Ecological fertilization planting method and system for increasing selenium content in rice

Abstract

The invention discloses an ecological fertilization planting method and system for improving the selenium content in rice, which relates to the field of ecological fertilization planting, including: establishing a microalgae culture pool, using a selenium-rich water supply system to cultivate a specific microalgae species that can enrich selenium; analyzing the electrical signal characteristics of rice plants corresponding to different selenium contents at various growth stages, and establishing a plant selenium absorption electrical signal reaction pattern library; based on real-time detection of rice plant electrical signals and matching results of the plant selenium absorption electrical signal reaction pattern library, using an intelligent irrigation system to optimize and adjust the application amount of microalgae liquid supplied to the rice field; returning the remaining selenium-rich microalgae liquid to the culture pool for recycling, and dynamically regulating the selenium supplementation amount of the microalgae culture pool.

Description

Technical Field

[0001] The invention relates to the field of ecological fertilization and planting, and in particular to an ecological fertilization and planting method and system for increasing the selenium content in rice. Background Art

[0002] Increasing the selenium content in rice is an effective way to solve the problem of selenium deficiency, but the traditional method of applying selenium fertilizer has problems such as low utilization rate and environmental pollution. Finding a more environmentally friendly, sustainable and efficient selenium fertilization method that can not only increase the selenium content in rice, but also reduce the use of chemical fertilizers and avoid secondary pollution of soil and water bodies is a key issue in current agricultural technology. In addition, since the selenium demand of rice varies at different growth stages, accurate planning of the application of selenium fertilizer in rice fields based on the difference in selenium demand will help ensure the healthy growth of rice.

[0003] Based on the above ideas, how to realize an ecological fertilization and cultivation method to increase the selenium content in rice, by introducing selenium-enriched microalgae and combining it with intelligent irrigation technology to form a closed-loop ecosystem to reduce the use of chemical fertilizers, and at the same time accurately plan the application amount of selenium fertilizer based on electrical signal analysis of rice samples at each growth stage, is an urgent problem to be solved. Summary of the invention

[0004] In order to solve the above technical problems, an ecological fertilization planting method for increasing the selenium content in rice is provided. This technical solution solves the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0006] An ecological fertilization planting method for increasing the selenium content in rice, comprising:

[0007] Establish microalgae culture ponds and use selenium-rich water supply systems to cultivate specific microalgae species that can enrich selenium;

[0008] Analyze the electrical signal characteristics of rice plants at different growth stages corresponding to different selenium contents, and establish a model library of plant selenium absorption electrical signal response;

[0009] Based on the real-time detection of rice plant electrical signals and the matching results of the plant selenium absorption electrical signal response pattern library, the intelligent irrigation system is used to optimize the application amount of microalgae liquid supplied to the rice field;

[0010] The remaining selenium-rich microalgae liquid is returned to the culture pool for recycling, and the amount of selenium supplemented in the microalgae culture pool is dynamically regulated.

[0011] Preferably, the establishment of a microalgae culture pool and the use of a selenium-rich water supply system to cultivate specific microalgae species capable of enriching selenium specifically include:

[0012] A microalgae cultivation pond containing at least one type of microalgae is set up near the target rice field, and selenium-rich water is supplied to the microalgae cultivation pond;

[0013] By analyzing the changes in the concentration of organic selenium in the microalgae cells of each type of microalgae in the culture pool, the efficiency of each type of microalgae in absorbing inorganic selenium and converting it into organic selenium is measured and marked as selenium enrichment efficiency, where the selenium enrichment efficiency corresponds to a single type of microalgae;

[0014] Obtain the growth cycle of each microalgae, and based on the selenium enrichment efficiency and growth cycle of each microalgae, comprehensively calculate the theoretical organic selenium conversion rate of each microalgae, mark the microalgae species with the largest theoretical organic selenium conversion rate as organic selenium source microalgae, and filter out the microalgae in the culture pool except the organic selenium source microalgae;

[0015] Control variables of the culture environment conditions of the organic selenium source microalgae culture pool, and select the optimal environment conditions for the organic selenium source microalgae for cultivation based on the actual conversion rate of organic selenium;

[0016] The selenium concentration in the water of the organic selenium source microalgae culture pool is monitored regularly, and the selenium concentration in the organic selenium source microalgae culture pool is maintained within the upper and lower range of the Michaelis constant by adjusting the amount of selenium added to the selenium-rich water.

