Corn and soybean rotation tillage planting method based on carbon sequestration and emission reduction

Abstract

The invention discloses a corn and soybean rotation tillage planting method based on carbon sequestration and emission reduction, and belongs to the technical field of agriculture. Setting a soil middle layer and a soil bottom layer of the corn and soybean planting plot; obtaining the types of land parcel farming crops in future time; obtaining the returning straw quantity ratio of the corn and the soybean of the current land parcel; corn and soybean returning straw is obtained based on the returning straw proportion and mixed with soil on the soil surface layer; part of soil is separated from the soil middle layer of the current land parcel and evenly mixed with straw mixed soil; the new bottom layer soil is buried in the position of the soil bottom layer of the current land parcel, the soil bottom layer of the current land parcel is adjusted to be a new soil middle layer, and the soil middle layer of the current land parcel is adjusted to be a new soil surface layer. The problems that the decomposition time of the straw returned to the field is short, and the setting of the straw returned to the field is unreasonable are solved. Therefore, carbon sequestration and emission reduction of corn and soybean rotation tillage areas are realized based on effective straw returning operation.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of agriculture, and particularly relates to a corn-soybean rotation planting method based on carbon fixation and emission reduction. BACKGROUND

[0002] Corn and soybean are important economic crops in China and are planted in large quantities in the northeast of China. The biological characteristics of corn and soybean ensure that these two crops have good intercropping and rotation characteristics. Therefore, intercropping and rotation methods have been widely used in current cultivation. Under the background of smart agriculture, carbon fixation and emission reduction in crop cultivation has also been put on the agenda. Therefore, extensive research has been conducted on how to achieve carbon fixation and emission reduction while ensuring yield in corn-soybean rotation. In current corn-soybean rotation, the main method for achieving carbon fixation and emission reduction includes straw returning to field. However, current straw returning to field usually adopts direct returning to field treatment. This method can easily lead to short decomposition time of returned straw, making it difficult to fully utilize the nutrients produced after decomposition, thereby requiring frequent fertilizer application and failing to achieve the effect of carbon fixation and emission reduction. In addition, the amount of returned straw is not reasonable, which can easily produce excessive greenhouse gases and reduce the effect of carbon fixation and emission reduction.

[0003] Therefore, how to reasonably prolong the decomposition time of returned straw and reasonably set the amount of returned straw is a technical problem that needs to be solved by those skilled in the art. SUMMARY

[0004] In order to solve the problem of unreasonable amount of returned straw and insufficient decomposition time of returned straw in corn-soybean rotation planting in the prior art, the application discloses a corn-soybean rotation planting method based on carbon fixation and emission reduction. Specifically, it comprises the following steps: A corn-soybean rotation planting method based on carbon fixation and emission reduction, the method comprising the following steps: Based on the root depth of corn and soybean, the soil surface layer thickness of corn and soybean planting plots is obtained respectively; Based on the soil surface layer thickness of the corn and soybean planting plots, the soil middle layer and the soil bottom layer of the corn and soybean planting plots are obtained respectively; Based on the corn and soybean rotation period, the crop type of the plot at a future time is obtained; Based on the crop type of the plot at the future time, the returned straw amount ratio of corn and soybean of the current plot is obtained; Based on the returned straw amount ratio of corn and soybean of the current plot, the returned straw of corn and soybean is obtained, and the returned straw is mixed with the soil surface layer of the soil to obtain straw mixed soil; Part of the soil in the soil middle layer of the current plot is separated and uniformly mixed with the straw mixed soil to obtain new bottom soil; burying the new bottom layer of soil to a position of a bottom layer of soil of a current plot of land, obtaining a new bottom layer of soil, the bottom layer of soil of the current plot of land being adjusted to a new middle layer of soil, and the middle layer of soil of the current plot of land being adjusted to a new top layer of soil.

[0005] Optionally, the soil top layer thickness of the corn and soybean planting plots is obtained based on the root depth of the corn and the soybean, and includes: obtaining corn and soybean varieties planted in the corn and soybean rotation area, and obtaining root depths of the corn and soybean varieties; obtaining a maximum value of the root depths of the corn and soybean varieties, and setting the maximum value of the root depths of the corn and soybean varieties as the soil top layer thickness of the corn and soybean current planting plots.

[0006] Optionally, the soil middle layer and the soil bottom layer of the corn and soybean planting plots are obtained based on the soil top layer thickness of the corn and soybean planting plots, and includes: obtaining a maximum soil ploughing depth available in the corn and soybean rotation area; removing the soil top layer thickness of the corn and the soybean from the maximum soil ploughing depth to obtain a straw returning layer; layering the straw returning layer to obtain the soil middle layer and the soil bottom layer of the corn and soybean current planting plots.

[0007] Optionally, the crop types of the plots of land in the future time are obtained based on the corn and soybean rotation period, and includes: obtaining a corn and soybean rotation period, and obtaining corn and soybean future planting plots in a future ploughing-harvesting period; establishing a corresponding relationship between the ploughing-harvesting period and the corn and soybean future planting plots to obtain a plot of land and crop corresponding relationship; obtaining crop types of all plots of land in a future time period based on the plot of land and crop corresponding relationship.

[0008] Optionally, the straw returning amount ratio of the corn and the soybean of the current plot of land is obtained based on the crop types of the plots of land in the future time, and includes: obtaining the nutrient demand amount of each type of the future soil top layer corresponding to the crop types of the plots of land in the future second ploughing-harvesting period based on the crop types of the plots of land in the future time; obtaining the nutrient amount of each type generated in the decomposition process of the straw returning corn and soybean of unit weight; obtaining the straw returning amount ratio of the corn and the soybean of the current plot of land based on the nutrient amount of each type generated in the decomposition process of the straw returning corn and soybean of unit weight and the nutrient demand amount of each type.

