Evaluation method of intercropping pattern based on high stability of system productivity

Abstract

The present invention discloses an intercropping planting pattern evaluation method based on high stability of system productivity, relates to the technical field of crop planting pattern evaluation, and is used to solve the technical problem that the high productivity and stability of intercropping productivity are not comprehensively considered when evaluating the existing intercropping planting system, resulting in the evaluation result being unable to adapt to the current climate change. The intercropping planting pattern evaluation method includes: determining an intercropping system, the intercropping system includes a first crop and a second crop; for the intercropping system under any row ratio configuration, respectively obtaining the partial land equivalent ratio of the first crop and the second crop; obtaining the land equivalent ratio of the intercropping system under any row ratio configuration; obtaining the average value and standard deviation of the land equivalent ratio of the intercropping system under any row ratio configuration, and obtaining the high stability coefficient of the productivity of the intercropping system under any row ratio configuration according to the average value of the land equivalent ratio of the intercropping system under all row ratio configurations; selecting the best row ratio configuration according to the high stability coefficient to complete the intercropping planting pattern evaluation.

Description

Technical Field

[0001] The present invention relates to the technical field of crop planting pattern evaluation, and in particular to an intercropping planting pattern evaluation method based on high stability of system productivity. Background Art

[0002] Intercropping is a traditional and effective agricultural planting model. By planting two or more crops in the same field at the same time, it takes advantage of the ecological complementarity between crops, optimizes resource allocation, and improves land productivity and biodiversity. Changes in row configuration and crop bandwidth in the intercropping system are key ways to optimize the intercropping system, which can significantly affect the canopy morphology, interspecific competition, light energy utilization, soil erosion, and the occurrence of crop diseases. Narrow strip intercropping can amplify the intercropping effect, while wide strip planting may increase yields and reduce soil erosion and crop diseases. However, the effect of the intercropping system is not static. As the strip width increases, the intercropping effect will gradually weaken until it disappears.

[0003] In intercropping systems, the coexistence of tall crops (such as corn) and short crops (such as peanuts and soybeans) can achieve complementary utilization in space, but it may also cause tall crops to shade short crops, thereby affecting the growth and yield of short crops. This difference in morphological structure between crops makes the row ratio configuration of the intercropping system (i.e., the land area ratio of the two crops and the ratio of their respective side rows) a key factor in determining the balance between the advantages of tall crops and the disadvantages of short crops. With global warming, extreme weather events are increasing, posing a severe challenge to agricultural production. In particular, in the arid and semi-arid regions of northern China, the problem of low and unstable crop yields is particularly prominent. The intercropping planting model shows unique advantages in improving the temporal stability of yields due to its increased biodiversity. However, although the effect of intercropping on improving yields and land productivity has been widely confirmed, existing research is still insufficient in exploring the balance point between high and stable yields in intercropping systems.

[0004] In the existing technology, the evaluation of intercropping systems mainly relies on two indicators: land equivalent ratio (LER) and system net benefit (NE). LER evaluates whether the intercropping system has a yield advantage by comparing the ratio of the yield of each crop in the intercropping system to the yield of the monocropping system; while NE evaluates the net benefit of the intercropping system by calculating the difference between the total yield of the intercropping system and the total yield of the monocropping system. Although these two indicators can reflect the high yield of the intercropping system relative to the monocropping system, they do not take into account the stability of productivity, that is, stable yield. Therefore, the existing technology has obvious limitations in evaluating the intercropping system, and fails to comprehensively consider the high yield and stability of intercropping productivity, resulting in the evaluation results being unable to adapt to the current technical problems of climate change. Summary of the invention

[0005] The purpose of the present invention is to provide an intercropping planting pattern evaluation method based on the high stability of system productivity, which is used to solve the technical problem that the high productivity and stability of intercropping productivity are not comprehensively considered when evaluating the existing intercropping planting system, resulting in the evaluation results being unable to adapt to the current climate change. In view of this, the present invention is implemented through the following scheme.