[0017] Preferably, the step of analyzing the electrical signal characteristics of rice plants at different growth stages corresponding to different selenium contents and establishing a plant selenium absorption electrical signal reaction pattern library specifically comprises:

[0018] The growth stages of rice are divided into tillering stage, jointing stage, booting stage, heading stage and filling stage. According to the demand for selenium and the absorption rate of rice at different growth stages, the standard reference value of selenium content in the root and stem of rice at each growth stage is set by testing the root activity of the plant.

[0019] Select rice plant experimental samples at different growth stages from rice grown in selenium-deficient soil, and place the experimental samples in a culture pool of organic selenium-source microalgae;

[0020] High-sensitivity electrical signal monitoring is performed on the root system of the plant. The data of the electrical signals of the plant at different growth stages and the change data of the selenium content in the root system are collected at set time intervals. When the selenium content in the root and stem reaches the standard reference value, the data is filtered and amplified and then input into the central control system.

[0021] The mathematical relationship between the selenium content in the roots and stems of rice at different growth stages and the electrical signals was analyzed, and a model library of plant selenium absorption electrical signal response was established. Specifically:

[0022] Conducting electrical signal spectrum analysis on rice samples at each growth stage, identifying the frequency components of plant electrical signals at adjacent collection times through harmonic decomposition;

[0023] Conduct phase change analysis of electrical signals of rice samples at each growth stage to identify phase shifts of electrical signals of plants with a set number of adjacent data collections;

[0024] The frequency component of the plant electrical signal and the phase shift of the plant electrical signal are combined into the plant electrical signal feature, and the corresponding relationship between the plant electrical signal feature and the selenium content of the plant root and stem is established;

[0025] The plant electrical signal characteristics of all collected data at each growth stage were merged with the corresponding relationship between the changes in selenium content in the plant roots and stems to establish a plant selenium absorption electrical signal response pattern library.

[0026] Preferably, the method of optimizing and adjusting the amount of microalgae solution supplied to the rice field by using an intelligent irrigation system based on the real-time detection of rice plant electrical signals and the matching results of the plant selenium absorption electrical signal reaction pattern library specifically includes:

[0027] When the selenium concentration in the organic selenium source microalgae culture pool is within the set upper and lower ranges of the Michaelis constant within the set observation time window, the microalgae liquid in the organic selenium source microalgae culture pool is connected to the rice field through a circulating water system;

[0028] Obtain the rice plant density and area of ​​the rice field, set the rice field detection grid area according to the plant density and area, select at least one plant in each grid area and mark it as the detection rice plant in the grid area;

[0029] The electric signal of the rice plants detected in all grid areas is detected in real time at the set frequency, and the frequency component and phase offset of the electric signal of the rice plants detected in each grid area are obtained. The electric signal characteristics of the rice plants detected in each grid area are established, and the electric signal characteristics of the rice plants detected in each grid area are brought into the plant selenium absorption electric signal reaction pattern library to calculate the matching degree of the electric signal characteristics of the plants. The calculation expression of the matching degree of the electric signal characteristics of the plants is:

[0030]

[0031] In the formula, is the matching degree of plant electrical signal characteristics, is the complex value of the ith frequency component, is the phase difference corresponding to the i-th frequency component, is the number of frequency components;

[0032] The growth stage of the rice plant and the selenium content of the corresponding plant root and stem in each grid area are obtained by calculating the matching degree of the plant electrical signal characteristics;

[0033] Compare the deviation of the selenium content of the rhizomes of the rice plants tested in each grid area with the standard reference value of the selenium content of the rhizomes in its growth stage, and plan the irrigation amount of the microalgae solution in each grid area according to the deviation amount of each grid area and the proportion of the deviation amount to the total deviation amount of all grids according to the same proportion;

[0034] The electrical signals of the rice plants in each grid area are continuously detected until the electrical signals of the rice plants in a certain grid area are detected to have a similarity with the electrical signals of the standard reference value of the selenium content of the rhizomes in the corresponding growth period reaching a set threshold, and then the irrigation of the grid area is stopped.