[0009] Optionally, the amount of nutrients generated by the corn and soybean stalks returned to the field per unit weight during the decomposition process, and the amount of nutrients required, are used to determine the amount of corn and soybean stalks returned to the field in the current plot, comprising: The amount of nutrients required by the corn and soybean stalks returned to the field per unit weight in the current plot, located in the bottom layer of the soil, and generated within a cultivation-harvest cycle, are obtained to determine the amount of nutrients generated by the corn and soybean stalks returned to the field in the bottom layer of the soil during the decomposition process; The amount of nutrients required by the corn and soybean stalks returned to the field per unit weight in the current plot, located in the middle layer of the soil, and generated within a cultivation-harvest cycle, are obtained to determine the amount of nutrients generated by the corn and soybean stalks returned to the field in the middle layer of the soil during the decomposition process; The amount of nutrients generated by the corn and soybean stalks returned to the field in the middle layer of the soil during the decomposition process, and the amount of nutrients generated by the corn and soybean stalks returned to the field in the bottom layer of the soil during the decomposition process, are summed up respectively to determine the amount of nutrients generated by the corn and soybean stalks returned to the field during the decomposition process; The amount of nutrients required by the corn and soybean stalks returned to the field per unit weight during the decomposition process, and the amount of nutrients generated by the corn and soybean stalks returned to the field in the current plot, are used to determine the amount of corn and soybean stalks returned to the field in the current plot.

[0010] Optionally, the amount of nutrients required by the corn and soybean stalks returned to the field per unit weight during the decomposition process, and the amount of nutrients generated by the corn and soybean stalks returned to the field in the current plot, are used to determine the amount of corn and soybean stalks returned to the field in the current plot, comprising: A determinant equation is established based on the amount of nutrients generated by the corn and soybean stalks returned to the field during the decomposition process, and the amount of nutrients required by the corn and soybean stalks returned to the field in the future top layer of the soil; The determinant equation is solved to determine the amount of corn and soybean stalks returned to the field in the current plot; All combinations of corn and soybean stalks returned to the field according to the amount of corn and soybean stalks returned to the field in the current plot are obtained, and the volume of the crushed and uniformly mixed corn and soybean stalks is obtained; When the volume of the crushed and uniformly mixed corn and soybean stalks is not greater than the volume of the bottom layer of the soil in the current plot, the corresponding amount of corn and soybean stalks returned to the field is determined, which is the amount of corn and soybean stalks returned to the field in the current plot.

[0011] Optionally, the amount of corn and soybean stalks returned to the field in the current plot is used to obtain the corn and soybean stalks returned to the field, and the corn and soybean stalks returned to the field are mixed with the top layer of the soil to obtain a mixture of the stalks and the soil, comprising: determine the corn and soybean straw weight of the returned straw based on the corn and soybean straw weight of the returned straw; based on the corn and soybean straw weight of the returned straw, the returned straw is configured, and the returned straw is crushed and uniformly mixed to obtain mixed straw; The soil surface of the current plot of land is mixed with the mixed straw to obtain a straw mixed soil.

[0012] Optionally, the part of the soil is separated from the middle layer of the soil of the current plot of land, and is uniformly mixed with the straw mixed soil to obtain a new bottom layer soil, comprising: determine the bottom area of the middle layer of the soil of the current plot of land, and separate the soil of the bottom layer from the middle layer of the soil of the current plot of land to obtain separated soil; The separated soil and the straw mixed soil are uniformly mixed to obtain a new bottom layer soil.

[0013] Optionally, the new bottom layer soil is buried in the position of the bottom layer of the soil of the current plot of land to obtain a new soil bottom layer, the bottom layer of the soil of the current plot of land is adjusted to the new middle layer of the soil, and the middle layer of the soil of the current plot of land is adjusted to the new surface layer of the soil, comprising: The new bottom layer soil is buried in the position of the bottom layer of the soil of the current plot of land to form a new soil bottom layer; The bottom layer of the soil of the current plot of land is laid on the new soil bottom layer, and the bottom layer of the soil of the current plot of land becomes the new middle layer of the soil; The middle layer of the soil of the current plot of land is laid on the new middle layer of the soil, and the middle layer of the soil of the current plot of land becomes the new surface layer of the soil.

[0014] The beneficial effects of the present application include: 1. The decomposition time of the returned straw is prolonged. In the technical scheme of the present application, the returned straw is buried in the bottom layer of the soil, the bottom layer is adjusted to the middle layer in the next year, and the bottom layer is adjusted to the surface layer of the soil in the third year. The decomposition time of the returned straw is not less than 2 years when it is really used for corn or soybean cultivation, thereby prolonging the decomposition time, increasing the nutrient content, and reducing the greenhouse gas emission.

[0015] 2. The reasonable setting of the returned straw is realized. In the technical scheme of the present application, the corn straw and the soybean straw are mixed, the nutrient content of the two types of straw is different, the mixed straw can effectively provide all types of nutrients, and the straw ratio is designed, thereby ensuring the reasonable setting of the returned straw.

[0016] 3. The height of the returned straw is decomposed. In the technical scheme, the soil at the bottom layer is mixed with the soil at the middle layer, which is essentially the soil at the bottom layer arranged last year. The microorganism content and the content of the decomposition accelerator in the straw are greatly improved after one year of decomposition. The mixed straw can promote the decomposition of the straw in the new soil at the bottom layer, thereby ensuring the high decomposition of the returned straw. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments of the present application or the prior art will be briefly introduced. Obviously, the following description is only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. The drawings are used to provide further understanding of the present disclosure and constitute a part of the specification, and are used to explain the present disclosure together with the following specific embodiments, but do not constitute a limitation on the present disclosure. In the drawings: Figure 1 A flow chart of a corn-soybean rotation planting method based on carbon sequestration and emission reduction is provided for the embodiments of the present application. Figure 2 A soil layer distribution schematic diagram in a corn-soybean rotation planting method based on carbon sequestration and emission reduction is provided for the embodiments of the present application. Figure 3 A land distribution schematic diagram in a corn-soybean rotation planting method based on carbon sequestration and emission reduction is provided for the embodiments of the present application. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. In addition, in the embodiments of the present application, "first", "second", etc. are used to distinguish similar objects, not necessarily to describe a specific order or sequence.

[0019] Corn and soybean as the main economic crops in northeast China, in recent years, the cultivation began to explore how to improve the yield of both, for this developed rotation and intercropping method, but also began to actively explore straw returning. However, the overall climate in northeast China is relatively dry, and the time in low temperature is longer every year, after straw returning, the decomposition time of straw is shorter, not only can not fully release the nutrients in the straw, but also can produce too much greenhouse gas because of incomplete decomposition, it is difficult to achieve carbon sequestration and emission reduction. In addition, in the rotation of corn and soybean, the straw ratio of each plot is the same, and the amount of straw is completely based on experience, it is difficult to fully play the role of straw returning in promoting the yield of corn and soybean, and it is easy to cause unreasonable straw returning amount, which makes it difficult to achieve carbon sequestration and emission reduction.

