Method, system and device for calculating compound fertilization of biogas slurry and chemical fertilizer for rice planting and medium

Abstract

The present application relates to biogas slurry field application technology field, disclose a kind of for rice planting's biogas slurry chemical fertilizer compound fertilization calculation method, system, equipment and medium, the present application is by comprehensive quantification soil basic fertilization ability, biogas slurry nutrient content and rice whole growth period nutrient demand, realize the accurate, balanced matching of biogas slurry and chemical fertilizer, the present application can overcome the defects in the prior art that biogas slurry recommended dosage is extensive, neglects soil nutrient dynamic supply and lacks whole growth period overall planning, effectively avoid fertilizer damage, improve fertilizer utilization efficiency, provide a set of scientific, systematic and strong operability biogas slurry fertilization solution for rice planting, with economic and environmental benefits.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of biogas slurry application, and particularly relates to a calculation method, system, device and medium for biogas slurry and chemical fertilizer compound application in rice planting. BACKGROUND

[0002] As a by-product of biogas engineering, biogas slurry contains not only a large amount of nutrient elements such as nitrogen, phosphorus, potassium and organic matter, but also trace elements such as zinc, copper, iron and calcium, and secondary metabolites such as vitamins, hormones and active enzymes that are beneficial to plant growth, which is a high-quality organic fertilizer resource. Many studies have shown that biogas slurry application can improve soil quality, improve crop quality and achieve yield increase. In production practice, biogas slurry produced by biogas stations can be applied to surrounding fields, facilities, fruit trees and other types of planting systems. In January 2025, the State Administration for Market Regulation issued the Technical Specification for Livestock and Poultry Manure Application, which recommends the application amount of liquid manure including biogas slurry on different crops; before that, many regions have also introduced their own local standards for biogas slurry application to guide local agricultural production using biogas slurry application. However, in actual production, biogas slurry application still faces many problems. For example, the nutrient content of different types of biogas slurry varies greatly, and users have difficulty grasping the reasonable amount of application; in addition, the nutrients in biogas slurry are not balanced, and separate application of biogas slurry not only cannot increase yield, but also may cause fertilizer damage due to excessive use, and usually needs to be compounded with chemical fertilizer to balance nutrient application.

[0003] Rice planting is one of the important places for biogas slurry application. Compared with facility and fruit tree planting, the application of biogas slurry in rice fields has lower requirements for equipment, and is convenient to apply. Biogas slurry can be applied through conventional pipelines with water irrigation, and this method has been widely used in rice production areas from Jiangnan to South China. The Anhui Provincial Local Standard recommends the biogas slurry application amount in rice planting to be between 4.5 tons and 22.5 tons per mu based on the nitrogen content of biogas slurry; similarly, the Jiangsu Provincial Local Standard recommends that biogas slurry can replace 40%-50% of nitrogen for rice planting; the Hubei Provincial Local Standard proposes that biogas slurry can be used as base fertilizer, and the recommended application amount is not more than 20 tons per mu. The above local technical regulations are derived from local production experience and the nitrogen requirement of rice, although they mention the application of chemical fertilizer, they do not provide further explanation, and do not consider the nutrient supply of the soil itself, and the recommended biogas slurry application range is too wide. Some existing methods of biogas slurry and chemical fertilizer compound application only evaluate the soil nutrient supply through soil fertility classification, without considering the effect of straw return on soil nitrogen and potassium supply, and the calculation method is still relatively rough; on the other hand, the chemical fertilizer compound only reflects the supplement of biogas slurry nutrients, without considering the distribution of fertilization during the growth period, and lacks overall fertilization scheme design. SUMMARY

[0004] The application provides a calculation method, system, device and medium for biogas slurry and chemical fertilizer compound fertilization of rice planting, to solve the defects of the prior art.

[0005] The application provides a calculation method for biogas slurry and chemical fertilizer compound fertilization of rice planting, comprising the following steps of:

[0006] obtaining soil data of a target planting area, fertilization data of rice planting, to-be-applied biogas slurry data and planting data of target rice expected to be planted in the target planting area;

[0007] obtaining unit area soil nitrogen supply of the target planting area according to the soil data of the target planting area;

[0008] obtaining unit area pure nitrogen application of the target planting area according to the unit area soil nitrogen supply of the target planting area, the fertilization data of rice planting and the planting data of the target rice;

[0009] obtaining unit area biogas slurry application of the target planting area according to the unit area pure nitrogen application of the target planting area, the fertilization data of rice planting and the to-be-applied biogas slurry data;

[0010] obtaining supplemental nitrogen chemical fertilizer amount of a complete growth period of the target rice according to the unit area pure nitrogen application of the target planting area and the fertilization data of rice planting;

[0011] obtaining unit area soil phosphorus supply and unit area soil potassium supply of the target planting area according to the soil data of the target planting area;

[0012] obtaining unit area phosphorus application and unit area potassium application of the target planting area according to the unit area soil phosphorus supply and the unit area soil potassium supply of the target planting area, the planting data of the target rice and the fertilization data of rice planting;

[0013] obtaining supplemental phosphorus fertilizer amount of the target rice planted in the target planting area according to the unit area phosphorus application of the target planting area and the unit area biogas slurry application and the to-be-applied biogas slurry data;

[0014] obtaining supplemental potassium fertilizer amount of a complete growth period of the target rice planted in the target planting area according to the unit area potassium application of the target planting area and the unit area biogas slurry application, the to-be-applied biogas slurry data and the fertilization data of rice planting.

[0015] The application provides a calculation method for biogas slurry and chemical fertilizer compound fertilization of rice planting,

[0016] The soil data of the target planting area comprises any one or any combination of the following: soil alkali hydrolysis nitrogen content, soil pH value, soil organic matter content, soil available phosphorus content, soil available potassium content, and the like.

[0017] The to-be-applied biogas slurry data include any one or any combination thereof of total nitrogen content, total phosphorus content, and total potassium content.

[0018] The rice planting data include any one or any combination thereof of a type of the target rice, a target yield of the target rice, a nitrogen requirement per hundred kilograms of the target rice yield, a phosphorus requirement per hundred kilograms of the target rice yield, and a potassium requirement per hundred kilograms of the target rice yield.

[0019] The rice planting fertilization data include any one or any combination thereof of nitrogen use efficiency, a proportion of nitrogen fertilizer base fertilizer, phosphorus use efficiency, potassium use efficiency, a previous crop situation, and a biogas slurry replacement fertilizer rate.