[0035] Preferably, the remaining selenium-rich microalgae liquid is returned to the culture pool for recycling, and the dynamic regulation of the selenium supplement amount in the microalgae culture pool specifically includes:

[0036] Detect the selenium content of the remaining microalgae liquid, and calculate the equivalent inorganic selenium content of the remaining microalgae liquid according to the selenium enrichment efficiency of inorganic selenium converted into organic selenium in the microalgae culture pool;

[0037] The unused microalgae liquid is returned to the microalgae culture pool through the recovery device of the irrigation system, and the supply of selenium-rich water in the microalgae culture pool is adjusted in real time based on the equivalent inorganic selenium content of the remaining microalgae liquid.

[0038] Furthermore, an ecological fertilization planting system for increasing the selenium content in rice is proposed, which is used to implement the above-mentioned ecological fertilization planting method for increasing the selenium content in rice, comprising:

[0039] A selenium-enriched microalgae cultivation module, wherein the selenium-enriched microalgae cultivation module measures the efficiency of each microalgae in absorbing inorganic selenium and converting it into organic selenium by analyzing the change of organic selenium concentration in the microalgae cells of each microalgae in the cultivation pool, regularly monitors the selenium concentration in the water of the organic selenium source microalgae cultivation pool, and maintains the selenium concentration of the organic selenium source microalgae cultivation pool within the upper and lower ranges set by the Michaelis constant by adjusting the amount of selenium added in the selenium-enriched water;

[0040] An electric signal reaction pattern library establishment module, wherein the electric signal reaction pattern library establishment module sets a standard reference value of the selenium content of the rhizomes at each growth stage of rice by detecting the vitality of the plant root system, analyzes the mathematical relationship between the selenium content of the rhizomes at each growth stage of rice and the electric signal, performs electric signal analysis on rice samples at each growth stage, identifies the plant electric signal frequency components and the plant electric signal phase offset of the set number of adjacent collected data, and establishes a plant selenium absorption electric signal reaction pattern library;

[0041] A microalgae liquid application amount adjustment module, which sets the rice field detection grid area, establishes the plant electrical signal characteristics of the rice plants detected in each grid area, brings in the plant selenium absorption electrical signal reaction pattern library to calculate the plant electrical signal characteristic matching degree, obtains the growth stage of the rice plants detected in each grid area and the corresponding plant root and stem selenium content, and plans the irrigation amount of the microalgae liquid in each grid area;

[0042] The microalgae liquid circulation module calculates the equivalent inorganic selenium content of the remaining microalgae liquid according to the selenium enrichment efficiency of converting inorganic selenium into organic selenium in the microalgae culture pool, and adjusts the supply of selenium-rich water in the microalgae culture pool in real time based on the equivalent inorganic selenium content of the remaining microalgae liquid.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] A selenium-rich water supply system is used to cultivate specific microalgae species that can enrich selenium. The electrical signal characteristics of rice plants corresponding to different selenium contents at each growth stage are analyzed to establish a plant selenium absorption electrical signal response pattern library. Based on the real-time detection of rice plant electrical signals and the matching results of the plant selenium absorption electrical signal response pattern library, an intelligent irrigation system is used to optimize the application amount of microalgae liquid supplied to the rice field, and the remaining selenium-rich microalgae liquid is returned to the culture pool for recycling, thereby dynamically regulating the selenium supplementation amount of the microalgae culture pool.

[0045] By introducing selenium-enriched microalgae and combining it with intelligent irrigation technology, a closed-loop ecosystem is formed. At the same time, electrical signal analysis is performed based on rice samples at each growth stage, which enables precise planning to reduce the use of chemical fertilizers and the application of selenium fertilizers. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a flow chart of an ecological fertilization planting method for increasing the selenium content in rice according to the present invention;

[0047] Figure 2 A flow chart of establishing a microalgae culture pool and utilizing a selenium-rich water supply system to cultivate specific microalgae species capable of enriching selenium according to the present invention;

[0048] Figure 3 For the present invention, a flow chart of a plant selenium absorption electrical signal reaction model library is established for analyzing the plant electrical signal characteristics corresponding to different selenium contents at various growth stages of rice;

[0049] Figure 4 This is a flow chart of optimizing and adjusting the application amount of microalgae liquid supplied to the rice field by using an intelligent irrigation system based on the real-time detection of rice plant electrical signals and the matching results of the plant selenium absorption electrical signal reaction pattern library;

[0050] Figure 5 A flow chart of the present invention of returning the remaining selenium-rich microalgae liquid to the culture pool for recycling and dynamically regulating the amount of selenium supplemented in the microalgae culture pool;

[0051] Figure 6 The present invention is a schematic structural diagram of an ecological fertilization and planting system for increasing the selenium content in rice. DETAILED DESCRIPTION