[0020] In order to solve the above problems, the application discloses a corn and soybean rotation planting method based on carbon sequestration and emission reduction, as shown in the figure, the method provided by the embodiment of the application is a flow chart of corn and soybean rotation planting method based on carbon sequestration and emission reduction, the method comprises the following steps: Figure 1 S110, based on the root depth of corn and soybean, the soil surface thickness of corn and soybean planting plot is obtained respectively.

[0021] S120, based on the soil surface thickness of corn and soybean planting plot, the soil middle layer and the soil bottom layer of corn and soybean planting plot are obtained respectively.

[0022] S130, based on the rotation period of corn and soybean, the plot cultivation crop type of future time is obtained.

[0023] S140, based on the plot cultivation crop type of future time, the straw returning amount ratio of corn and soybean of current plot is obtained.

[0024] S150, based on the straw returning amount ratio of corn and soybean of current plot, the straw returning of corn and soybean is obtained, and the straw mixed soil is obtained after mixing with the soil surface soil.

[0025] S160, part of the soil is separated from the soil middle layer of current plot, and is uniformly mixed with the straw mixed soil to obtain new bottom soil.

[0026] S170, the new bottom soil is buried in the position of the soil bottom layer of current plot to obtain new soil bottom layer, the soil bottom layer of current plot is adjusted to new soil middle layer, and the soil middle layer of current plot is adjusted to new soil surface layer.

[0027] ​The beneficial effect of the above steps is that the decomposition time of the returned straw can be prolonged, and the reasonable setting of the ratio and amount of returned straw is ensured, thereby fully improving the rationality of the set returned straw, so as to improve the yield and achieve the effect of carbon sequestration and emission reduction.

[0028] In the following, the specific content of all the above steps will be described, specifically: As described in step S110, the purpose of this step is to determine the root depth of corn and soybean during cultivation, so as to determine the thickness of the soil surface layer according to the root depth, which can lay the foundation for subsequent soil layer segmentation. Specifically: S111, obtaining the corn and soybean varieties planted in the corn and soybean rotation area, and obtaining the root depth of the corn and soybean varieties.

[0029] The purpose of this step is that the corn and soybean cultivation area in the northeast region is very large, and the extensive corn and soybean rotation and intercropping cultivation method can be considered for large areas of land, and from the overall point of view, the root depth distribution of corn and soybean is different, and the depth of corn root and soybean root will be distributed in an interval respectively, then according to the interval parameter, the soil surface layer parameter can be determined.

[0030] Among them, the corn and soybean varieties commonly planted in the whole area are obtained, and the root depth of different varieties is obtained.

[0031] Among them, the root depth of the new variety can also be obtained based on the test information of the new variety.

[0032] S112, obtaining the maximum value of the root depth of the corn and soybean varieties, and setting the maximum value of the root depth of the corn and soybean varieties as the soil surface layer thickness of the corn and soybean planting plot.

[0033] The purpose of this step is to determine the soil surface layer thickness corresponding to different cultivated crop types based on the root depth parameters of corn and soybean varieties.

[0034] Among them, the maximum value of the root depth of the corn and soybean varieties obtained is determined based on the information of different varieties, rather than obtaining the maximum value of the root depth of a single plant.

[0035] Among them, the maximum value of the root depth can be directly used as the soil surface layer thickness of corn and soybean during cultivation.

[0036] In some embodiments, the maximum value of the root depth of corn and soybean can also be extended to a certain depth, and the interval from the ground surface to this depth interval is determined, and the interval between the two is the soil surface layer, and the interval is the soil surface layer thickness.

[0037] The beneficial effect of step S110 is that the soil surface layer thickness can be determined by determining the root depth of corn and soybeans, and the reasonable determination of the soil surface layer thickness is achieved.

[0038] As described in step S120, the purpose of this step is to determine the middle layer and bottom layer of the soil based on the determination of the soil surface layer, which can ensure the adjustment of the soil layer position when the rotation cultivation is performed. Specifically: S121, obtaining the maximum soil plowing depth in the corn and soybean rotation cultivation area.

[0039] The purpose of this step is that the rotation cultivation area of corn and soybeans does not allow the whole land to be plowed to a great depth, so the plowing depth needs to be determined, and considering that mechanized operation is needed when rotation cultivation is performed, the maximum soil plowing depth is directly determined to determine the depth of the whole soil layer.

[0040] Among them, the maximum soil plowing depth can be set based on the soil plowing mechanical parameters.

[0041] Among them, the maximum soil plowing depth can be determined according to the soil underground environment of the rotation cultivation area.

[0042] In some embodiments, the maximum soil plowing depth can be directly determined by the technical personnel in the agricultural production process.

[0043] S122, removing the soil surface layer thickness of corn and soybeans from the maximum soil plowing depth to obtain the straw returning layer.

[0044] The purpose of this step is that the present application considers the total depth of the soil layer and the decomposition time of the straw to divide the soil layer of the whole area into three levels, and determines other soil levels based on the obtained soil surface layer.

[0045] Among them, the maximum soil plowing depth is taken as the whole cultivation soil layer to obtain the total level depth of the soil.

[0046] Among them, after removing the soil surface layer from the maximum depth, the straw returning layer can be obtained.

[0047] Among them, the meaning of the straw returning layer is the layer mainly for returning straw decomposition, and from the distribution result, the straw returning layer contains the middle layer of the soil and the bottom layer of the soil.

[0048] S123, stratifying the straw returning layer to obtain the middle layer of the soil and the bottom layer of the soil of the current planting plot of corn and soybeans.

[0049] The purpose of this step is to separate the soil bottom layer and the soil middle layer in the land, so as to obtain specific levels.

[0050] Wherein, after obtaining the straw returning to field layer, the straw returning to field layer can be divided equally, so as to directly obtain the soil middle layer and the soil bottom layer.

[0051] In some embodiments, for the straw returning to field layer, the current layering thickness is adjusted according to the type of crop planted in the future time period. It should be noted that the future time period in this method refers to the type of crop planted in the third year, for example, soybeans are planted this year, corn is planted next year, and soybeans are planted again in the third year, so the bottom layer thickness this year can be smaller than the thickness of the soil middle layer. As shown in Figure 2 The soil layer distribution diagram in the corn-soybean rotation planting method based on carbon sequestration and emission reduction provided by the embodiment of the present application is shown. The dashed box part represents the type of crop planted on the land represented by the implementation box part. Whether it is a corn planting land or a soybean planting land, it is divided into three levels, namely the soil surface layer, the soil middle layer and the soil bottom layer. In addition, it can be seen that the thickness of the soil surface layer of the soybean planting land is smaller than that of the corn planting land. Of course, for the specific distribution of each level, the type of crop planted in the future time needs to be determined. In addition, the dashed arrow represents the transfer direction of each soil layer.