[0006] An evaluation method for intercropping patterns based on high stability of system productivity includes:

[0007] determining an intercropping system, the intercropping system comprising a first crop and a second crop, the first crop and the second crop having a plurality of row ratio configurations;

[0008] For the intercropping system under any row ratio configuration, the partial land equivalent ratios of the first crop and the second crop were obtained respectively;

[0009] According to the partial land equivalent ratio, the land equivalent ratio of the intercropping system under any row ratio configuration is obtained;

[0010] Obtain the average value and standard deviation of the land equivalent ratio of the intercropping system under any row ratio configuration, and obtain the high stability coefficient of the productivity of the intercropping system under any row ratio configuration based on the average value of the land equivalent ratio of the intercropping system under all row ratio configurations;

[0011] The optimal row ratio configuration is selected according to the high stability coefficient to complete the intercropping pattern evaluation.

[0012] Compared with the prior art, in the intercropping pattern evaluation method based on the high stability of system productivity of the present invention, after determining the intercropping system, the land equivalent ratio of the intercropping system under any row ratio configuration can be obtained according to the partial land equivalent ratio of the first crop and the second crop in the intercropping system under any row ratio configuration; in the process of obtaining the high stability coefficient of the productivity of the intercropping system under any row ratio configuration, the average value and standard deviation of the land equivalent ratio of the intercropping system with the row ratio configuration, as well as the average value of the land equivalent ratio of the intercropping system under all row ratio configurations are considered at the same time. From the perspective of productivity and stability, this technical solution comprehensively considers the high productivity and stability of intercropping productivity, and uses this high stability coefficient to evaluate the intercropping pattern, which has a high correlation. Through the above-mentioned technical solution of the present invention, the technical problem that the high productivity and stability of intercropping productivity are not comprehensively considered when evaluating the intercropping system is solved, resulting in the evaluation results being unable to adapt to the current climate change.

[0013] Furthermore, in the intercropping pattern evaluation method based on the high stability of system productivity of the present invention, in the process of selecting the optimal row ratio configuration according to the high stability coefficient, the larger the high stability coefficient is, the better the row ratio configuration corresponding to the high stability coefficient is.

[0014] Furthermore, in the intercropping pattern evaluation method based on high stability of system productivity of the present invention, the selecting of the best row ratio configuration according to the high stability coefficient includes:

[0015] Obtain high stability coefficients of intercropping system productivity under each row ratio configuration;

[0016] Get the maximum value of the high stability coefficient;

[0017] The row ratio configuration corresponding to the maximum value is the optimal row ratio configuration.

[0018] Furthermore, in the intercropping pattern evaluation method based on high stability of system productivity of the present invention, the land equivalent ratio of the intercropping system under any row ratio configuration is the sum of the partial land equivalent ratios of the first crop and the second crop in the intercropping system under any row ratio configuration.

[0019] Furthermore, in the intercropping pattern evaluation method based on high stability of system productivity of the present invention, the partial land equivalent ratio of the first crop is the ratio of the yield of the first crop in the intercropping system to the yield of the first crop in the monocropping system.

[0020] Furthermore, in the intercropping pattern evaluation method based on high stability of system productivity of the present invention, the partial land equivalent ratio of the second crop is the ratio of the yield of the second crop in the intercropping system to the yield of the second crop in the monocropping system.

[0021] Furthermore, in the intercropping planting pattern evaluation method based on high stability of system productivity of the present invention, the high stability coefficient of intercropping system productivity under any row ratio configuration is obtained by the following formula:

[0022] ;

[0023] in, is the high stability coefficient of intercropping system productivity under the i-th row ratio configuration, is the average land equivalent ratio of the intercropping system under the i-th row ratio configuration, is the standard deviation of the land equivalent ratio of the intercropping system under the i-th row ratio configuration, The average land equivalent ratio of intercropping systems under all row ratio configurations.

[0024] Furthermore, in the intercropping planting pattern evaluation method based on high stability of system productivity of the present invention, the intercropping system is determined, including:

[0025] The intercropping system is determined by setting the row ratio configuration of the first crop and the second crop using a crop growth model.

[0026] Furthermore, in the intercropping planting pattern evaluation method based on high stability of system productivity of the present invention, the determination of the intercropping system further includes:

[0027] The intercropping system is determined by planting the first crop and the second crop in any row ratio configuration. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 is the uniform yield of corn in the intercropping system under different legume land ratios simulated by the crop growth model in Example 3 of the present invention from 1961 to 2020 ( Figure 1 (A)), soybean uniform yield ( Figure 1 (B))、Total output( Figure 1 (C)), and the weighted yield of the monoculture system ( Figure 1 (D) Schematic diagram;