[0052] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0053] Reference Figure 1 As shown, an ecological fertilization planting method for increasing the selenium content in rice comprises:

[0054] Establish microalgae culture ponds and use selenium-rich water supply systems to cultivate specific microalgae species that can enrich selenium;

[0055] Analyze the electrical signal characteristics of rice plants at different growth stages corresponding to different selenium contents, and establish a model library of plant selenium absorption electrical signal response;

[0056] Based on the real-time detection of rice plant electrical signals and the matching results of the plant selenium absorption electrical signal response pattern library, the intelligent irrigation system is used to optimize the application amount of microalgae liquid supplied to the rice field;

[0057] The remaining selenium-rich microalgae liquid is returned to the culture pool for recycling, and the amount of selenium supplemented in the microalgae culture pool is dynamically regulated.

[0058] Reference Figure 2 As shown, a microalgae cultivation pool is established, and a selenium-rich water supply system is used to cultivate specific microalgae species that can enrich selenium, including:

[0059] A microalgae cultivation pond containing at least one type of microalgae is set up near the target rice field, and selenium-rich water is supplied to the microalgae cultivation pond;

[0060] By analyzing the changes in the concentration of organic selenium in the microalgae cells of each type of microalgae in the culture pool, the efficiency of each type of microalgae in absorbing inorganic selenium and converting it into organic selenium is measured and marked as selenium enrichment efficiency, where the selenium enrichment efficiency corresponds to a single type of microalgae;

[0061] The growth cycle of each microalgae is obtained, and based on the selenium enrichment efficiency and growth cycle of each microalgae, the theoretical organic selenium conversion rate of each microalgae is comprehensively calculated. The theoretical organic selenium conversion rate is calculated as the ratio of the selenium enrichment efficiency to the growth cycle, which represents the total amount of selenium enriched by the microalgae in the same period of time. The microalgae species with the largest theoretical organic selenium conversion rate are marked as organic selenium source microalgae, and the microalgae other than the organic selenium source microalgae in the culture pool are filtered out;

[0062] Control variables of the culture environment conditions of the organic selenium source microalgae culture pool, and select the optimal environment conditions for the organic selenium source microalgae for cultivation based on the actual conversion rate of organic selenium;

[0063] The selenium concentration in the water of the organic selenium source microalgae culture pool is monitored regularly, and the selenium concentration in the organic selenium source microalgae culture pool is maintained within the upper and lower range of the Michaelis constant by adjusting the amount of selenium added in the selenium-rich water. The Michaelis constant related formula is:

[0064]

[0065] In the formula Indicates the absorption rate of selenium by microalgae, is the maximum absorption rate, is the selenium concentration in water, is the Michaelis constant, which is used to indicate that in an enzyme-catalyzed reaction, when the substrate concentration reaches the Michaelis constant, the reaction rate reaches half of the maximum rate.

[0066] By regularly monitoring the selenium concentration in the water and adjusting the amount of selenium added to the water, we can ensure that the selenium concentration is always maintained near the Michaelis constant, thereby ensuring that the microalgae can absorb selenium efficiently.

[0067] Reference Figure 3 As shown, the electrical signal characteristics of rice plants corresponding to different selenium contents at different growth stages are analyzed, and the plant selenium absorption electrical signal response model library is established, which specifically includes:

[0068] The growth stages of rice are divided into tillering stage, jointing stage, booting stage, heading stage and filling stage. According to the demand for selenium and absorption rate of rice in different growth stages, the standard reference value of selenium content in the rhizomes of rice at each growth stage is set by detecting the activity of plant roots. The standard reference value of selenium content in the rhizomes is set based on the selenium content in the rhizomes corresponding to the maximum value of plant root activity.

[0069] Select rice plant experimental samples at different growth stages from rice grown in selenium-deficient soil, and place the experimental samples in a culture pool of organic selenium-source microalgae;

[0070] High-sensitivity electrical signal monitoring is performed on the root system of the plant. The data of the electrical signals of the plant at different growth stages and the change data of the selenium content in the root system are collected at set time intervals. When the selenium content in the root and stem reaches the standard reference value, the data is filtered and amplified and then input into the central control system.