[0020] According to the present application, a calculation method for biogas slurry and chemical fertilizer compound fertilization for rice planting is provided, and the unit area soil nitrogen supply amount of a target planting area is obtained according to soil data of the target planting area, including:

[0021] According to the soil data of the target planting area, the unit area soil nitrogen supply amount of the target planting area is obtained by using a first expression and a first constraint condition, wherein the first expression is:

[0022] ,

[0023] In the formula, N S is the unit area soil nitrogen supply amount, unit kg N / acre, AN is the soil alkali hydrolysis nitrogen content, β pH is a soil pH value correction coefficient, SOM is the soil organic matter content, and β Npc is a previous crop correction coefficient.

[0024] The first constraint condition is:

[0025] When SOM-2≤0 in the first expression, SOM-2=0.

[0026] According to the present application, a calculation method for biogas slurry and chemical fertilizer compound fertilization for rice planting is provided, and the unit area soil nitrogen supply amount of a target planting area is obtained according to soil data of the target planting area, including:

[0027] According to the unit area soil nitrogen supply amount of the target planting area, the rice planting fertilization data, and the rice planting data, the unit area application pure nitrogen amount of the target planting area is obtained by using a second expression, wherein the second expression is:

[0028] ,

[0029] In the formula, Nar N is the unit area application pure nitrogen amount, unit kg N / acre r100 Y is the nitrogen amount required for obtaining per hundred kilograms of target rice yield, Y is the target yield of rice planting, N S E is the unit area soil nitrogen supply amount N NUE is the nitrogen utilization efficiency

[0030] A calculation method for biogas liquid fertilizer compound fertilization for rice planting is provided according to the unit area application pure nitrogen amount of the target planting area, the fertilization data of rice planting and the data of biogas liquid to be applied, so as to obtain the unit area biogas liquid application amount of the target planting area, which comprises the following steps:

[0031] According to the unit area application pure nitrogen amount of the target planting area, the fertilization data of rice planting and the data of biogas liquid to be applied, the third expression is used to obtain the unit area biogas liquid application amount of the target planting area, wherein the third expression is:

[0032] ,

[0033] In the formula, V BS N is the unit area biogas liquid application amount, unit ton / acre ar NF is the unit area application pure nitrogen amount b R is the proportion of nitrogen fertilizer base fertilizer N N is the biogas liquid replacement fertilizer rate BS β is the nitrogen content in biogas liquid BS is the biogas liquid amount correction coefficient.

[0034] A calculation method for biogas liquid fertilizer compound fertilization for rice planting is provided according to the unit area application pure nitrogen amount of the target planting area and the fertilization data of rice planting, so as to obtain the complete growth period of the target rice. The amount of supplementary nitrogen fertilizer, comprising the following steps:

[0035] According to the unit area application pure nitrogen amount of the target planting area and the fertilization data of rice planting, the fourth expression, the fifth expression and the sixth expression are used to obtain the base fertilizer urea application amount, the tillering period urea application amount and the ear fertilizer urea application amount, wherein the fourth expression is:

[0036] ,

[0037] The fifth expression is:

[0038] ,

[0039] The sixth expression is:

[0040] ,

[0041] In the formula, UR b is the base fertilizer urea application amount, UR t is the tillering stage urea application amount, URs is the ear fertilizer urea application amount, N ar is the pure nitrogen application amount per unit area, NF b is the proportion of nitrogen fertilizer base fertilizer, R N is the biogas slurry replacement fertilizer rate.

[0042] According to the application, a calculation method for biogas slurry and chemical fertilizer compound fertilization for rice planting is provided, and the soil data of a target planting area is obtained to obtain the soil phosphorus supply per unit area and the soil potassium supply per unit area of the target planting area, including:

[0043] According to the soil data of the target planting area, the seventh expression and the eighth expression are used to obtain the soil phosphorus supply per unit area and the soil potassium supply per unit area of the target planting area, wherein the seventh expression is:

[0044] ,

[0045] The eighth expression is:

[0046] ,

[0047] In the formula, P S is the soil phosphorus supply per unit area, unit kg P2O5 / acre, AP is the soil available phosphorus content, K S is the soil potassium supply per unit area, unit kg K2O / acre, AK is the soil available potassium content.

[0048] According to the application, a calculation method for biogas slurry and chemical fertilizer compound fertilization for rice planting is provided, and the soil data of a target planting area is obtained to obtain the soil phosphorus supply per unit area and the soil potassium supply per unit area of the target planting area, including:

[0049] According to the soil data of the target planting area, the seventh expression and the eighth expression are used to obtain the soil phosphorus supply per unit area and the soil potassium supply per unit area of the target planting area, wherein the seventh expression is:

[0050] ,

[0051] The tenth expression is:

[0052] ,

[0053] In the formula, P arP is the amount of phosphorus applied per unit area, in kg P2O5 / acre, P r100 P is the amount of phosphorus required per 100 kg of target rice yield, P S E is the soil phosphorus supply per unit area, E P K is the phosphorus utilization efficiency, K ar K is the amount of potassium applied per unit area, in kg K2O / acre, K r100 K is the amount of potassium required per 100 kg of target rice yield, K S E is the soil potassium supply per unit area, E K β is the potassium utilization efficiency, β Kst Y is the straw return correction coefficient, Y is the target yield of rice planting.

[0054] According to the application, a calculation method for biogas liquid fertilizer compound fertilization for rice planting is provided, which obtains the amount of supplementary phosphorus fertilizer for planting target rice in the target planting area according to the amount of phosphorus applied per unit area and the amount of biogas liquid applied per unit area in the target planting area and the data of biogas liquid to be applied, and comprises the following steps:

[0055] According to the amount of phosphorus applied per unit area and the amount of biogas liquid applied per unit area in the target planting area and the data of biogas liquid to be applied, the amount of supplementary phosphorus fertilizer for planting target rice in the target planting area is obtained by using the eleventh expression and the second constraint condition, wherein the eleventh expression is:

[0056] ,

[0057] In the formula, CS b P is the amount of supplementary phosphorus fertilizer (the amount of calcium superphosphate applied), P ar V is the amount of phosphorus applied per unit area, V BS P is the amount of biogas liquid applied per unit area, P BS P is the phosphorus content in biogas liquid;

[0058] The second constraint condition is:

[0059] When P ar ≤V BS ×P BS ×1000 in the eleventh expression, the amount of supplementary phosphorus fertilizer is 0.