[0030] Figure 2 is the high stability coefficient of the total yield of the intercropping system and the weighted yield of the monocropping system under different intercropping soybean land ratios simulated by the crop growth model in Example 3 of the present invention from 1961 to 2020 ( Figure 2 (A)), and the percentage increase in the stability and high stability coefficient of productivity of the intercropping system relative to the monocropping system ( Figure 2 (B) Schematic diagram of the

[0031] Figure 3 It is a schematic diagram of the high stability coefficient of the land equivalent ratio of the intercropping system under different intercropping soybean land ratios simulated by the crop growth model in Example 3 of the present invention from 1961 to 2020;

[0032] Figure 4 This is a schematic diagram of the high stability coefficient of the land equivalent ratio of the intercropping system under different side-row ratios when the legume land ratio is 0.5 from 1961 to 2020 simulated by the crop growth model in Example 3 of the present invention. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0036] Intercropping is a traditional and effective agricultural planting model. By planting two or more crops in the same field at the same time, it takes advantage of the ecological complementarity between crops, optimizes resource allocation, and improves land productivity and biodiversity. Changes in row configuration and crop bandwidth in the intercropping system are key ways to optimize the intercropping system, which can significantly affect the canopy morphology, interspecific competition, light energy utilization, soil erosion, and the occurrence of crop diseases. Narrow strip intercropping can amplify the intercropping effect, while wide strip planting may increase yields and reduce soil erosion and crop diseases. However, the effect of the intercropping system is not static. As the strip width increases, the intercropping effect will gradually weaken until it disappears.

[0037] In the existing technology, the evaluation of intercropping systems mainly relies on two indicators: land equivalent ratio (LER) and system net benefit (NE). The land equivalent ratio evaluates whether the intercropping system has a yield advantage by comparing the ratio of the yield of each crop in the intercropping system to the yield of monocropping; while the system net benefit evaluates the net benefit of the intercropping system by calculating the difference between the total yield of the intercropping system and the total yield of the monocropping system. Although these two indicators can reflect the high yield of the intercropping system relative to the monocropping system, they do not take into account the stability of productivity, that is, stable yield. Therefore, the existing technology has obvious limitations in evaluating the intercropping system, and fails to comprehensively consider the high yield and stability of intercropping productivity, resulting in the evaluation results being unable to adapt to the current technical problems of climate change.

[0038] In order to solve the above technical problems, the present invention provides an intercropping pattern evaluation method based on high stability of system productivity, comprising:

[0039] determining an intercropping system, the intercropping system comprising a first crop and a second crop, the first crop and the second crop having a plurality of row ratio configurations;

[0040] For the intercropping system under any row ratio configuration, the partial land equivalent ratios of the first crop and the second crop were obtained respectively;

[0041] According to the partial land equivalent ratio, the land equivalent ratio of the intercropping system under any row ratio configuration is obtained;

[0042] Obtain the average value and standard deviation of the land equivalent ratio of the intercropping system under any row ratio configuration, and obtain the high stability coefficient of the productivity of the intercropping system under any row ratio configuration based on the average value of the land equivalent ratio of the intercropping system under all row ratio configurations;

[0043] The optimal row ratio configuration is selected according to the high stability coefficient to complete the intercropping pattern evaluation.

[0044] In the case of adopting the above technical scheme, in the intercropping pattern evaluation method based on the high stability of system productivity of the present invention, after determining the intercropping system, the land equivalent ratio of the intercropping system under any row ratio configuration can be obtained according to the partial land equivalent ratio of the first crop and the second crop in the intercropping system under any row ratio configuration; in the process of obtaining the high stability coefficient of the productivity of the intercropping system under any row ratio configuration, the average value and standard deviation of the land equivalent ratio of the intercropping system with the row ratio configuration, as well as the average value of the land equivalent ratio of the intercropping system under all row ratio configurations are considered at the same time. From the perspective of productivity and stability, the technical scheme comprehensively considers the high productivity and stability of the intercropping productivity, and uses the high stability coefficient to evaluate the intercropping pattern, which has a high correlation. Through the above technical scheme of the present invention, the technical problem that the high productivity and stability of the intercropping productivity are not comprehensively considered when evaluating the intercropping system in the existing way, resulting in the evaluation results being unable to adapt to the current climate change, is solved.

[0045] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with specific embodiments, but the content of the present invention is not limited to the following embodiments.

[0046] Unless otherwise specified, the materials or raw materials used in the following examples are commercially available.