[0052] The beneficial effect of step S120 is that by layering the soil bottom layer and the soil middle layer, the vertical layering parameters of the entire soil can be obtained to better adapt to the demand of the type of crop planted in the corn-soybean rotation planting land for the thickness of the soil.

[0053] As described in step S130, the purpose of this step is that for the corn-soybean rotation area, the crop planted on the land may change every year, so in order to ensure that the soil surface layer and the crop are adapted when the corresponding crop planting time arrives, the type of crop planted on the land in the future time needs to be determined to specifically determine the corresponding soil layer setting scheme. Specifically: S131, obtaining the corn-soybean rotation period and obtaining the corn and soybean future planting land in the future planting-harvesting period.

[0054] The purpose of this step is to determine the corn and soybean planting land in the future time period, which is equivalent to determining the type of crop planted on different lands in different time periods in the future.

[0055] Wherein, according to the land distribution scheme in the entire corn and soybean planting area, the corn and soybean planting land in the future planting-harvesting period is determined.

[0056] Wherein, the so-called cultivation-harvesting cycle refers to the entire period from sowing to harvesting of corn or soybeans, of course, one cultivation-harvesting cycle can also be considered as one year.

[0057] Wherein, as shown in Figure 3 The figure shows the distribution of the plots in the corn-soybean rotation planting method based on carbon sequestration and emission reduction provided by the embodiments of the present application, and it can be clearly seen that the intercropping plot areas of soybeans and corn are different, and the area ratio of soybean and corn plots is usually 1:2, while in agricultural production, the commonly used scheme is 2 rows of soybeans and 4 rows of corn, or 3 rows of soybeans and 6 rows of corn, so in the specific processing, the future cultivation plot needs to be determined according to the rotation cycle, rather than simply alternating the configuration of the crop types on the same plot.

[0058] S132, establishing a corresponding relationship between the cultivation-harvesting cycle and the future cultivation plots of corn and soybeans to obtain the plot and crop corresponding relationship.

[0059] The purpose of this step is to consider that the overall technical purpose of the present application is to be able to ensure that when the corresponding crop is planted in the plot, the nutrient species category and content in the soil surface layer of the crop can support the demand of the planted crop. Therefore, the corresponding relationship between the future cultivation plots of corn and soybeans and the crops is determined here.

[0060] Wherein, the order of all planted crops in each cultivation-harvesting cycle in the future time is obtained.

[0061] Wherein, based on the crop cultivation order in each plot, the crop category planted in each plot in the future time is determined.

[0062] Wherein, the corresponding relationship between the plot and the planted crop in the future time needs to be determined.

[0063] Wherein, in the case of taking the current time period as the reference time, the crop category planted in the plot in the second year of the future time needs to be determined, that is, in all established plot and crop corresponding relationships, the corresponding relationship between each plot and the crop to be planted in the second year of the future time needs to be established.

[0064] Wherein, the so-called plot and crop corresponding relationship refers to the crop category to be planted in a certain plot in the future time.

[0065] S133, based on the plot and crop corresponding relationship, obtaining the cultivation crop type of all plots in the future time period.

[0066] The purpose of this step is to determine the crop type cultivated in all plots in the future time period in the entire corn-soybean rotation area.

[0067] Wherein, based on the obtained plot and crop corresponding relationship, the cultivated crop type in the future period of time is directly determined.

[0068] Wherein, the depth relationship of each soil layer can be determined according to the cultivated crop type in the future period of time.

[0069] In some embodiments, after the cultivated crop type information in the future time is determined, the corresponding soil layer thickness information is set synchronously. As shown in Table 1: ; Wherein, N represents the current year information, since the application is based on the adjustment of the soil layer position to obtain the soil layer information, the crop planting information of last year also needs to be determined to make the crop planting plan in the future time. The parameters H1~H3 and L1~L3 respectively represent the three soil layer thicknesses corresponding to the corn and soybean planting processes.

[0070] The beneficial effect of step S130 is that by determining the crop type planted on each plot in each cultivation-harvesting cycle in the future period of time, the soil layer thickness information in the future period of time and the nutrient quality demand of the soil surface layer can be better set.

[0071] As described in step S140, the purpose of this step is to determine the nutrient demand of the soil surface layer when reaching the corresponding crop planting time point after determining the cultivated crop type on the plot in the future time, thereby deducing the straw returning information of the soil bottom layer in the current time node. Specifically: S141, based on the plot cultivated crop type in the future time, obtaining the nutrient demand amount of the future soil surface layer corresponding to the plot cultivated crop type in the future second cultivation-harvesting cycle.

[0072] The purpose of this step is to determine the nutrient demand amount of the required crop between the plot and the cultivated crop type in the related cultivation-harvesting cycle in the future period of time.

[0073] Wherein, the cultivated crop corresponding to each plot in the future time is determined.

[0074] Wherein, because the decomposition time of straw underground in the technical solution of the application is 2 years, it means that from the current time point as the starting time, the straw returned to the soil bottom layer in the current cultivation-harvesting cycle will reach the soil surface in the future second cultivation-harvesting cycle, so it is necessary to obtain the plot cultivated crop type in the future second cultivation-harvesting cycle to determine the nutrient demand amount of the soil surface layer in the cycle.

[0075] The so-called future soil surface layer refers to the soil surface layer at the second plowing-harvesting cycle.

[0076] The demand of each type of nutrient during the growth of the crop type needs to be obtained based on the crop type of the plot, and the so-called each type of nutrient includes nitrogen, phosphorus, and potassium elements, and organic matter, etc.

[0077] In some embodiments, only the total amount of each type of nutrient required by the crop type during the seedling stage of the crop type in the future soil surface layer, or the proportion of each type of nutrient, can be obtained.

[0078] S142, obtaining the amount of each type of nutrient generated by the corn and soybean straw returned to the field per unit weight during the decomposition process.

[0079] The purpose of this step is to obtain the amount of each type of nutrient that can be generated by the corn and soybean straw returned to the field per unit weight during the decomposition process, which can be used for subsequent matching analysis.

[0080] The decomposition analysis of the corn straw returned to the field can determine the amount of each type of nutrient that can be provided in the soil bottom layer and the soil middle layer environment and finally reach the soil surface layer based on the test field test method.