[0060] According to the application, a calculation method for biogas liquid fertilizer compound fertilization for rice planting is provided, which obtains the amount of supplementary potassium fertilizer for the complete growth period of target rice planted in the target planting area according to the amount of potassium applied per unit area and the amount of biogas liquid applied per unit area in the target planting area and the data of biogas liquid to be applied and the fertilization data of rice planting, and comprises the following steps:

[0061] Based on the potassium application rate per unit area and the biogas slurry application rate per unit area in the target planting area, as well as the biogas slurry data to be applied and the fertilization data for rice cultivation, the supplementary potassium fertilizer amount for the entire growth period of the target rice in the target planting area is obtained using the twelfth expression and the third constraint. The twelfth expression is:

[0062] ,

[0063] ,

[0064] In the formula, KC b K represents the amount of potassium chloride applied as base fertilizer, KCs represents the amount of potassium chloride applied as top dressing, and K represents the amount of potassium chloride applied as top dressing. ar Potassium application rate per unit area, KF b V represents the proportion of potassium fertilizer as a base fertilizer. BS K is the amount of biogas slurry applied per unit area. BS Potassium content in biogas slurry;

[0065] The third constraint is:

[0066] When K in the twelfth expression ar ≤V BS ×K BS When ×1000, the amount of potassium fertilizer supplemented during the complete growth period of the target rice in the target planting area is 0, and when K in the twelfth expression... ar × K Fb ≤ V BS × K BS ×1000≤ K ar At that time, KC b =0, the KCs formula is modified as follows:

[0067] ,

[0068] In the formula, KCs' is the amount of potassium chloride applied as top dressing, and K ar V is the amount of potassium applied per unit area. BS K is the amount of biogas slurry applied per unit area. BS This refers to the potassium content in the biogas slurry.

[0069] This invention also provides a calculation system for compound fertilization of biogas slurry fertilizer in rice cultivation, comprising:

[0070] The data acquisition module is used to: acquire soil data of the target planting area, fertilization data of rice planting, biogas slurry data to be applied, and planting data of the target rice to be planted in the target planting area;

[0071] The module for obtaining soil nitrogen supply per unit area is used to: obtain the soil nitrogen supply per unit area of ​​the target planting area based on soil data of the target planting area;

[0072] The unit area application pure nitrogen amount obtaining module is configured to obtain the unit area application pure nitrogen amount of the target planting area according to the unit area soil nitrogen supply amount of the target planting area, the fertilization data of the rice planting, and the planting data of the target rice.

[0073] The unit area biogas slurry application amount obtaining module is configured to obtain the unit area biogas slurry application amount of the target planting area according to the unit area application pure nitrogen amount of the target planting area, the fertilization data of the rice planting, and the to-be-applied biogas slurry data.

[0074] The supplementary nitrogen fertilizer amount obtaining module is configured to obtain the supplementary nitrogen fertilizer amount of the target rice during the complete growth period according to the unit area application pure nitrogen amount of the target planting area and the fertilization data of the rice planting.

[0075] The unit area soil phosphorus / potassium supply amount obtaining module is configured to obtain the unit area soil phosphorus supply amount and the unit area soil potassium supply amount of the target planting area according to the soil data of the target planting area.

[0076] The unit area phosphorus / potassium application amount obtaining module is configured to obtain the unit area phosphorus application amount and the unit area potassium application amount of the target planting area according to the unit area soil phosphorus supply amount and the unit area soil potassium supply amount of the target planting area, and the planting data of the target rice and the fertilization data of the rice planting.

[0077] The supplementary phosphorus fertilizer amount obtaining module is configured to obtain the supplementary phosphorus fertilizer amount for planting the target rice in the target planting area according to the unit area phosphorus application amount and the unit area biogas slurry application amount of the target planting area, and the to-be-applied biogas slurry data.

[0078] The supplementary potassium fertilizer amount obtaining module is configured to obtain the supplementary potassium fertilizer amount for planting the target rice in the target planting area during the complete growth period according to the unit area potassium application amount and the unit area biogas slurry application amount of the target planting area, the to-be-applied biogas slurry data, and the fertilization data of the rice planting.

[0079] The application further provides an electronic device including a processor and a memory storing a computer program, and the processor implements the above-mentioned any one of the calculation methods for biogas slurry and chemical fertilizer compound fertilization for rice planting when executing the computer program.

[0080] The application further provides a non-transitory computer readable storage medium storing a computer program, and the computer program implements the above-mentioned any one of the calculation methods for biogas slurry and chemical fertilizer compound fertilization for rice planting when executed by a processor.

[0081] The application further provides a computer program product, which comprises a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and the computer program can be executed by a processor to enable a computer to execute the calculation method for biogas slurry and chemical fertilizer compound fertilization in rice planting.

[0082] The application provides a calculation method, system, device and medium for biogas slurry and chemical fertilizer compound fertilization in rice planting, which has at least the following beneficial effects:

[0083] The application realizes quantitative evaluation of soil nitrogen, phosphorus and potassium supply capacity by comprehensively obtaining soil data, biogas slurry characteristics and rice planting requirements of the target planting area, and overcomes the limitations of only relying on soil fertility classification or rough estimation in the prior art. In particular, by quantifying the influence of straw returning on soil nutrient supply, the accuracy and scientificity of biogas slurry and chemical fertilizer compound fertilization are significantly improved.

[0084] The application dynamically determines the chemical fertilizer supplement amount at different growth stages by calculating the fertilizer requirement amount and biogas slurry nutrient contribution amount of nitrogen, phosphorus and potassium respectively, to ensure balanced nutrient supply during the whole growth period of rice. Not only can the nutrient imbalance or fertilizer damage problem caused by single application of biogas slurry be avoided, but also a customized fertilization scheme can be generated according to the soil conditions and crop requirements of the specific field.

[0085] The application provides a complete method from data input to fertilizer amount calculation, which can be integrated into a calculation system, device or medium for direct application by farmers or agricultural technicians. Through a standardized calculation process, the problem of wide range of biogas slurry usage in existing local standards and lack of specific compound fertilization guidance is solved, and the application is suitable for planting scenarios of different regions, different soil types and different rice varieties.

[0086] The application optimizes the compound fertilization ratio of biogas slurry and chemical fertilizer, fully utilizes the organic fertilizer effect of biogas slurry, reduces the excessive use of chemical fertilizer, reduces the risk of agricultural non-point source pollution, and meets the requirements of green agriculture and sustainable development. At the same time, the efficiency of biogas slurry resource utilization is improved, and the development of circular agriculture is supported.

[0087] The application not only focuses on the compound fertilization of biogas slurry and chemical fertilizer at the base fertilizer stage, but also considers the nutrient demand and distribution during the whole growth period of rice, forms a systematic fertilization scheme, and makes up for the defects of "only supplement, not overall planning" in the prior art, which helps to realize the unity of high yield, high quality and economic efficiency of fertilization. BRIEF DESCRIPTION OF DRAWINGS

[0088] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0089] Figure 1 A flowchart of a calculation method for biogas liquid and chemical fertilizer compound fertilization for rice planting provided by the present application.

[0090] Figure 2 A structural diagram of a calculation system for biogas liquid and chemical fertilizer compound fertilization for rice planting provided by the present application.