[0047] Example 1

[0048] This embodiment provides an intercropping pattern evaluation method based on high stability of system productivity, including:

[0049] S100, determining an intercropping system, the intercropping system comprising a first crop and a second crop, the first crop and the second crop having a plurality of row ratio configurations;

[0050] S200, for an intercropping system under any row ratio configuration, respectively obtaining a partial land equivalent ratio of a first crop and a second crop;

[0051] S300, obtaining a land equivalent ratio of an intercropping system under any row ratio configuration according to the partial land equivalent ratio;

[0052] S400, obtaining the average value and standard deviation of the land equivalent ratio of the intercropping system under any row ratio configuration, and obtaining the high stability coefficient of the productivity of the intercropping system under any row ratio configuration according to the average value of the land equivalent ratio of the intercropping system under all row ratio configurations;

[0053] S500, selecting the best row ratio configuration according to the high stability coefficient to complete the intercropping planting pattern evaluation; wherein, the larger the high stability coefficient is, the better the row ratio configuration corresponding to the high stability coefficient is.

[0054] Example 2

[0055] This embodiment provides an intercropping pattern evaluation method based on high stability of system productivity, including:

[0056] S100, setting a row ratio configuration of a first crop and a second crop in a crop growth model to determine an intercropping system, wherein the intercropping system includes a first crop and a second crop, and the first crop and the second crop have a plurality of row ratio configurations;

[0057] S200, for an intercropping system under any row ratio configuration, respectively obtaining partial land equivalent ratios of the first crop and the second crop through the yield results of the first crop and the second crop simulated by a crop growth model;

[0058] The partial land equivalent ratio of the first crop is the ratio of the yield of the first crop in the intercropping system to the yield of the first crop in the monocropping system; the partial land equivalent ratio of the second crop is the ratio of the yield of the second crop in the intercropping system to the yield of the second crop in the monocropping system;

[0059] S300, obtaining a land equivalent ratio of the intercropping system under any row ratio configuration according to the partial land equivalent ratio; the land equivalent ratio of the intercropping system under any row ratio configuration is the sum of the partial land equivalent ratios of the first crop and the second crop in the intercropping system under any row ratio configuration;

[0060] S400, obtaining the average value and standard deviation of the land equivalent ratio of the intercropping system under any row ratio configuration, and obtaining the high stability coefficient of the productivity of the intercropping system under any row ratio configuration according to the average value of the land equivalent ratio of the intercropping system under all row ratio configurations;

[0061] The high stability coefficient of intercropping system productivity under any row ratio configuration is obtained by the following formula:

[0062] ;

[0063] in, is the high stability coefficient of intercropping system productivity under the i-th row ratio configuration, is the average land equivalent ratio of the intercropping system under the i-th row ratio configuration, is the standard deviation of the land equivalent ratio of the intercropping system under the i-th row ratio configuration, The average land equivalent ratio of the intercropping system under all row ratio configurations;

[0064] S500, obtaining the high stability coefficient of the productivity of the intercropping system under each row ratio configuration; obtaining the maximum value of the high stability coefficient; the row ratio configuration corresponding to the maximum value is the optimal row ratio configuration, and the intercropping planting pattern evaluation is completed.

[0065] Example 3

[0066] This embodiment provides an intercropping pattern evaluation method based on high stability of system productivity, including:

[0067] S100, determining an intercropping system by configuring a row ratio of a first crop and a second crop in a crop growth model, wherein the intercropping system includes a first crop and a second crop, and the first crop and the second crop have a plurality of row ratio configurations;

[0068] This embodiment takes corn / soybean in the northern semi-arid region as an example, where corn is the first crop and soybean is the second crop, and the crop growth model APSIM-strip simulation method is used to complete the simulation. When simulating the model, different legume land ratios are first considered, and the configuration is from M2S16 (2 rows of corn intercropped with 16 rows of soybeans) to M16S2 (16 rows of corn intercropped with 2 rows of soybeans). The legume land ratio gradually decreases from 0.89 to 0.11; then the same land ratio and different row ratio configurations are considered. When the legume land ratio is selected as 0.5, the specific row ratio configuration is shown in Table 1 below.