[0081] The decomposition analysis of the soybean straw returned to the field can determine the amount of each type of nutrient that can be provided in the soil bottom layer and the soil middle layer environment and finally reach the soil surface layer based on the test field test method.

[0082] In the analysis of the amount of each type of nutrient provided by the corn and soybean straw returned to the field, laboratory simulation can also be used for measurement.

[0083] In the measurement based on the test field, considering that the straw returned to the field needs to be uniformly mixed with the soil in the soil surface layer, and there is inevitably each type of nutrient in the soil surface layer itself, it is necessary to measure the amount of each type of nutrient in the soil surface layer, obtain the measurement result, and directly exclude the measurement result when finally switching to the soil surface layer, in order to accurately measure the amount of nutrient provided by the straw returned to the field.

[0084] S143, based on the amount of each type of nutrient generated by the corn and soybean straw returned to the field per unit weight during the decomposition process, and the demand amount of each type of nutrient, obtaining the matching of the corn and soybean straw returned to the field of the current plot.

[0085] The purpose of this step is to determine the matching of the corn and soybean straw returned to the field, which can ensure that after the straw returned to the field is decomposed, it reaches the soil surface layer and can exactly match the demand of the crop type at the future time.

[0086] The corn and soybean straw ratio of the current land is the ratio of corn and soybean straw in the straw put into the current land after the cultivation of the current land.

[0087] The determination of the straw ratio is achieved by obtaining the required amount of nutrients and the amount of nutrients provided by unit weight of straw.

[0088] The beneficial effect of step S140 is that the determination of the straw ratio can fully ensure that the nutrients provided by the straw after two years of decomposition can meet the growth requirements of corn and soybean.

[0089] In order to better illustrate the technical method content of step S143, step S143 will be described in detail, specifically: S1431, respectively, obtain the amount of nutrients produced by unit weight of corn and soybean straw in the current land in the soil bottom layer and in a cultivation-harvesting cycle, to obtain the amount of nutrients produced by corn and soybean straw decomposition in the soil bottom layer.

[0090] The purpose of this step is to obtain the amount of nutrients produced by unit weight of corn and soybean straw in the soil bottom layer.

[0091] As described in step S142, the amount of nutrients produced by unit weight of corn and soybean straw in the soil bottom layer can be obtained based on laboratory simulation or field test.

[0092] S1432, respectively, obtain the amount of nutrients produced by unit weight of corn and soybean straw in the current land in the soil middle layer and in a cultivation-harvesting cycle, to obtain the amount of nutrients produced by corn and soybean straw decomposition in the soil middle layer.

[0093] The purpose of this step is to obtain the amount of nutrients produced by unit weight of corn and soybean straw in the soil middle layer.

[0094] As described in step S142, the amount of nutrients produced by unit weight of corn and soybean straw in the soil middle layer can be obtained based on laboratory simulation or field test.

[0095] S1433. Sum the mass of various nutrients from the decomposition of corn stalks in the middle layer of soil and the mass of various nutrients from the decomposition of corn stalks in the bottom layer of soil, and sum the mass of various nutrients from the decomposition of soybean stalks in the middle layer of soil and the mass of various nutrients from the decomposition of soybean stalks in the bottom layer of soil, to obtain the mass of various nutrients generated by the decomposition of corn and soybean straw during the decomposition process.

[0096] The purpose of this step is to directly obtain the mass of various nutrients that corn and soybean straw can produce individually during the two tillage-harvest cycles by analyzing the amount of nutrients that can be produced during the decomposition of corn and soybean straw in the middle and bottom layers of the soil.

[0097] Among them, the amount of various nutrients generated during the two tillage-harvest cycles in the decomposition of corn stalks was established.

[0098] Among them, the amount of various nutrients generated during the two tillage-harvest cycles in the decomposition of soybean straw was established.

[0099] In the specific analysis of the amount generated, it is necessary to establish a correspondence between straw type and the type of nutrient itself in order to obtain the mass of various nutrients. For example, the forms of corn straw-potassium element-a, corn straw-phosphorus element-b, and soybean straw-nitrogen element-c were established to obtain the correspondence between straw type-element type-nutrient mass.

[0100] S1433. Based on the future nutrient requirements of the soil surface and the mass of various nutrients generated during the decomposition of corn and soybean straw, obtain the ratio of corn and soybean straw returned to the field in the current plot.

[0101] The purpose of this step is to calculate the specific ratio of various nutrients that can be provided per unit weight of corn and soybean straw, thereby obtaining the amount of corn and soybean straw to be added in the current soil subbase construction.

[0102] In this case, once the future nutrient requirements of the soil surface layer are determined, the determination results of the quantities of various nutrients can be obtained.

[0103] To better illustrate the specific steps of S1433, the technical solution for this part will be explained in detail below. Specifically: S14331. Based on the mass of various nutrients generated during the decomposition process of the corn and soybean straw returned to the field, and the future demand for various nutrients in the soil surface, establish a set of equations.

[0104] The purpose of this step is to obtain the future soil surface layer of each type of nutrient quality requirements and the correlation of each type of nutrient quality by establishing a system of equations.

[0105] The established system of equations can be expressed as: ; Wherein, T 1 ~ T n represents the future soil surface layer of each type of nutrient requirements; M c1 ~ M cn represents the future soil surface layer of each type of nutrient type corresponding to the corn stalk decomposition process generated by the corresponding nutrient quality; P c1 ~ P cn represents the corresponding corn stalk input quantity based on the corresponding nutrient quality generated by the corn stalk decomposition process and the future soil surface layer of each type of nutrient requirements; M s1 ~ M sn represents the future soil surface layer of each type of nutrient type corresponding to the soybean stalk decomposition process generated by the corresponding nutrient quality; P s1 ~ P sn represents the corresponding corn stalk input quantity based on the corresponding nutrient quality generated by the soybean stalk decomposition process and the future soil surface layer of each type of nutrient requirements.

[0106] S14332, solving the system of equations, obtaining the current land of corn and soybean of the alternative still field stalk amount matching.

[0107] The purpose of this step is to solve the equation system obtained after the construction of the equation system to obtain the possible still field stalk matching.

[0108] Wherein, based on the above equation, a plurality of data groups related to each of the following combinations of types can be obtained: P c1 , P s1 ) to ( P cn , P sn ) combination type.

[0109] Wherein, based on the future soil surface layer of each nutrient, based on the amount of corn and soybean stalks obtained by the amount of demand is able to get a data set.

[0110] Wherein, need for each nutrient, based on the future soil surface layer of nutrient demand, get all the corn and soybean data set.