[0091] Figure 3 A structural diagram of an electronic device provided by the present application. DETAILED DESCRIPTION

[0092] In order to make the objectives, technical solutions and advantages of the present application clearer, the following will combine the drawings in the present application to clearly and completely describe the technical solutions in the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments, and they should not be understood as a limitation on the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort fall within the scope of protection of the present application. In the description of the present application, it should be understood that the terms used are only for the purpose of description, and should not be understood as indicating or implying relative importance.

[0093] Figure 1 A flowchart of a calculation method for biogas liquid and chemical fertilizer compound fertilization for rice planting provided by the present application. The execution subject of the calculation method for biogas liquid and chemical fertilizer compound fertilization for rice planting provided by the present application can be any applicable terminal-side device or network-side device, such as a calculation device for biogas liquid and chemical fertilizer compound fertilization for rice planting, etc.

[0094] Referring to Figure 1 The calculation method for biogas liquid and chemical fertilizer compound fertilization for rice planting provided by the present application can include:

[0095] S110, obtaining soil data of a target planting area, fertilization data of rice planting, to-be-applied biogas liquid data, and planting data of target rice expected to be planted in the target planting area.

[0096] In an embodiment, before rice planting, after the previous crop is harvested, the soil data of the target planting area, the data of the biogas slurry to be applied, and the planting data of the target rice to be planted in the target planting area can be collected, for example, 0-20 cm soil is collected at at least 5 points in the target planting area and mixed thoroughly for soil data determination, and 500 ml of fresh biogas slurry from the biogas station is collected for biogas slurry data determination.

[0097] Specifically, the soil data of the target planting area includes any one or any combination thereof of the following: soil alkali hydrolysis nitrogen content, soil pH value, soil organic matter content, soil available phosphorus content, and soil available potassium content. The data of the biogas slurry to be applied includes any one or any combination thereof of the following: total nitrogen content, total phosphorus content, and total potassium content. The planting data of the target rice includes any one or any combination thereof of the following: type of the target rice (for example, single-crop rice, early rice, late rice, hybrid single-crop rice, hybrid early rice, hybrid late rice), nitrogen requirement per 100 kg of target rice yield, planting target yield of the target rice, phosphorus requirement per 100 kg of target rice yield, and potassium requirement per 100 kg of target rice yield. The fertilization data of the rice planting includes any one or any combination thereof of the following: nitrogen use efficiency, proportion of nitrogen fertilizer base fertilizer, phosphorus use efficiency, potassium use efficiency, previous crop situation, and biogas slurry replacement rate of chemical fertilizer.

[0098] S120, according to the soil data of the target planting area, using a first expression and a first constraint condition, the soil nitrogen supply per unit area of the target planting area is obtained. This embodiment considers that the nitrogen-phosphorus ratio in the biogas slurry is higher than the nitrogen-phosphorus ratio absorbed by the crops, and therefore the nitrogen is quantified when calculating the amount of biogas slurry. In the calculation of the soil nitrogen supply, in addition to the nitrogen content in the soil itself, the influence of the soil pH, the influence of the mineralization of the soil organic matter, and the influence of the previous crop are also considered, and various factors are comprehensively considered.

[0099] wherein the first expression is:

[0100] ,

[0101] In the formula, N S is the soil nitrogen supply per unit area, in kg N / acre, AN is the soil alkali hydrolysis nitrogen content, β pH is the soil pH correction coefficient, when the soil pH is 5.5 ≤ pH ≤ 8.5, β pH = 1, and outside this range, β pH = 0.75, SOM is the soil organic matter content, β Npc is the previous crop correction coefficient, when the previous crop is Gramineae and is returned to the field, β Npc = 0.8, and when the previous crop is Leguminosae, β Npc= 1.2, except for the above cases, β Npc = 1.0.

[0102] The first constraint condition is:

[0103] When SOM-2 in the first expression is less than or equal to 0, SOM-2 = 0;

[0104] S130, according to the unit area soil nitrogen supply of the target planting area, the fertilization data of rice planting and the planting data of the target rice, the second expression is used to obtain the unit area application of pure nitrogen of the target planting area, wherein the second expression is:

[0105] ,

[0106] In the formula, N ar is the unit area application of pure nitrogen, unit kg N / acre, N r100 is the nitrogen requirement per hundred kilograms of target rice yield, which varies according to the type of rice planting, see Table 1 for details, Y is the planting target yield of the target rice, which ranges from 300 to 750, and can be determined according to the average yield of local rice, N S is the unit area soil nitrogen supply, E N is the nitrogen use efficiency, which ranges from 35% to 45%.

[0107] Table 1 Nitrogen, phosphorus and potassium nutrients required per hundred kilograms of rice

[0108]

[0109] S140, according to the unit area application of pure nitrogen of the target planting area, the fertilization data of rice planting and the to-be-applied biogas liquid data, the third expression is used to obtain the unit area biogas liquid application amount of the target planting area. In this embodiment, biogas liquid is preferably used as base fertilizer, which is applied after the harvest of the previous crop, and the influence of whether the straw is returned to the field on nitrogen utilization is also considered.

[0110] Wherein, the third expression is:

[0111] ,

[0112] In the formula, V BS is the unit area biogas liquid application amount, unit ton / acre, N ar is the unit area application of pure nitrogen, NF b is the proportion of nitrogen fertilizer base fertilizer, which ranges from 40% to 50%, R N is the biogas liquid replacement rate of chemical fertilizer, 0 ≤ R N ≤ 80%, the recommended range is 30% to 70%, N BS is the nitrogen content in biogas liquid, βBS is a correction coefficient for biogas slurry usage, when the straw of the previous crop is returned to the field, β BS = 0.60, and when there is no straw returned to the field, β BS = 0.85.

[0113] S150, according to the unit area application amount of pure nitrogen of the target planting area and the fertilization data of rice planting, the fourth expression, the fifth expression and the sixth expression are used to obtain the base fertilizer urea application amount, the tillering period urea application amount and the panicle fertilizer urea application amount. In the embodiment, the nitrogen fertilizer is preferably urea, and the topdressing is carried out at the tillering period and the heading period, accounting for 55% and 45% respectively.

[0114] The fourth expression is:

[0115] ,

[0116] The fifth expression is:

[0117] ,

[0118] The sixth expression is:

[0119] ,

[0120] In the formula, UR b is the base fertilizer urea application amount, UR t is the tillering period urea application amount, and URs is the panicle fertilizer urea application amount, N ar is the unit area application amount of pure nitrogen, NF b is the proportion of nitrogen fertilizer base fertilizer, R N is the biogas slurry replacement rate of chemical fertilizer, N ar , NF b , R N The numerical values are the same as those in step S140.

[0121] S160, according to the soil data of the target planting area, the seventh expression and the eighth expression are used to obtain the unit area soil phosphorus supply amount and the unit area soil potassium supply amount of the target planting area. The seventh expression is:

[0122] ,

[0123] The eighth expression is:

[0124] ,

[0125] In the formula, P S is the unit area soil phosphorus supply amount, unit kg P2O5 / acre, and AP is the soil available phosphorus content, K SAK is the soil available potassium content, unit kg K2O / acre.