[0069] Table 1 Leguminous land area ratio in different configuration scenarios of corn / soybean intercropping

[0070]

[0071] S200, for the intercropping system under any row ratio configuration, the partial land equivalent ratios of corn and soybean are obtained respectively;

[0072] The partial land equivalent ratio of corn is the ratio of the yield of corn in the intercropping system to the yield of corn in the monocropping system; the partial land equivalent ratio of soybean is the ratio of the yield of soybean in the intercropping system to the yield of soybean in the monocropping system;

[0073] S300, obtaining the land equivalent ratio of the intercropping system under any row ratio configuration according to the partial land equivalent ratio; the land equivalent ratio of the intercropping system under any row ratio configuration is the sum of the partial land equivalent ratios of corn and soybean in the intercropping system under any row ratio configuration;

[0074] S400, obtaining the average value and standard deviation of the land equivalent ratio of the intercropping system under any row ratio configuration, and obtaining the high stability coefficient of the productivity of the intercropping system under any row ratio configuration according to the average value of the land equivalent ratio of the intercropping system under all row ratio configurations;

[0075] The high stability coefficient of intercropping system productivity under any row ratio configuration is obtained by the following formula:

[0076] ;

[0077] in, is the high stability coefficient of intercropping system productivity under the i-th row ratio configuration, is the average land equivalent ratio of the intercropping system under the i-th row ratio configuration, is the standard deviation of the land equivalent ratio of the intercropping system under the i-th row ratio configuration, The average land equivalent ratio of the intercropping system under all row ratio configurations;

[0078] S500, obtaining the high stability coefficient of the productivity of the intercropping system under each row ratio configuration; obtaining the maximum value of the high stability coefficient; the row ratio configuration corresponding to the maximum value is the optimal row ratio configuration, and the intercropping planting pattern evaluation is completed.

[0079] In conjunction with the intercropping pattern evaluation method of this embodiment, please refer to Figure 1 , Figure 1 (A) is the average yield of corn in intercropping systems under different legume land ratios simulated by crop growth models from 1961 to 2020. Figure 1 (B) is the homogenized soybean yield in intercropping systems under different legume land ratios simulated by crop growth models from 1961 to 2020. Figure 1 (C) is the total yield of intercropping systems under different legume land ratios simulated by crop growth models from 1961 to 2020. Figure 1 (D) is the weighted yield of monoculture system under different legume land ratios simulated by crop growth model from 1961 to 2020.

[0080] For further information, see Figure 2 ,in, Figure 2 (A) is the high stability coefficient of the total yield of the intercropping system and the weighted yield of the monocropping system under different intercropping soybean land ratios simulated by the crop growth model from 1961 to 2020. Figure 2(B) is the percentage increase of the stability and high stability coefficient of the productivity of the intercropping system relative to the monocropping system. It can be seen that the high stability coefficient of the yield of the monocropping and intercropping systems is significantly correlated with the intercropping soybean area ratio. As the intercropping soybean area ratio decreases, the high stability coefficient of the total yield of the intercropping system gradually increases, which is mainly due to the contribution of the high stability of corn yield. When the intercropping soybean area ratio is 0.5 or less, the high stability of the total yield of the intercropping system is higher than the weighted yield of the monocropping system, and as the intercropping soybean area ratio decreases, the yield stability and high stability coefficient of the intercropping system gradually increase relative to the increase of the monocropping system.

[0081] Furthermore, if the high stability coefficient of the total yield of the two crops in the intercropping system is used as the basis for selecting the optimal row ratio configuration, the optimal legume ratio is 0.14 ( Figure 2 (A)) The yield stability and high stability coefficient of this cropping system are the highest compared to single cropping. However, in this configuration scenario, the disadvantage of intercropping soybeans is too great, resulting in its yield being close to zero ( Figure 1 (B)). Considering the demand for leguminous crops in my country, the economic income of farmers, the economic and labor input during sowing, etc., this is obviously not a suitable configuration choice. Therefore, it can be considered that the high stability coefficient obtained based on the sum of the yields of the two crops in the intercropping system is unreasonable.

[0082] For further information, see Figure 3 , Figure 3 This is a schematic diagram of the high stability coefficient of the land equivalent ratio of the intercropping system under different intercropping soybean land ratios simulated by the crop growth model from 1961 to 2020; it can be seen that the high stability of the land equivalent ratio (LER) of the corn / soybean intercropping system is also significantly correlated with the intercropping soybean land ratio. As the intercropping soybean land ratio decreases, the high stability of the intercropping system LER shows a downward trend. When the soybean land ratio is 0.5, the high stability coefficient of the intercropping system LER is the highest, that is, the high stability of land productivity is the largest. This result further shows that when characterizing the high stability of the intercropping system, it is more appropriate to use the land equivalent ratio as the productivity indicator of intercropping than to use the total yield of the intercropping system. Based on this conclusion, in the subsequent simulation setting process (determining the intercropping system row ratio configuration), the legume land ratio can be set to 0.5, and on this basis, the side row ratio (i.e., bandwidth) can be changed to further screen the optimal row ratio configuration mode of intercropping.