[0071] The mathematical relationship between the selenium content in the roots and stems of rice at different growth stages and the electrical signals was analyzed, and a model library of plant selenium absorption electrical signal response was established. Specifically:

[0072] The electric signal spectrum analysis of rice samples at each growth stage is carried out. Through harmonic decomposition, the frequency components of the plant electric signal of the set number of adjacent data collections are identified. Through harmonic decomposition, the electric signal components within a specific frequency range are identified to understand the physiological response of the plant under different selenium contents. For plants with insufficient selenium, some high-frequency harmonics may be found to increase, while low-frequency components dominate when selenium is sufficient, reflecting the healthy and stable physiological state of the plant.

[0073] This method helps to capture subtle differences in electrical signals under different selenium absorption conditions, and is particularly suitable for evaluating changes in electrical signals during long-term selenium deficiency or excess, specifically:

[0074] The collected electrical signal is converted into a frequency domain signal through Fourier transform, and the expression is:

[0075]

[0076] in, is the spectral component corresponding to frequency f, It is the timing signal of the electrical signal.

[0077] The phase change of the electrical signal of rice samples at each growth stage was analyzed to identify the phase shift of the electrical signal of the plant with a set number of adjacent data collections. By monitoring the phase of the electrical signal at different growth stages, the phase shift of the plant when selenium is insufficient was identified. The phase shift can reflect the speed of change of the cell membrane potential. When selenium is deficient, the switching speed of the ion channel may be slowed down, and the phase of the electrical signal will also shift accordingly.

[0078] Compared with conventional amplitude and frequency analysis, phase shift can reveal more complex associations between electrical signals and selenium absorption. In particular, when selenium deficiency is mild but no significant physiological response occurs, phase changes can serve as early signals.

[0079] The frequency component of the plant electrical signal and the phase shift of the plant electrical signal are combined into the plant electrical signal feature, and the corresponding relationship between the plant electrical signal feature and the selenium content of the plant root and stem is established;

[0080] The plant electrical signal characteristics of all collected data at each growth stage were merged with the corresponding relationship between the changes in selenium content in the plant roots and stems to establish a plant selenium absorption electrical signal response pattern library.

[0081] Reference Figure 4 As shown, based on the real-time detection of rice plant electrical signals and the matching results of the plant selenium absorption electrical signal response pattern library, the intelligent irrigation system is used to optimize and adjust the application amount of the microalgae liquid supplied to the rice field, specifically including:

[0082] When the selenium concentration in the organic selenium source microalgae culture pool is within the set upper and lower ranges of the Michaelis constant within the set observation time window, the microalgae liquid in the organic selenium source microalgae culture pool is connected to the rice field through a circulating water system;

[0083] Obtain the rice plant density and area of ​​the rice field, set the rice field detection grid area according to the plant density and area, select at least one plant in each grid area and mark it as the detection rice plant in the grid area;

[0084] The purpose of gridding and testing rice fields is to detect the uneven distribution of microalgae liquid caused by factors such as terrain and the direction of circulating water.

[0085] The electric signal of the rice plants detected in all grid areas is detected in real time at the set frequency, and the frequency component and phase offset of the electric signal of the rice plants detected in each grid area are obtained. The electric signal characteristics of the rice plants detected in each grid area are established, and the electric signal characteristics of the rice plants detected in each grid area are brought into the plant selenium absorption electric signal reaction pattern library to calculate the matching degree of the electric signal characteristics of the plants. The calculation expression of the matching degree of the electric signal characteristics of the plants is:

[0086]

[0087] In the formula, is the matching degree of plant electrical signal characteristics, is the complex value of the ith frequency component, is the phase difference corresponding to the i-th frequency component, is the number of frequency components;

[0088] The growth stage of the rice plant and the selenium content of the corresponding plant root and stem in each grid area are obtained by calculating the matching degree of the plant electrical signal characteristics;

[0089] Compare the deviation of the selenium content of the rhizomes of the rice plants tested in each grid area with the standard reference value of the selenium content of the rhizomes in its growth stage, and plan the irrigation amount of the microalgae solution in each grid area according to the deviation amount of each grid area and the proportion of the deviation amount to the total deviation amount of all grids according to the same proportion;

[0090] The electrical signals of the detected rice plants in each grid area are continuously detected until the electrical signals of the rice plants in a certain grid area are detected to have a similarity with the electrical signals of the standard reference value of the selenium content in the root and stem of the corresponding growth period reaches a set threshold, and then irrigation of the grid area is stopped until the detected rice plants in the grid area are detected to be in the next growth stage.