[0111] S14333, get all the corn and soybean stalks combination according to the alternative still field straw amount ratio configuration, and get the volume of the crushed and uniformly mixed corn and soybean stalks combination.

[0112] The purpose of this step is to need based on the obtained alternative still field straw amount ratio, corn and soybean straw configuration, and will be crushed and uniformly mixed volume analysis, to lay the foundation for the judgment of each array.

[0113] Wherein, get all the straw amount needed to be put in the alternative straw amount ratio, and get the volume of the data set obtained.

[0114] Wherein, for all the data set, the application is not intended to completely based on the still field straw to ensure that all the amount of nutrients can be completely provided by the straw, but allows in the selected straw ratio, there is a certain nutrient higher or less than the amount of nutrients needed, but the probability of this situation needs to be minimized.

[0115] Wherein, before the volume judgment, also need to preselect the alternative still field straw amount ratio, specifically: based on soybean straw or corn straw, set the limit value of this kind of straw, for example: the selected corn straw amount is P cc Then, for all the array, the amount of corn straw is selected as the value, the amount of soybean straw.

[0116] Wherein, after getting the amount of corn straw, and based on the value of the amount of soybean straw in all the array, the average amount of soybean straw can be obtained, the equation is: ; Wherein, The amount of soybean straw; T i The amount of soybean straw; i The amount of soybean straw; M ci The amount of soybean straw; i The amount of soybean straw;P cc represents the selected corn stalks' input amount; M si represents the future soil surface layer's first i nutrient type's corresponding nutrient amount generated by the soybean stalks' decomposition process; i represents the index of the nutrient type; n represents the total index of the nutrient type.

[0117] In some embodiments, the above equation can also be used in the analysis of the parameter P cc under the action of the value, to obtain the variance of all generated P si , and based on the value, the calculation result of P cc is obtained.

[0118] S14334, when the crushed and uniformly mixed volume of the corn and soybean stalks combination is not greater than the current plot's soil bottom layer volume, the corresponding alternative straw amount ratio is obtained, and the corresponding alternative straw amount is the current plot's corn and soybean straw amount ratio.

[0119] The purpose of this step is to ensure land leveling in large areas of corn-soybean rotation, even after the selection in step S14333, considering the terrain and the inherent characteristics of the land, and to select the best ratio scheme from among them, so this step can achieve reasonable determination of the ratio parameters.

[0120] wherein, when the alternative straw amount ratio has been determined, the volumes of the two are obtained, and the volume generated after crushing and uniform mixing is determined.

[0121] wherein, the generated volume is compared with the current plot's soil bottom layer volume, and if it is found that the former is greater than the latter, it means that after returning to the field, it will occupy the position of other soil layers, so it needs to be removed from the alternative ratio.

[0122] wherein, for the determination process of the so-called current plot's soil bottom layer volume, the soil surface layer thickness is obtained according to the future second crop cycle's corresponding crop type, and the plot area is known, so the volume can be determined. That is, in the determination of the current plot's soil bottom layer volume, the future plot crop type needs to be based on the current plot's corn and soybean straw amount ratio determination.

[0123] ​As step S150, the purpose of this step is to process the soil of the soil bottom layer in the current plot, so that it can be directly buried in the soil bottom layer area that has been determined. Specifically: S151, based on the amount of corn and soybean straw returned to the field ratio, respectively determine the weight of corn and soybean straw returned to the field.

[0124] The purpose of this step is to determine the amount of straw needed to be put in, and based on the determination result, the corresponding straw is obtained.

[0125] Among them, according to the amount of straw returned to the field ratio, the weight of corn and soybean straw returned to the field is obtained according to the data obtained.

[0126] Among them, the obtained straw can also be directly mixed to facilitate subsequent crushing and mixing.

[0127] S152, based on the weight of corn and soybean straw returned to the field, the straw returned to the field is configured, and the straw returned to the field is crushed and uniformly mixed to obtain mixed straw.

[0128] The purpose of this step is to process the straw returned to the field, so as to facilitate the subsequent straw returned to the field operation.

[0129] Among them, the obtained corn straw and soybean straw are crushed and uniformly mixed after crushing.

[0130] Among them, after crushing and mixing, a certain degree of compression can be performed to avoid the problem that the volume of straw returned to the field exceeds the soil bottom layer.

[0131] Among them, the length of the crushed straw can be set according to the research results or the experience of the technical personnel.

[0132] S153, uniformly mix the soil of the soil surface of the current plot and the mixed straw to obtain straw mixed soil.

[0133] The purpose of this step is to ensure that the nutrient content of the soil can be improved, and the nutrient content of the soil surface in the future time is fully improved, and the new soil bottom layer needs to be configured.

[0134] Among them, after the current plot is harvested, all the soil of the soil surface of the current plot is obtained.

[0135] Among them, the obtained soil of the soil surface and the crushed and uniformly mixed straw are mixed, and the soil and the straw returned to the field are also uniformly mixed.

[0136] Wherein, in order to ensure that the obtained straw mixed soil can be completely buried into the soil bottom layer, appropriate pressure can be applied to the straw mixed soil to reduce the volume.

[0137] In some embodiments, considering that the deep soil of the land is in a relatively hard state, pressure needs to be applied to the straw mixed soil to ensure that the new soil bottom layer can support other soil layers.

[0138] The beneficial effect of step S150 is that after obtaining the still-field straw ratio in the new soil bottom layer, the straw needs to be treated, and the treated straw and the current soil surface soil are uniformly mixed to ensure that the nutrient substances of the soil surface layer are uniformly distributed in the future.

[0139] As described in step S160, the purpose of this step is that the still-field straw in the soil middle layer is essentially decomposed for 2 years, in which more microorganisms that promote decomposition and more decomposition accelerators appear, so that if part of the soil in the soil middle layer and the bottom layer soil are uniformly mixed, the decomposition of the still-field straw in the new bottom layer soil can be better promoted. Specifically: S161, determine the bottom area of the soil middle layer of the current land plot, and separate the soil at the bottom level from the soil middle layer of the current land plot to obtain separated soil.

[0140] The purpose of this step is to obtain a part of the soil middle layer of the current land plot and separate it.

[0141] Wherein, a certain thickness from the bottom of the current soil middle layer to the top is considered as the bottom area of the soil middle layer.

[0142] Wherein, the subsequent bottom area can be set according to experience, which is not limited in this application.