[0126] S170、According to the unit area soil available phosphorus content and the unit area soil available potassium content of the target planting area, and the planting data of the target rice and the fertilization data of the rice planting, the unit area phosphorus (P2O5) application amount and the unit area potassium (K2O) application amount of the target planting area are obtained by using the ninth expression and the tenth expression, wherein the ninth expression is:

[0127] ,

[0128] The tenth expression is:

[0129] ,

[0130] In the formula, P ar is the unit area phosphorus application amount, unit kg P2O5 / acre, P r100 is the phosphorus requirement per hundred kilograms of target rice yield, P S is the unit area soil available phosphorus content, E P is the phosphorus utilization efficiency, which ranges from 50% to 60%, K ar is the unit area potassium application amount, unit kg K2O / acre, K r100 is the potassium requirement per hundred kilograms of target rice yield, K S is the unit area soil available potassium content, E K is the potassium utilization efficiency, which ranges from 50% to 60%, β Kst is the straw return correction coefficient, when the current crop is rice and the straw is returned, β Kst = 0.7, and when there is no straw return, β Kst = 1.0, Y is the target yield of rice planting, which ranges from 300 to 750, P r100 and K r100 differ according to the type of rice planting, as shown in Table 1.

[0131] S180、According to the unit area phosphorus application amount and the unit area biogas slurry application amount of the target planting area, and the to-be-applied biogas slurry data, the supplementary phosphorus fertilizer amount for planting the target rice in the target planting area is obtained by using the eleventh expression and the second constraint condition. In this embodiment, the phosphorus fertilizer is preferentially used as calcium superphosphate, which is applied as base fertilizer at one time.

[0132] The eleventh expression is:

[0133] ,

[0134] In the formula, CS b is the supplementary phosphorus fertilizer amount (calcium superphosphate application amount), Par V is the unit area phosphorus application amount, and P is the unit area biogas slurry application amount BS V is the unit area phosphorus application amount, and P is the unit area biogas slurry application amount BS P is the phosphorus content in the biogas slurry;

[0135] The second constraint condition is:

[0136] When P ar ≤V BS ×P BS ×1000 in the eleventh expression, it means that the amount of phosphorus brought in by the biogas slurry is higher than the required amount of phosphorus fertilizer, that is, CS b ≤ 0, then no additional phosphorus fertilizer is needed, and the amount of phosphorus fertilizer to be supplemented is 0.

[0137] S190, according to the unit area potassium application amount and the unit area biogas slurry application amount of the target planting area, and the biogas slurry data to be applied and the fertilization data of rice planting, the twelfth expression and the third constraint condition are used to obtain the amount of supplementary potassium fertilizer in the complete growth period of the target rice planted in the target planting area. The potassium fertilizer of the embodiment is preferably potassium chloride, which is used as base fertilizer and ear fertilizer.

[0138] The twelfth expression is:

[0139] ,

[0140] ,

[0141] In the formula, KC b is the potassium chloride base fertilizer application amount, Kcis the potassium chloride ear fertilizer application amount, K ar is the unit area potassium application amount, KF b is the proportion of potassium fertilizer base fertilizer, which is in the range of 50% ~ 60%, V BS is the unit area biogas slurry application amount, K BS is the potassium content in the biogas slurry;

[0142] The third constraint condition is:

[0143] Before calculation, the size relationship between the amount of potassium brought in by the biogas slurry and the amount of potassium to be applied needs to be determined. When K ar × K Fb ≥ V BS × K BS × 1000, the twelfth expression can be used for calculation; when K ar ≤V BS ×K BS ×1000 in the twelfth expression, the amount of supplementary potassium fertilizer in the complete growth period of the target rice planted in the target planting area is 0; when K ar × K Fb ≤V BS × KBS x 1000 ≤ K ar when KC b = 0, the formula of KCs is modified as:

[0144] ,

[0145] wherein KCs' is the application amount of potassium chloride cluster fertilizer, K ar is the application amount of potassium per unit area, V BS is the application amount of biogas slurry per unit area, K BS is the potassium content in the biogas slurry.

[0146] The following provides a specific application example to illustrate the calculation method of the biogas slurry and chemical fertilizer compound fertilization for rice planting provided by the present application.

[0147] Rice is planted in a certain place in South China, and biogas slurry from a nearby pig farm biogas station is used as base fertilizer to replace part of chemical fertilizer. After the early rice is harvested, the physicochemical properties of the paddy soil are measured as follows: alkaline hydrolysis nitrogen 140 mg / kg, organic matter 3.51%, available phosphorus 24.97 mg / kg, available potassium 48.32 mg / kg, and pH 5.62; at the same time, the test results of the sampled biogas slurry are as follows: total nitrogen 0.113%, total phosphorus 0.050%, and total potassium 0.066%. The rice variety to be planted is Xiangzhuxiangsima, which is a conventional late rice; the annual yield is 400-500 kg, so the target yield is set to 500 kg per mu (Y). The previous crop is early rice, and the straw is fully returned to the field. According to the soil physicochemical properties, the soil nitrogen supply is calculated to be 5.74 kg N / mu (N S ). The nitrogen utilization rate is set to 40% (E N ), the proportion of nitrogen base fertilizer is set to 50% (NF b ), and the replacement rate of biogas slurry for chemical fertilizer is set to 60% (R N ). The calculated biogas slurry return amount is 5.65 tons / mu (V BS ), and the base fertilizer needs to supplement urea 6.95 kg / mu (UR b ). According to the ratio of nitrogen base fertilizer to topdressing and the proportion of nitrogen fertilizer in the tillering stage and the heading stage, it is calculated that urea 7.46 kg / mu (UR t ) is needed in the tillering stage, and 6.25 kg / mu (URs) is needed in the heading stage. According to the soil available phosphorus and available potassium content in this area, the soil phosphorus supply is calculated to be 0.599 kg / mu (P S ), and the soil potassium supply is 7.24 kg / mu (K S ). Further combined with the phosphorus requirement and potassium requirement of rice, the calculated phosphorus application amount is 5.27 kg / mu (P ar ), and the calculated potassium application amount is 11.23 kg / mu (K ar). According to the calculation of the amount of biogas slurry returned to the field, the phosphorus and potassium brought in are 2.82 kg / mu and 3.72 kg / mu respectively, and it is calculated that 20.4 kg / mu of calcium superphosphate (CS b ) is needed to supplement the base fertilizer at one time. It is set that the proportion of potassium fertilizer between base fertilizer and ear fertilizer is 60% (KF b ) and 40% respectively, and it is calculated that 5.03 kg / mu of potassium chloride (KC b ) is needed to supplement the base fertilizer, and 7.49 kg / mu of potassium chloride (KCs) is needed to be applied to the ear fertilizer.