[0091] Reference Figure 5 As shown, the remaining selenium-rich microalgae liquid is returned to the culture pool for recycling. The dynamic regulation of the selenium supplement amount in the microalgae culture pool specifically includes:

[0092] When the smart irrigation system applies microalgae liquid to the rice field, some of the selenium-rich microalgae suspension may not be completely absorbed by the rice roots or leaves. To avoid the waste of these unabsorbed selenium-rich liquids, the unused microalgae liquid is returned to the microalgae culture pool through the recycling device of the irrigation system. The returned microalgae suspension will be mixed with the new selenium mineral water or circulating water in the culture pool and continue to be used for selenium-rich microalgae culture.

[0093] The selenium content of the remaining microalgae liquid was detected, and the equivalent inorganic selenium content of the remaining microalgae liquid was calculated according to the selenium enrichment efficiency of inorganic selenium converted into organic selenium in the microalgae culture pool. The calculation expression of the equivalent inorganic selenium content is:

[0094]

[0095] In the formula, is the equivalent inorganic selenium content, is the residual selenium content of microalgae liquid at time t, is the selenium enrichment efficiency at time t.

[0096] When the refluxed microalgae suspension returns to the culture tank, the system will monitor the selenium concentration and microalgae biomass in the culture tank through sensors. The refluxed microalgae suspension may have lost some selenium, so the system needs to adjust the amount of selenium mineral solution added to ensure that the selenium concentration in the culture tank is maintained within the optimal selenium enrichment efficiency range of the microalgae.

[0097] The unused microalgae liquid is returned to the microalgae culture pool through the recovery device of the irrigation system, and the supply of selenium-rich water in the microalgae culture pool is adjusted in real time based on the equivalent inorganic selenium content of the remaining microalgae liquid.

[0098] For further information, see Figure 6 As shown, based on the same inventive concept as the above-mentioned ecological fertilization planting method for increasing the selenium content in rice, this scheme also proposes an ecological fertilization planting system for increasing the selenium content in rice, comprising:

[0099] A selenium-enriched microalgae cultivation module, wherein the selenium-enriched microalgae cultivation module measures the efficiency of each microalgae in absorbing inorganic selenium and converting it into organic selenium by analyzing the change of organic selenium concentration in the microalgae cells of each microalgae in the cultivation pool, regularly monitors the selenium concentration in the water of the organic selenium source microalgae cultivation pool, and maintains the selenium concentration of the organic selenium source microalgae cultivation pool within the upper and lower ranges set by the Michaelis constant by adjusting the amount of selenium added in the selenium-enriched water;

[0100] An electric signal reaction pattern library establishment module, wherein the electric signal reaction pattern library establishment module sets a standard reference value of the selenium content of the rhizomes at each growth stage of rice by detecting the vitality of the plant root system, analyzes the mathematical relationship between the selenium content of the rhizomes at each growth stage of rice and the electric signal, performs electric signal analysis on rice samples at each growth stage, identifies the plant electric signal frequency components and the plant electric signal phase offset of the set number of adjacent collected data, and establishes a plant selenium absorption electric signal reaction pattern library;

[0101] A microalgae liquid application amount adjustment module, which sets the rice field detection grid area, establishes the plant electrical signal characteristics of the rice plants detected in each grid area, brings in the plant selenium absorption electrical signal reaction pattern library to calculate the plant electrical signal characteristic matching degree, obtains the growth stage of the rice plants detected in each grid area and the corresponding plant root and stem selenium content, and plans the irrigation amount of the microalgae liquid in each grid area;

[0102] The microalgae liquid circulation module calculates the equivalent inorganic selenium content of the remaining microalgae liquid according to the selenium enrichment efficiency of converting inorganic selenium into organic selenium in the microalgae culture pool, and adjusts the supply of selenium-rich water in the microalgae culture pool in real time based on the equivalent inorganic selenium content of the remaining microalgae liquid.

[0103] Furthermore, the present solution also proposes a storage medium for an ecological fertilization planting method for increasing the selenium content in rice, on which a computer-readable program is stored. When the computer-readable program is called, the above-mentioned ecological fertilization planting method for increasing the selenium content in rice is executed.

[0104] It is understandable that the storage medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; an optical medium, such as a DVD; or a semiconductor medium, such as a solid state drive (SSD).