[0143] Wherein, in the specific bottom area separation, the soil layer replacement tiller can be used to adjust the soil collection thickness of the soil middle layer, and the remaining soil after collection is considered as part of the new soil bottom layer, and the two parts of soil are fully mixed.

[0144] S162, uniformly mix the separated soil and the straw mixed soil to obtain a new bottom layer soil.

[0145] The purpose of this step is to obtain a new bottom layer soil and ensure that the decomposition rate of the still-field straw in the soil is improved.

[0146] Wherein, after obtaining the separated soil, the separated soil and the straw mixed soil are fully and uniformly mixed, and the obtained soil is the new bottom layer soil.

[0147] In the mixing process of the soil, the soil can be processed based on the current developed agricultural machinery and the soil layer replacement tiller in the agricultural machinery.

[0148] The beneficial effect of step S160 is that when the part of the soil in the middle layer is mixed into the straw mixed soil, the microorganisms and the rotting agent in the soil in the middle layer can be fully utilized to improve the rotting speed of the returned straw in the new bottom layer soil.

[0149] As described in step S170, the purpose of this step is to place the new bottom layer soil into the corn-soybean rotation planting area after obtaining the new bottom layer soil to establish a new soil layer. Specifically: S171, bury the new bottom layer soil into the position of the bottom layer of the soil of the current land to form a new bottom layer of soil.

[0150] The purpose of this step is to fill the new bottom layer of soil.

[0151] In which the obtained new bottom layer soil is directly placed into the position of the bottom layer of the soil of the current land, and the newly constructed area becomes the new bottom layer of soil.

[0152] In some embodiments, after the new bottom layer of soil is constructed, a certain degree of ramming treatment is also needed to ensure that the new bottom layer of soil can effectively support the middle layer and the surface layer of the soil.

[0153] S172, lay the bottom layer of the soil of the current land on the new bottom layer of soil, and the bottom layer of the soil of the current land becomes the new middle layer of soil.

[0154] The purpose of this step is to construct other levels after the new bottom layer of soil has been obtained. The first constructed level is the middle layer of soil.

[0155] In which the bottom layer of the soil of the current land is excavated by relevant machinery such as the soil layer replacement tiller, and after the new bottom layer of soil is laid, the bottom layer of the soil of the current land is directly placed on the new bottom layer of soil.

[0156] In some embodiments, the bottom layer of the soil of the current land is rotary tilled to loosen the soil, thereby improving the air permeability of the middle layer of soil and avoiding poor air permeability of the middle layer of soil in subsequent crop cultivation.

[0157] S173, lay the middle layer of the soil of the current land on the new middle layer of soil, and the middle layer of the soil of the current land becomes the new surface layer of soil.

[0158] The purpose of this step is to build a new soil surface layer after the new soil middle layer has been obtained.

[0159] The soil middle layer of the current land is excavated by the relevant machinery such as the soil replacement tiller, and the soil middle layer of the current land is directly arranged on the new soil middle layer after the new soil middle layer is laid, and a new soil surface layer is obtained.

[0160] After the new soil surface layer is obtained, it means that the land needs to be planted with corn or soybeans, so the soil middle layer of the current land, that is, the new soil surface layer, needs to be rotary plowed to loosen the soil, thereby improving the air permeability of the soil middle layer and avoiding poor air permeability of the new soil surface layer during subsequent crop planting, which leads to crop yield reduction.

[0161] The beneficial effect of step S170 is that the position adjustment between the soil layers can ensure that the returned straw can be decomposed for a long time, while ensuring that the nutrients contained in the soil surface layer and the growth requirements of crops are matched.

[0162] The beneficial effects of the present application include: 1. The decomposition time of the returned straw is prolonged. In the technical solution of the present application, the returned straw is buried in the bottom layer of the soil, the bottom layer is adjusted to the middle layer the next year, and the third year is adjusted to the soil surface layer, and the returned straw is actually used for planting corn or soybeans. The decomposition time of the returned straw is not less than 2 years, thereby prolonging the decomposition time, effectively increasing the nutrient amount, and reducing the greenhouse gas emission.

[0163] 2. The reasonable arrangement of the returned straw is realized. In the technical solution of the present application, corn straw and soybean straw are mixed, the nutrient content of the two types of straw is different, and the mixing can effectively ensure that the returned straw can provide all types of nutrients, and the straw ratio is also designed, thereby ensuring the reasonable arrangement of the returned straw.

[0164] 3. The high decomposition of the returned straw is realized. In the soil configuration of the soil bottom layer in the technical solution of the present application, the soil middle layer is uniformly mixed, and the soil middle layer is essentially the soil bottom layer arranged last year. The content of microorganisms and the content of the decomposition accelerator in the straw are greatly improved after one year of decomposition, and the mixing can promote the decomposition of the straw in the new soil bottom layer, thereby ensuring the high decomposition of the returned straw.

[0165] Those skilled in the art can understand that all or part of the steps of the above-mentioned method embodiments can be completed by related hardware of computer program instructions. The aforementioned computer program can be stored in a nonvolatile storage medium, and when executed, the computer program executes steps including the above-mentioned method embodiments. Alternatively, the aforementioned integrated units of the present application, if implemented in the form of software function modules and sold or used as independent products, can also be stored in a nonvolatile storage medium. Based on this understanding, the technical solutions of the embodiments of the present application can be embodied in the form of a software product, which is stored in a nonvolatile storage medium and includes a number of instructions for causing an electronic device (which can be a personal computer, a server, a network device, etc.) to execute all or part of the methods described in the various embodiments of the present application.

[0166] The above merely describes the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A corn-soybean rotation planting method based on carbon sequestration and emission reduction, characterized in that, The method comprises the following steps: Based on the root depth of corn and soybean, the soil surface layer thickness of corn and soybean planting plots is obtained respectively; Based on the soil surface layer thickness of corn and soybean planting plots, the soil middle layer and the soil bottom layer of corn and soybean planting plots are obtained respectively; Based on the corn and soybean rotation cycle, the plot cultivation crop type at future time is obtained; Based on the plot cultivation crop type at future time, the corn and soybean straw returning amount ratio of the current plot is obtained; Based on the corn and soybean straw returning amount ratio of the current plot, the corn and soybean straw returning amount is obtained, and the corn and soybean straw returning amount is mixed with the soil surface layer soil to obtain straw mixed soil; Part of the soil in the soil middle layer of the current plot is separated and uniformly mixed with the straw mixed soil to obtain new bottom layer soil; The new bottom layer soil is buried in the position of the soil bottom layer of the current plot to obtain a new soil bottom layer, the soil bottom layer of the current plot is adjusted to the new soil middle layer, and the soil middle layer of the current plot is adjusted to the new soil surface layer.