[0148] The present application aims at four factors of soil physicochemical properties (such as soil alkali nitrogen content, organic matter content, available phosphorus content, available potassium content and pH value) in selected rice planting area, planting history (such as rice previous crop type, straw returning situation), biogas slurry nutrients to be applied (such as total nitrogen content, total phosphorus content and total potassium content) and rice type, according to the principle of nitrogen quantification and phosphorus and potassium supplementation, a set of biogas slurry as base fertilizer, chemical fertilizer supplementation, covering the precise compound calculation model of chemical fertilizer for rice tillering stage and heading stage is constructed. By applying the calculation method of the present application, a whole set of scientific fertilization scheme of biogas slurry returning and chemical fertilizer compound for rice growth period can be formed for specific area, which can guide the planting users to reasonably, efficiently and accurately apply biogas slurry, save chemical fertilizer input, avoid nutrient waste and promote regional planting and breeding cycle.

[0149] The calculation system for biogas slurry and chemical fertilizer compound fertilization for rice planting provided by the present application is described below, and the calculation system for biogas slurry and chemical fertilizer compound fertilization for rice planting described below can be correspondingly referred to the calculation method for biogas slurry and chemical fertilizer compound fertilization for rice planting described above.

[0150] Referring to Figure 2 , the calculation system for biogas slurry and chemical fertilizer compound fertilization for rice planting provided by the present application can include:

[0151] The data acquisition module is used to acquire soil data of the target planting area, fertilization data of rice planting, biogas slurry data to be applied and planting data of target rice expected to be planted in the target planting area.

[0152] The unit area soil nitrogen supply amount obtaining module is used to obtain the unit area soil nitrogen supply amount of the target planting area according to the soil data of the target planting area.

[0153] The unit area pure nitrogen application amount obtaining module is used to obtain the unit area pure nitrogen application amount of the target planting area according to the unit area soil nitrogen supply amount of the target planting area, the fertilization data of rice planting and the planting data of the target rice.

[0154] The unit area biogas slurry application amount obtaining module is configured to obtain the unit area biogas slurry application amount of the target planting area according to the unit area pure nitrogen application amount of the target planting area, the fertilization data of the rice planting, and the to-be-applied biogas slurry data.

[0155] The supplementary nitrogen fertilizer amount obtaining module is configured to obtain the supplementary nitrogen fertilizer amount of the target rice during the complete growth period according to the unit area pure nitrogen application amount of the target planting area and the fertilization data of the rice planting.

[0156] The unit area soil phosphorus / potassium supply amount obtaining module is configured to obtain the unit area soil phosphorus supply amount and the unit area soil potassium supply amount of the target planting area according to the soil data of the target planting area.

[0157] The unit area phosphorus / potassium application amount obtaining module is configured to obtain the unit area phosphorus application amount and the unit area potassium application amount of the target planting area according to the unit area soil phosphorus supply amount and the unit area soil potassium supply amount of the target planting area, and the planting data of the target rice and the fertilization data of the rice planting.

[0158] The supplementary phosphorus fertilizer amount obtaining module is configured to obtain the supplementary phosphorus fertilizer amount of the target rice planted in the target planting area according to the unit area phosphorus application amount and the unit area biogas slurry application amount of the target planting area, and the to-be-applied biogas slurry data.

[0159] The supplementary potassium fertilizer amount obtaining module is configured to obtain the supplementary potassium fertilizer amount of the target rice planted in the target planting area during the complete growth period according to the unit area potassium application amount and the unit area biogas slurry application amount of the target planting area, and the to-be-applied biogas slurry data and the fertilization data of the rice planting.

[0160] Figure 3 An example of an entity structure diagram of an electronic device is shown in FIG. 8. Figure 3 As shown in FIG. 8, the electronic device can include a processor 810, a communications interface 820, a memory 830, and a communications bus 840, wherein the processor 810, the communications interface 820, and the memory 830 complete mutual communication through the communications bus 840. The processor 810 can invoke the logical instructions in the memory 830 to execute the steps of the above-mentioned computing method for biogas slurry and fertilizer compounding fertilization of rice planting.

[0161] In addition, the logic instructions in the memory 830 described above can be implemented in the form of software function units and sold or used as independent products, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0162] In another aspect, the present application also provides a computer program product, which comprises a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and the computer program can be executed by a processor to enable a computer to execute the steps of the above-mentioned computing method for compound application of biogas liquid and chemical fertilizer for rice planting.

[0163] In another aspect, the present application also provides a non-transitory computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the steps of the above-mentioned computing method for compound application of biogas liquid and chemical fertilizer for rice planting.

[0164] The device embodiments described above are only schematic, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., they can be located in one place, or distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the present embodiment. Those skilled in the art can understand and implement without creative labor.

[0165] From the above description of the embodiments, those skilled in the art can clearly understand that the embodiments can be implemented by means of software and the necessary general hardware platform, and of course can also be implemented by hardware. Based on such understanding, the above technical solutions essentially or the parts that contribute to the prior art can be embodied in the form of a software product. The computer software product can be stored in a computer readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments.