[0105] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. An ecological fertilization planting method for increasing the selenium content in rice, characterized in that: include: Establish microalgae culture ponds and use selenium-rich water supply systems to cultivate specific microalgae species that can enrich selenium; Analyze the electrical signal characteristics of rice plants at different growth stages corresponding to different selenium contents, and establish a model library of plant selenium absorption electrical signal response; Based on the real-time detection of rice plant electrical signals and the matching results of the plant selenium absorption electrical signal response pattern library, the intelligent irrigation system is used to optimize the application amount of microalgae liquid supplied to the rice field; The remaining selenium-rich microalgae liquid is returned to the culture pool for recycling, and the amount of selenium supplemented in the microalgae culture pool is dynamically regulated; The analyzing of the electrical signal characteristics of rice plants corresponding to different selenium contents at various growth stages and establishing a plant selenium absorption electrical signal response pattern library specifically includes: The growth stages of rice are divided into tillering stage, jointing stage, booting stage, heading stage and filling stage. According to the demand for selenium and the absorption rate of rice at different growth stages, the standard reference value of selenium content in the root and stem of rice at each growth stage is set by testing the root activity of the plant. Select rice plant experimental samples at different growth stages from rice grown in selenium-deficient soil, and place the experimental samples in a culture pool of organic selenium-source microalgae; High-sensitivity electrical signal monitoring is performed on the root system of the plant. The data of the electrical signals of the plant at different growth stages and the change data of the selenium content in the root system are collected at set time intervals. When the selenium content in the root and stem reaches the standard reference value, the data is filtered and amplified and then input into the central control system. The mathematical relationship between the selenium content in the roots and stems of rice at different growth stages and the electrical signals was analyzed, and a model library of plant selenium absorption electrical signal response was established. Specifically: Conducting electrical signal spectrum analysis on rice samples at each growth stage, identifying the frequency components of plant electrical signals at adjacent collection times through harmonic decomposition; Conduct phase change analysis of electrical signals of rice samples at each growth stage to identify phase shifts of electrical signals of plants with a set number of adjacent data collections; The frequency component of the plant electrical signal and the phase shift of the plant electrical signal are combined into the plant electrical signal feature, and the corresponding relationship between the plant electrical signal feature and the selenium content of the plant root and stem is established; The plant electrical signal characteristics of all collected data at each growth stage were merged with the corresponding relationship between the changes in selenium content in the plant roots and stems to establish a plant selenium absorption electrical signal response pattern library.

2. The ecological fertilization planting method for increasing the selenium content in rice according to claim 1, characterized in that: The establishment of a microalgae culture pool and the use of a selenium-rich water supply system to cultivate specific microalgae species capable of enriching selenium specifically include: A microalgae cultivation pond containing at least one type of microalgae is set up near the target rice field, and selenium-rich water is supplied to the microalgae cultivation pond; By analyzing the changes in the concentration of organic selenium in the microalgae cells of each type of microalgae in the culture pool, the efficiency of each type of microalgae in absorbing inorganic selenium and converting it into organic selenium is measured and marked as selenium enrichment efficiency, where the selenium enrichment efficiency corresponds to a single type of microalgae; Obtain the growth cycle of each microalgae, and based on the selenium enrichment efficiency and growth cycle of each microalgae, comprehensively calculate the theoretical organic selenium conversion rate of each microalgae, mark the microalgae species with the largest theoretical organic selenium conversion rate as organic selenium source microalgae, and filter out the microalgae in the culture pool except the organic selenium source microalgae; Control variables of the culture environment conditions of the organic selenium source microalgae culture pool, and select the optimal environment conditions for the organic selenium source microalgae for cultivation based on the actual conversion rate of organic selenium; The selenium concentration in the water of the organic selenium source microalgae culture pool is monitored regularly, and the selenium concentration in the organic selenium source microalgae culture pool is maintained within the upper and lower range of the Michaelis constant by adjusting the amount of selenium added to the selenium-rich water.