2. The corn-soybean rotation planting method based on carbon sequestration and emission reduction according to claim 1, characterized in that, The method comprises the following steps: The corn and soybean varieties planted in the corn and soybean rotation area are obtained, and the root depth of the corn and soybean varieties is obtained; The maximum root depth of the corn and soybean varieties is obtained, and the maximum root depth of the corn and soybean varieties is set as the soil surface layer thickness of the corn and soybean planting plot.

3. The method according to claim 1, wherein the method is characterized by, The method comprises the following steps: The maximum soil plowing depth in the corn and soybean rotation area is obtained; The soil surface layer thickness of corn and soybean is removed from the maximum soil plowing depth to obtain a straw returning layer; The straw returning layer is layered to obtain the soil middle layer and the soil bottom layer of the current corn and soybean planting plot.

4. The method according to claim 1, wherein the method is characterized by, The method comprises the following steps: The corn and soybean rotation cycle is obtained, and the corn and soybean future cultivation plot in the future cultivation-harvesting cycle is obtained; The correspondence between the cultivation-harvesting cycle and the corn and soybean future cultivation plot is established to obtain the plot and crop correspondence; Based on the plot and crop correspondence, the cultivation crop type of all plots in the future time period is obtained.

5. The method according to claim 1, wherein the method is characterized by, The method comprises the following steps: Based on the plot cultivation crop type at future time, the future soil surface layer nutrient demand amount corresponding to the plot cultivation crop type in the second future cultivation-harvesting cycle is obtained; The amount of various nutrients generated by unit weight of corn and soybean straw returning amount in the decomposition process is obtained; Based on the amount of various nutrients generated by unit weight of corn and soybean straw returning amount in the decomposition process and the various nutrient demand amount, the corn and soybean straw returning amount ratio of the current plot is obtained.

6. The corn-soybean rotation planting method based on carbon sequestration and emission reduction according to claim 5, characterized in that, The method comprises the following steps: obtaining the quality of each type of nutrient generated by the corn and soybean straw returned to field in unit weight during the decomposition process, and the demand of each type of nutrient, and obtaining the ratio of the corn and soybean straw returned to field in the current land, including: obtaining the demand of each type of nutrient generated by the corn and soybean straw returned to field in unit weight in the current land, which is located in the bottom layer of soil and generated in one tillage-harvesting cycle, to obtain the quality of each type of nutrient generated by the corn and soybean straw returned to field in the bottom layer of soil during the decomposition process; obtaining the demand of each type of nutrient generated by the corn and soybean straw returned to field in unit weight in the current land, which is located in the middle layer of soil and generated in one tillage-harvesting cycle, to obtain the quality of each type of nutrient generated by the corn and soybean straw returned to field in the middle layer of soil during the decomposition process; summing up the quality of each type of nutrient generated by the corn straw returned to field in the middle layer of soil and the quality of each type of nutrient generated by the corn straw returned to field in the bottom layer of soil, and summing up the quality of each type of nutrient generated by the soybean straw returned to field in the middle layer of soil and the quality of each type of nutrient generated by the soybean straw returned to field in the bottom layer of soil, to obtain the quality of each type of nutrient generated by the corn and soybean straw returned to field in the decomposition process; obtaining the ratio of the corn and soybean straw returned to field in the current land based on the demand of each type of nutrient in the future top layer of soil and the quality of each type of nutrient generated by the corn and soybean straw returned to field in the decomposition process.

7. The method according to claim 6, wherein the method is characterized by, The method comprises the following steps: obtaining the ratio of the corn and soybean straw returned to field in the current land based on the demand of each type of nutrient in the future top layer of soil and the quality of each type of nutrient generated by the corn and soybean straw returned to field in the decomposition process, including: establishing an equation group based on the quality of each type of nutrient generated by the corn and soybean straw returned to field in the decomposition process and the demand of each type of nutrient in the future top layer of soil; solving the equation group to obtain the ratio of the corn and soybean straw returned to field in the current land; obtaining all combinations of the corn and soybean straw returned to field according to the ratio of the corn and soybean straw returned to field, and obtaining the volume of the crushed and uniformly mixed corn and soybean straw combination; obtaining the ratio of the corn and soybean straw returned to field corresponding to the ratio of the corn and soybean straw returned to field when the volume of the crushed and uniformly mixed corn and soybean straw combination is not greater than the volume of the bottom layer of soil in the current land, and the corresponding ratio of the corn and soybean straw returned to field is the ratio of the corn and soybean straw returned to field in the current land.

8. The method according to claim 1, wherein the method is characterized by, The method comprises the following steps: obtaining the corn and soybean straw returned to field based on the ratio of the corn and soybean straw returned to field in the current land, and mixing the corn and soybean straw returned to field with the top layer of soil to obtain straw mixed soil, including: determining the weight of the corn and soybean straw returned to field based on the ratio of the corn and soybean straw returned to field in the current land; configuring the corn and soybean straw returned to field based on the weight of the corn and soybean straw returned to field, and crushing and uniformly mixing the corn and soybean straw returned to field to obtain mixed straw; uniformly mixing the top layer of soil in the current land with the mixed straw to obtain straw mixed soil.

9. The method according to claim 1, wherein the method is characterized by, The method comprises the following steps: separating part of the middle layer of soil from the current land, and uniformly mixing the separated part of the middle layer of soil with the straw mixed soil to obtain new bottom layer soil, including: determining a bottom region of a bottom layer of soil in the current plot of land, and separating the bottom layer of soil from the middle layer of soil in the current plot of land to obtain separated soil; uniformly mixing the separated soil and the straw mixed soil to obtain new bottom layer soil.

10. The method according to claim 1, wherein the method is characterized by, the step of burying the new bottom layer soil to a position of the bottom layer of soil in the current plot of land to obtain a new bottom layer of soil, the bottom layer of soil in the current plot of land being adjusted to a new middle layer of soil, and the middle layer of soil in the current plot of land being adjusted to a new top layer of soil, comprises: burying the new bottom layer soil to a position of the bottom layer of soil in the current plot of land to form a new bottom layer of soil; laying the bottom layer of soil in the current plot of land on the new bottom layer of soil, the bottom layer of soil in the current plot of land becoming a new middle layer of soil; laying the middle layer of soil in the current plot of land on the new middle layer of soil, the middle layer of soil in the current plot of land becoming a new top layer of soil.

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