[0166] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features therein can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A computing method for biogas liquid fertilizer compound fertilization of rice planting, characterized in that, The method comprises the following steps: obtaining soil data of a target planting area, fertilization data of rice planting, to-be-applied biogas slurry data, and planting data of a target rice expected to be planted in the target planting area; obtaining unit-area soil nitrogen supply of the target planting area according to the soil data of the target planting area; obtaining unit-area pure nitrogen application of the target planting area according to the unit-area soil nitrogen supply of the target planting area, the fertilization data of rice planting, and the planting data of the target rice; obtaining unit-area biogas slurry application of the target planting area according to the unit-area pure nitrogen application of the target planting area, the fertilization data of rice planting, and the to-be-applied biogas slurry data; obtaining supplemental nitrogen fertilizer amount of the target rice during a complete growth period according to the unit-area pure nitrogen application of the target planting area and the fertilization data of rice planting; obtaining unit-area soil phosphorus supply and unit-area soil potassium supply of the target planting area according to the soil data of the target planting area; obtaining unit-area phosphorus application and unit-area potassium application of the target planting area according to the unit-area soil phosphorus supply and the unit-area soil potassium supply of the target planting area, the planting data of the target rice, and the fertilization data of rice planting; obtaining supplemental phosphorus fertilizer amount for planting the target rice in the target planting area according to the unit-area phosphorus application of the target planting area and the unit-area biogas slurry application, and the to-be-applied biogas slurry data; obtaining supplemental potassium fertilizer amount for planting the target rice in the target planting area during a complete growth period according to the unit-area potassium application of the target planting area and the unit-area biogas slurry application, and the to-be-applied biogas slurry data and the fertilization data of rice planting; wherein the soil data of the target planting area comprises any one or any combination of the following: soil alkali hydrolysis nitrogen content, soil pH value, soil organic matter content, soil available phosphorus content, and soil available potassium content; the to-be-applied biogas slurry data comprises any one or any combination of the following: total nitrogen content, total phosphorus content, and total potassium content; the planting data of the target rice comprises any one or any combination of the following: type of the target rice, planting target yield of the target rice, nitrogen requirement per hundred kilograms of target rice yield, phosphorus requirement per hundred kilograms of target rice yield, and potassium requirement per hundred kilograms of target rice yield; the fertilization data of rice planting comprises any one or any combination of the following: nitrogen utilization efficiency, proportion of nitrogen fertilizer base fertilizer, phosphorus utilization efficiency, potassium utilization efficiency, previous crop situation, and biogas slurry replacement fertilizer rate; wherein the unit-area soil nitrogen supply of the target planting area is obtained according to the soil data of the target planting area, comprising: the unit-area soil nitrogen supply of the target planting area is obtained according to the soil data of the target planting area by using a first expression and a first constraint condition, wherein the first expression is: ， where N S is the amount of nitrogen supplied per unit area of soil, in kg N / acre, AN is the soil alkali-hydrolyzable nitrogen content, β pH is the soil pH value correction coefficient, SOM is the soil organic matter content, β Npc is the previous crop correction coefficient; the first constraint condition is: when SOM-2≤0 in the first expression, SOM-2=0; and the unit-area pure nitrogen application of the target planting area is obtained according to the unit-area soil nitrogen supply of the target planting area, the fertilization data of rice planting, and the planting data of the target rice, comprising: Based on the soil nitrogen supply per unit area of ​​the target planting area, fertilization data for rice cultivation, and planting data of the target rice, the amount of pure nitrogen applied per unit area of ​​the target planting area is obtained using the second expression, whereby: ， wherein N ar is the amount of pure nitrogen applied per unit area, in kg N / acre, N r100 is the amount of nitrogen required to obtain 100 kg of target rice yield, Y is the target yield of the rice to be planted, N S is the amount of nitrogen supplied per unit area of soil, E N is the nitrogen use efficiency; The step of obtaining the biogas slurry application rate per unit area of ​​the target planting area based on the pure nitrogen application rate per unit area of ​​the target planting area, fertilization data for rice planting, and biogas slurry application data includes: Based on the amount of pure nitrogen applied per unit area in the target planting area, fertilization data for rice cultivation, and data on the amount of biogas slurry to be applied, the amount of biogas slurry applied per unit area in the target planting area is obtained using the third expression, where the third expression is: ， In the formula, V BS is the application amount of biogas slurry per unit area, unit tons / acre, N ar is the application amount of pure nitrogen per unit area, NF b is the proportion of nitrogen fertilizer base fertilizer, R N is the replacement rate of chemical fertilizer by biogas slurry, N BS is the nitrogen content in biogas slurry, β BS is the correction coefficient of biogas slurry amount.

2. The computing method for biogas liquid fertilizer compound fertilization of rice planting according to claim 1, characterized in that, The method of obtaining the supplemental nitrogen fertilizer amount for the entire growth period of the target rice based on the amount of pure nitrogen applied per unit area of ​​the target planting area and the fertilization data of rice cultivation includes: Based on the amount of pure nitrogen applied per unit area in the target planting area and the fertilization data for rice cultivation, the application rates of urea as basal fertilizer, urea during the tillering stage, and urea during the panicle stage are obtained using the fourth, fifth, and sixth expressions. The fourth expression is as follows: ， The fifth expression is: ， The sixth expression is: ， In the formula, UR b is the base fertilizer urea application amount, UR t is the tillering stage urea application amount, URs is the ear fertilizer urea application amount, N ar is the pure nitrogen application amount per unit area, NF b is the proportion of nitrogen fertilizer base fertilizer, R N is the biogas slurry replacement rate of chemical fertilizer.

3. The computing method for biogas liquid fertilizer compound fertilization of rice planting according to claim 2, characterized in that, The step of obtaining the phosphorus supply per unit area and potassium supply per unit area of ​​soil in the target planting area based on soil data includes: Based on soil data from the target planting area, the phosphorus and potassium supply per unit area of ​​soil in the target planting area are obtained using expressions seven and eight. Expression seven is as follows: ， The eighth expression is: ， where P S is the amount of phosphorus supplied per unit area of soil, in kg P205 / acre, AP is the soil available phosphorus content, K S is the amount of potassium supplied per unit area of soil, in kg K20 / acre, AK is the soil available potassium content; Furthermore, the step of obtaining the phosphorus and potassium application rates per unit area of ​​the target planting area based on the soil phosphorus and potassium supply per unit area of ​​the target planting area, as well as the planting data and fertilization data of the target rice, includes: Based on the phosphorus and potassium supply per unit area of ​​soil in the target planting area, as well as the planting data and fertilization data for the target rice, the phosphorus and potassium application rates per unit area of ​​the target planting area are obtained using expressions nine and ten. Expression nine is as follows: ， The tenth expression is: ， wherein P ar is the amount of phosphorus applied per unit area, in kg P205 / acre, P r100 is the amount of phosphorus required to obtain 100 kg of target rice yield, P S is the amount of phosphorus supplied by the soil per unit area, E P is the phosphorus use efficiency, K ar is the amount of potassium applied per unit area, in kg K20 / acre, K r100 is the amount of potassium required to obtain 100 kg of target rice yield, K S is the amount of potassium supplied by the soil per unit area, E K is the potassium use efficiency, β Kst is the correction coefficient for straw returning to the field, Y is the target yield of rice cultivation.