3. The ecological fertilization planting method for increasing the selenium content in rice according to claim 2, characterized in that: The method of optimizing and adjusting the amount of microalgae solution supplied to the rice field by using the intelligent irrigation system based on the real-time detection of rice plant electrical signals and the matching results of the plant selenium absorption electrical signal reaction pattern library specifically includes: When the selenium concentration in the organic selenium source microalgae culture pool is within the set upper and lower ranges of the Michaelis constant within the set observation time window, the microalgae liquid in the organic selenium source microalgae culture pool is connected to the rice field through a circulating water system; Obtain the rice plant density and area of ​​the rice field, set the rice field detection grid area according to the plant density and area, select at least one plant in each grid area and mark it as the detection rice plant in the grid area; The electric signal of the rice plants detected in all grid areas is detected in real time at the set frequency, and the frequency component and phase offset of the electric signal of the rice plants detected in each grid area are obtained. The electric signal characteristics of the rice plants detected in each grid area are established, and the electric signal characteristics of the rice plants detected in each grid area are brought into the plant selenium absorption electric signal reaction pattern library to calculate the matching degree of the electric signal characteristics of the plants. The calculation expression of the matching degree of the electric signal characteristics of the plants is: ； In the formula, is the matching degree of plant electrical signal characteristics, is the complex value of the ith frequency component, is the phase difference corresponding to the i-th frequency component, is the number of frequency components; The growth stage of the rice plant and the selenium content of the corresponding plant root and stem in each grid area are obtained by calculating the matching degree of the plant electrical signal characteristics; Compare the deviation of the selenium content of the rhizomes of the rice plants tested in each grid area with the standard reference value of the selenium content of the rhizomes in its growth stage, and plan the irrigation amount of the microalgae solution in each grid area according to the deviation amount of each grid area and the proportion of the deviation amount to the total deviation amount of all grids according to the same proportion; The electrical signals of the rice plants in each grid area are continuously detected until the electrical signals of the rice plants in a certain grid area are detected to have a similarity with the electrical signals of the standard reference value of the selenium content of the rhizomes in the corresponding growth period reaching a set threshold, and then the irrigation of the grid area is stopped.

4. The ecological fertilization planting method for increasing the selenium content in rice according to claim 3, characterized in that: The remaining selenium-rich microalgae liquid is returned to the culture pool for recycling, and the amount of selenium supplementation in the microalgae culture pool is dynamically controlled, specifically comprising: Detect the selenium content of the remaining microalgae liquid, and calculate the equivalent inorganic selenium content of the remaining microalgae liquid according to the selenium enrichment efficiency of inorganic selenium converted into organic selenium in the microalgae culture pool; The unused microalgae liquid is returned to the microalgae culture pool through the recovery device of the irrigation system, and the supply of selenium-rich water in the microalgae culture pool is adjusted in real time based on the equivalent inorganic selenium content of the remaining microalgae liquid.

5. An ecological fertilization and planting system for increasing the selenium content in rice, used to implement an ecological fertilization and planting method for increasing the selenium content in rice as described in any one of claims 1 to 4, characterized in that: include: A selenium-enriched microalgae cultivation module, wherein the selenium-enriched microalgae cultivation module measures the efficiency of each microalgae in absorbing inorganic selenium and converting it into organic selenium by analyzing the change of organic selenium concentration in the microalgae cells of each microalgae in the cultivation pool, regularly monitors the selenium concentration in the water of the organic selenium source microalgae cultivation pool, and maintains the selenium concentration of the organic selenium source microalgae cultivation pool within the upper and lower ranges set by the Michaelis constant by adjusting the amount of selenium added in the selenium-enriched water; An electric signal reaction pattern library establishment module, wherein the electric signal reaction pattern library establishment module sets a standard reference value of the selenium content of the rhizomes at each growth stage of rice by detecting the vitality of the plant root system, analyzes the mathematical relationship between the selenium content of the rhizomes at each growth stage of rice and the electric signal, performs electric signal analysis on rice samples at each growth stage, identifies the plant electric signal frequency components and the plant electric signal phase offset of the set number of adjacent collected data, and establishes a plant selenium absorption electric signal reaction pattern library; A microalgae liquid application amount adjustment module, which sets the rice field detection grid area, establishes the plant electrical signal characteristics of the rice plants detected in each grid area, brings in the plant selenium absorption electrical signal reaction pattern library to calculate the plant electrical signal characteristic matching degree, obtains the growth stage of the rice plants detected in each grid area and the corresponding plant root and stem selenium content, and plans the irrigation amount of the microalgae liquid in each grid area; The microalgae liquid circulation module calculates the equivalent inorganic selenium content of the remaining microalgae liquid according to the selenium enrichment efficiency of converting inorganic selenium into organic selenium in the microalgae culture pool, and adjusts the supply of selenium-rich water in the microalgae culture pool in real time based on the equivalent inorganic selenium content of the remaining microalgae liquid.

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