer, and / or anti-embrittlement agent in the reference mulch formula based on these quantitative data, to generate an optimized formula of the biodegradable mulch that is more suitable for the actual farmland environment. The system aims to solve the problem of insufficient processing of non-steady-state environmental information in the prior art mulch formula optimization, to ensure that the mulch maintains its expected functionality throughout the agricultural cycle, and to achieve effective degradation.

[0203] The biodegradable mulch formula optimization system proposed in the present application is a system corresponding to the above-mentioned biodegradable mulch formula optimization method, and its specific implementation manner and beneficial effects are basically consistent with those of the above-mentioned method, which will not be repeated here.

[0204] The above only describes the embodiments of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for optimizing the formulation of biodegradable mulch film, characterized in that, include: Within a preset agronomic cycle, the soil moisture value of the soil covered with the reference mulch is acquired in real time, and the rate of change of soil moisture is calculated in real time. When soil moisture shows an upward trend and the current rate of change of soil moisture is greater than or equal to the preset high moisture shock threshold, the timer is started to count the soil under high moisture shock conditions until the rate of change of moisture is lower than the high moisture shock threshold. When soil moisture shows a decreasing trend, and the absolute value of the current rate of change of soil moisture is greater than or equal to the preset rapid drying threshold, a timer is started to count the soil in a rapid drying condition until the absolute value of the rate of change of moisture is lower than the rapid drying threshold; the first duration of the soil in a high-moisture shock condition and the second duration of the soil in a rapid drying condition are recorded within the agronomic cycle. Based on the first duration and the second duration, the preset benchmark mulch film formula is adjusted to generate an optimized biodegradable mulch film formula.

2. The method for optimizing the biodegradable mulch film formulation according to claim 1, characterized in that, The steps for adjusting the preset baseline mulch film formulation based on the first and second durations to generate an optimized biodegradable mulch film formulation specifically include: The first duration is compared with a preset high humidity impact time threshold. When the first duration is greater than the high humidity impact time threshold, the content of degradation accelerator in the benchmark mulch film formulation is adjusted according to the preset degradation accelerator adjustment rules. The second duration is compared with a preset rapid drying time threshold; When the second time exceeds the rapid drying time threshold, the content of plasticizer and / or anti-brittleness agent in the benchmark mulch film formulation is adjusted according to the preset plasticizer and / or anti-brittleness agent adjustment rules; Based on adjustments to the content of degradation promoters and plasticizers and / or anti-brittleness agents in the benchmark mulch film formulation, other components in the benchmark mulch film formulation are adaptively adjusted to generate an optimized biodegradable mulch film formulation.

3. The method for optimizing the biodegradable mulch film formulation according to claim 2, characterized in that, The degradation accelerator adjustment rule is as follows: within an agronomic cycle, for each time the first duration exceeds the high humidity shock time threshold, the degradation accelerator content in the benchmark mulch film formulation is reduced by a set amount. The adjustment rule for the plasticizer and / or anti-brittleness agent is as follows: within an agronomic cycle, for each time the second duration exceeds the rapid drying time threshold, the content of the plasticizer and / or anti-brittleness agent in the base film formulation is increased by a first set content.

4. The method for optimizing the formulation of biodegradable mulch film according to any one of claims 1 to 3, characterized in that, After the timer finishes timing the soil under high-moisture impact, the following also applies: Real-time acquisition of the temperature beneath the reference plastic film and the ambient temperature; Based on the pre-defined normal correlation between the temperature below the benchmark mulch film and the ambient temperature, determine whether the current temperature below the benchmark mulch film is in an abnormal downward trend. If the temperature under the current reference mulch film is showing an abnormal downward trend, it is determined that the surface under the mulch film is wet, and a timer is started to count the time for the surface under the mulch film to be wet until the temperature under the mulch film returns to normal. The steps for determining the first duration of soil under high-moisture shock conditions and the second duration of soil under rapid drying conditions within the aforementioned agronomic cycle specifically include: The statistics show the duration of the soil under high humidity shock conditions, the duration of the soil under rapid drying conditions, and the duration of the soil under the mulch film being moist within the agronomic cycle. The step of adjusting the preset benchmark mulch film formula according to the first duration and the second duration to generate an optimized biodegradable mulch film formula specifically includes: Based on the first duration, the second duration, and the third duration, the preset benchmark mulch film formula is adjusted to generate an optimized biodegradable mulch film formula.

5. The method for optimizing the biodegradable mulch film formulation according to claim 4, characterized in that, Also includes: Under steady-state conditions without humidification, the temperature beneath the mulch film and the ambient temperature are continuously measured. Based on the continuously acquired temperature under the mulch film and ambient temperature, the normal correlation between the temperature under the mulch film and ambient temperature is established. The abnormal downward trend of the temperature under the reference mulch film is defined as follows: the ambient temperature remains unchanged or continues to rise within a second set time period, while the temperature under the reference mulch film decreases by a set number of degrees within the second set time period.

6. The method for optimizing the biodegradable mulch film formulation according to claim 4, characterized in that, The step of adjusting the preset benchmark mulch film formula according to the first duration, the second duration, and the third duration to generate an optimized biodegradable mulch film formula specifically includes: Based on the first and third time durations, assess the wet degradation stress that the benchmark mulch film needs to withstand; adjust the content of degradation promoter in the benchmark mulch film formulation according to the wet degradation stress; The second duration is compared with a preset rapid drying time threshold; When the second time exceeds the rapid drying time threshold, the content of plasticizer and / or anti-brittleness agent in the benchmark mulch film formulation is adjusted according to the preset plasticizer and / or anti-brittleness agent adjustment rules; Based on adjustments to the content of degradation promoters and plasticizers and / or anti-brittleness agents in the benchmark mulch film formulation, other components in the benchmark mulch film formulation are adaptively adjusted to generate an optimized biodegradable mulch film formulation.