4. The computing method for biogas liquid fertilizer compound fertilization of rice planting according to claim 3, characterized in that, The method of obtaining the supplementary phosphorus fertilizer amount for planting the target rice in the target planting area based on the phosphorus application rate per unit area, the biogas slurry application rate per unit area, and the biogas slurry data to be applied includes: Based on the phosphorus application rate per unit area and the biogas slurry application rate per unit area in the target planting area, as well as the biogas slurry data to be applied, the supplementary phosphorus fertilizer amount for planting the target rice in the target planting area is obtained using the eleventh expression and the second constraint. The eleventh expression is as follows: ， In the formula, CS b P is the amount of phosphorus fertilizer ar V is the amount of phosphorus applied per unit area BS P is the amount of biogas slurry applied per unit area BS P is the phosphorus content in the biogas slurry The second constraint is: When the eleventh expression P ar ≤ V BS x P BS x 1000, the supplemental phosphorus fertilizer amount is 0; Furthermore, the step of obtaining the supplemental potassium fertilizer amount for the entire growth period of the target rice in the target planting area based on the potassium application rate per unit area, the biogas slurry application rate per unit area, the biogas slurry data to be applied, and the fertilization data for rice planting, includes: According to the unit area potassium application amount and the unit area biogas slurry application amount of the target planting area, and the biogas slurry data to be applied and the fertilization data of the rice planting, the twelfth expression and the third constraint condition are used to obtain the supplementary potassium fertilizer amount of the target rice planted in the target planting area during the complete growth period, wherein the twelfth expression is: ， ， In the formula, KC b is the potassium chloride base fertilizer application amount, Kcs is the potassium chloride cluster fertilizer application amount, K ar is the unit area potassium application amount, KF b is the proportion of potassium fertilizer base fertilizer, V BS is the unit area biogas slurry application amount, K BS is the potassium content in the biogas slurry; The third constraint condition is: When K ar ≤ V BS × K BS × 1000, the amount of supplemental potassium fertilizer during the entire growth period of the target rice planted in the target planting area is 0, when K ar × K Fb ≤ V BS × K BS × 1000≤ K ar , KC b =0, and the formula of Kcis modified as: ， In the formula, KCs' is the potassium chloride cluster fertilizer application amount, K ar is the unit area potassium application amount, V BS is the unit area biogas slurry application amount, K BS is the potassium content in the biogas slurry.

5. A computing system for biogas liquid fertilizer compound fertilization of rice planting, characterized in that, The method comprises the following steps: The data acquisition module is configured to: acquire soil data of a target planting area, fertilization data of rice planting, biogas slurry data to be applied, and planting data of target rice expected to be planted in the target planting area; The unit area soil nitrogen supply amount obtaining module is configured to: obtain the unit area soil nitrogen supply amount of the target planting area according to the soil data of the target planting area; The unit area pure nitrogen application amount obtaining module is configured to: obtain the unit area pure nitrogen application amount of the target planting area according to the unit area soil nitrogen supply amount of the target planting area, the fertilization data of the rice planting, and the planting data of the target rice; The unit area biogas slurry application amount obtaining module is configured to: obtain the unit area biogas slurry application amount of the target planting area according to the unit area pure nitrogen application amount of the target planting area, the fertilization data of the rice planting, and the biogas slurry data to be applied; The supplementary nitrogen fertilizer amount obtaining module is configured to: obtain the supplementary nitrogen fertilizer amount of the target rice during the complete growth period according to the unit area pure nitrogen application amount of the target planting area and the fertilization data of the rice planting; The unit area soil phosphorus and potassium supply amount obtaining module is configured to: obtain the unit area soil phosphorus supply amount and the unit area soil potassium supply amount of the target planting area according to the soil data of the target planting area; The unit area phosphorus and potassium application amount obtaining module is configured to: obtain the unit area phosphorus application amount and the unit area potassium application amount of the target planting area according to the unit area soil phosphorus supply amount and the unit area soil potassium supply amount of the target planting area, the planting data of the target rice, and the fertilization data of the rice planting; The supplementary phosphorus fertilizer amount obtaining module is configured to: obtain the supplementary phosphorus fertilizer amount of the target rice planted in the target planting area according to the unit area phosphorus application amount of the target planting area and the unit area biogas slurry application amount, and the biogas slurry data to be applied; The supplementary potassium fertilizer amount obtaining module is configured to: obtain the supplementary potassium fertilizer amount of the target rice planted in the target planting area during the complete growth period according to the unit area potassium application amount of the target planting area and the unit area biogas slurry application amount, and the biogas slurry data to be applied and the fertilization data of the rice planting; The soil data of the target planting area comprises any one or any combination of the following: soil alkali hydrolysis nitrogen content, soil pH value, soil organic matter content, soil available phosphorus content, and soil available potassium content; The biogas slurry data to be applied comprises any one or any combination of the following: total nitrogen content, total phosphorus content, and total potassium content; The planting data of the target rice comprises any one or any combination of the following: type of the target rice, planting target yield of the target rice, nitrogen requirement per hundred kilograms of target rice yield, phosphorus requirement per hundred kilograms of target rice yield, and potassium requirement per hundred kilograms of target rice yield; The fertilization data of the rice planting includes any one or any combination of the following: nitrogen use efficiency, proportion of nitrogen fertilizer base fertilizer, phosphorus use efficiency, potassium use efficiency, previous crop situation, and biogas slurry replacement rate of chemical fertilizer. The method comprises the following steps: According to the soil data of the target planting area, the unit area soil nitrogen supply amount of the target planting area is obtained by using a first expression and a first constraint condition, wherein the first expression is: ， where N S is the amount of nitrogen supplied per unit area of soil, in kg N / acre, AN is the soil alkali-hydrolyzable nitrogen content, β pH is the soil pH correction factor, SOM is the soil organic matter content, β Npc is the previous crop correction factor; The first constraint condition is: When SOM-2≤0 in the first expression, SOM-2=0; And, according to the unit area soil nitrogen supply amount of the target planting area, the fertilization data of the rice planting, and the planting data of the target rice, the unit area application pure nitrogen amount of the target planting area is obtained, comprising: According to the unit area soil nitrogen supply amount of the target planting area, the fertilization data of the rice planting, and the planting data of the target rice, the unit area application pure nitrogen amount of the target planting area is obtained by using a second expression, wherein the second expression is: ， wherein N ar is the amount of pure nitrogen applied per unit area, in kg N / acre, N r100 is the amount of nitrogen required to obtain 100 kg of target rice yield, Y is the target yield of the rice to be planted, N S is the amount of nitrogen supplied per unit area of soil, E N is the nitrogen use efficiency; According to the unit area application pure nitrogen amount of the target planting area, the fertilization data of the rice planting, and the to-be-applied biogas slurry data, the unit area biogas slurry application amount of the target planting area is obtained, comprising: According to the unit area application pure nitrogen amount of the target planting area, the fertilization data of the rice planting, and the to-be-applied biogas slurry data, the unit area biogas slurry application amount of the target planting area is obtained by using a third expression, wherein the third expression is: ， In the formula, V BS is the application amount of biogas slurry per unit area, unit ton / acre, N ar is the pure nitrogen application amount per unit area, NF b is the proportion of nitrogen fertilizer base fertilizer, R N is the biogas slurry replacement rate of chemical fertilizer, N BS is the nitrogen content in biogas slurry, β BS is the biogas slurry application amount correction coefficient.

6. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the program to realize the calculation method for biogas slurry and chemical fertilizer compound fertilization of rice planting according to any one of claims 1 to 4. 7.A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to realize the calculation method for biogas slurry and chemical fertilizer compound fertilization of rice planting according to any one of claims 1 to 4.

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