[0083] For further information, see Figure 4 , Figure 4This is a schematic diagram of the high stability coefficient of the land equivalent ratio of the intercropping system under different side-row ratios when the legume land ratio is 0.5 from 1961 to 2020. It can be seen that with the decrease of the side-row ratio, the high stability of the intercropping system LER shows an overall downward trend. When the side-row ratio is 0.5 (4 rows of corn intercropped with 4 rows of soybeans), the high stability coefficient of the intercropping system LER is the highest, that is, the high stability of land productivity is the greatest. Therefore, based on the above analysis results, in semi-arid areas with water restrictions, Example 3 of the present invention uses a planting pattern of 4 rows of corn intercropped with 4 rows of soybeans with a narrow bandwidth, which can give full play to the resource utilization advantages of intercropping and maximize the high yield and stable yield of the intercropping system. The corn / soybean 4:4 row matching pattern is also one of the main corn / soybean intercropping planting patterns currently promoted in my country.

[0084] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0085] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for evaluating intercropping patterns based on high stability of system productivity, characterized in that: include: Determine an intercropping system, the intercropping system comprising a first crop and a second crop, the first crop and the second crop having a plurality of row ratio configurations; the first crop is corn, and the second crop is soybean; For the intercropping system under any row ratio configuration, the partial land equivalent ratios of the first crop and the second crop were obtained respectively; According to the partial land equivalent ratio, the land equivalent ratio of the intercropping system under any row ratio configuration is obtained; Obtain the average value and standard deviation of the land equivalent ratio of the intercropping system under any row ratio configuration, and obtain the high stability coefficient of the productivity of the intercropping system under any row ratio configuration based on the average value of the land equivalent ratio of the intercropping system under all row ratio configurations; The best row ratio configuration is selected according to the high stability coefficient to complete the intercropping planting pattern evaluation; the larger the high stability coefficient is, the better the row ratio configuration corresponding to the high stability coefficient is; The high stability coefficient of the intercropping system productivity under any row ratio configuration is obtained by the following formula: ； in, For the i The high stability coefficient of intercropping system productivity under row ratio configuration, For the i The average land equivalent ratio of the intercropping system under the row ratio configuration, For the i The standard deviation of the land equivalent ratio of the intercropping system under the row ratio configuration, It is the average land equivalent ratio of the intercropping system under all row ratio configurations.

2. The intercropping pattern evaluation method based on high stability of system productivity according to claim 1 is characterized in that: The selecting the best row ratio configuration according to the high stability coefficient includes: Obtain high stability coefficients of intercropping system productivity under each row ratio configuration; Get the maximum value of the high stability coefficient; The row ratio configuration corresponding to the maximum value is the optimal row ratio configuration.

3. The intercropping pattern evaluation method based on high stability of system productivity according to claim 2 is characterized in that: The land equivalent ratio of the intercropping system under any row ratio configuration is the sum of the partial land equivalent ratios of the first crop and the second crop in the intercropping system under any row ratio configuration.

4. The intercropping pattern evaluation method based on high stability of system productivity according to claim 3 is characterized in that: The partial land equivalent ratio of the first crop is the ratio of the yield of the first crop in the intercropping system to the yield of the first crop in the monocropping system.

5. The intercropping pattern evaluation method based on high stability of system productivity according to claim 4 is characterized in that: The partial land equivalent ratio of the second crop is the ratio of the yield of the second crop in the intercropping system to the yield of the second crop in the monocropping system.

6. The intercropping pattern evaluation method based on high stability of system productivity according to claim 5 is characterized in that: The determined intercropping system comprises: The intercropping system is determined by setting the row ratio configuration of the first crop and the second crop using a crop growth model.

7. The intercropping pattern evaluation method based on high stability of system productivity according to claim 1 is characterized in that: The determined intercropping system further comprises: The intercropping system is determined by planting the first crop and the second crop in any row ratio configuration.

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