7. A biodegradable mulch film formulation optimization system, characterized in that, include: The acquisition module is used to acquire the soil moisture value of the soil covered with the reference mulch film in real time within a preset agronomic cycle, and to calculate the rate of change of soil moisture in real time. The timing module is used to start a timer when the soil moisture is increasing and the current rate of change of soil moisture is greater than or equal to a preset high moisture shock threshold; the timer is started to keep track of the soil under high moisture shock conditions until the rate of change of moisture is lower than the high moisture shock threshold. The first timing module is used to start a timer when the soil moisture is decreasing and the absolute value of the current soil moisture change rate is greater than or equal to a preset rapid drying threshold, so as to start timing the soil in a rapid drying condition until the absolute value of the moisture change rate is lower than the rapid drying threshold. The statistics module is used to calculate the first duration of the soil under high humidity shock and the second duration of the soil under rapid drying during the agronomic cycle. The generation module is used to adjust the preset benchmark mulch film formula according to the first duration and the second duration to generate an optimized biodegradable mulch film formula.

8. A method for optimizing the formulation of biodegradable mulch film, characterized in that, include: Within a preset agronomic cycle, the soil moisture value of the soil covered with the reference mulch is acquired in real time, and the rate of change of soil moisture is calculated in real time. The acoustic wave propagation speed of the reference mulch film is periodically obtained at set time intervals; When soil moisture shows an upward trend and the current rate of change of soil moisture is greater than or equal to the preset high moisture shock threshold, the timer is started to count the soil under high moisture shock conditions until the rate of change of moisture is lower than the high moisture shock threshold. When the soil moisture is decreasing and the absolute value of the current rate of change of soil moisture is less than the preset slow drying threshold, the timer is started to count the soil when it is in a stable high moisture condition until the moisture value is lower than the preset high moisture threshold. When the sound wave transmission speed is on the rise, it is determined whether the sound wave propagation speed exceeds the preset critical threshold for embrittlement risk. If so, the timer is started to count the time for the mulch film under the embrittlement risk condition until the sound wave transmission speed no longer increases. The duration of soil under high humidity shock conditions (A), the duration of soil under stable high humidity conditions (B), and the duration of mulch film under risk of embrittlement (C) within the aforementioned agronomic cycle were statistically analyzed. Based on the duration A and the duration B, the content of degradation accelerator in the preset benchmark mulch film formula is adjusted, and based on the duration C, the content of plasticizer and / or anti-brittleness agent in the preset benchmark mulch film formula is adjusted to generate an optimized biodegradable mulch film formula.

9. The method for optimizing the biodegradable mulch film formulation according to claim 8, characterized in that, The steps of adjusting the content of degradation accelerator in the preset benchmark mulch film formulation according to the time duration A and the time duration B, and adjusting the content of plasticizer and / or anti-brittleness agent in the preset benchmark mulch film formulation according to the time duration C, to generate an optimized biodegradable mulch film formulation specifically include: Based on the durations A and B, assess the first wetting degradation stress that the benchmark mulch film needs to withstand; adjust the content of degradation promoter in the benchmark mulch film formulation according to the first wetting degradation stress; The duration C is compared with a preset embrittlement risk time threshold; When the duration C is greater than the embrittlement risk time threshold, the content of plasticizer and / or anti-embrittlement agent in the benchmark mulch film formulation is adjusted according to the preset first plasticizer and / or anti-embrittlement agent adjustment rules. Based on adjustments to the content of degradation promoters and plasticizers and / or anti-brittleness agents in the benchmark mulch film formulation, other components in the benchmark mulch film formulation are adaptively adjusted to generate an optimized biodegradable mulch film formulation. The adjustment rule for the first plasticizer and / or anti-brittleness agent is as follows: within an agronomic cycle, for each time the duration C exceeds the embrittlement risk time threshold, the content of the plasticizer and / or anti-brittleness agent in the base film formulation is increased by a second set content.

10. A biodegradable mulch film formulation optimization system, characterized in that, include: The first acquisition module is used to acquire the soil moisture value of the soil covered with the reference mulch film in real time within a preset agronomic cycle, and to calculate the rate of change of soil moisture in real time; and to periodically acquire the sound wave propagation speed of the reference mulch film at set time intervals. The second timing module is used to start a timer when the soil moisture is increasing and the current rate of change of soil moisture is greater than or equal to a preset high moisture impact threshold; the timer is started to keep track of the soil under high moisture impact until the rate of change of moisture is lower than the high moisture impact threshold. The third timing module is used to start the timer when the soil moisture is in a stable high-humidity condition, and when the absolute value of the current soil moisture change rate is less than the preset slow drying threshold, the timer will start to keep track until the moisture value is lower than the preset high-humidity threshold. The fourth timing module is used to determine whether the sound wave propagation speed exceeds the preset embrittlement risk threshold when the sound wave transmission speed is on the rise. If so, the timer is started to start timing the mulch film under the embrittlement risk condition until the sound wave transmission speed no longer increases. The first statistical module is used to count the duration A of the soil being under high humidity shock, the duration B of the soil being under stable high humidity, and the duration C of the mulch film being under risk of embrittlement within the agronomic cycle. The first generation module is used to adjust the content of degradation accelerator in the preset benchmark mulch film formula according to the duration A and the duration B, and to adjust the content of plasticizer and / or anti-brittleness agent in the preset benchmark mulch film formula according to the duration C, so as to generate an optimized biodegradable mulch film formula.

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