Winter wheat root system water-saving property identification method, system and device

Abstract

The invention provides a winter wheat root system water-saving property identification method, system and device, and relates to the technical field of crop water-saving property identification, intercropping is performed in a specified test area, and a competitive area and a non-competitive area are divided to calculate an area competitive index. Collecting a winter wheat root system sample in the elongation stage, analyzing the root system length and surface area of the sample in different soil depths, and generating a root system growth index; meanwhile, acquiring soil water content data, calculating the water absorption capacity and the water utilization efficiency of the winter wheat, and analyzing a root system water absorption coefficient in combination with a root system growth index; and generating a water-saving evaluation index according to the water utilization efficiency and the root water absorption coefficient, and comparing the regional competition index with a set water-saving threshold value to judge the root water-saving property of the winter wheat.

Description

Technical Field

[0001] The present invention relates to the technical field of water-saving identification of crops, and specifically to a method, system and device for identifying the water-saving property of winter wheat roots. Background Technique

[0002] In current agricultural production, the intercropping of winter wheat and corn has become a common planting pattern. Since their growth cycles are different, intercropping can make full use of resources such as soil, sunlight and water, improve resource utilization rate, and through intercropping, two crops can be obtained on the same piece of land, thereby increasing the yield per unit area of the land and conducting efficient agricultural production. However, the jointing stages of winter wheat and corn are close, both in April and May. At this stage, winter wheat and corn will compete for resources such as water and fertilizers. Therefore, it is necessary to select winter wheat with higher water-saving property for intercropping with corn to reduce the waste of resources caused by competition. At present, there is no effective method to judge the water-saving property of winter wheat based on the competition between crops.

[0003] In the existing identification of the water-saving property of winter wheat roots, the research is usually carried out in a single-crop environment, ignoring the mutual promotion and competition between crops in the intercropping mode, resulting in the evaluation results being difficult to comprehensively reflect the real field situation, and only focusing on a certain specific index, lacking a comprehensive analysis of multiple indexes, and unable to comprehensively reflect the water-saving characteristics of winter wheat roots; Therefore, the present invention combines the characteristics of the intercropping of winter wheat and corn, and proposes a comprehensive method for identifying water-saving property, which reflects the water-saving property of winter wheat in the actual environment through regional division, root growth analysis, soil moisture measurement and competition between crops, so as to play a guiding role in selecting crop varieties when intercropping winter wheat and corn.

[0004] The above information disclosed in the background art section is only used to strengthen the understanding of the background of the present disclosure, and therefore it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a method, system and device for identifying the water-saving property of winter wheat roots to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A method for identifying the water-saving property of winter wheat roots, the specific steps include:

[0008] Select an experimental area, and intercropping winter wheat and corn in the experimental area. The intercropping mode is that two rows of corn are taken as a group, and a wheat area is delimited between two groups of corn to plant winter wheat;

[0009] Divide the area between winter wheat and corn into a competition area, and the wheat area as a non-competition area. In the test area, a sampling area that includes both the competition area and the non-competition area is demarcated, and the areas of the competition area and the non-competition area in the sampling area are counted. According to the statistical results, a regional competition index is generated.

[0010] Set multiple soil depth sampling ranges. During the jointing stage, root sampling of winter wheat in the sampling area is carried out to obtain the root length and root surface area of winter wheat within different soil depth ranges, generate the root growth index of winter wheat within different soil depth ranges, and further analyze to generate the root growth index of winter wheat in the sampling area.

[0011] During the jointing stage, obtain the soil water content data of the sampling area, and generate the soil water reduction amount to represent the water absorption of winter wheat. Also obtain the total water supply of the sampling area. According to the water absorption of winter wheat and the total water supply, generate the water use efficiency. Combine the root growth index of winter wheat in the sampling area and the water absorption of winter wheat for analysis to generate the root water absorption coefficient.

[0012] Based on the water use efficiency and root water absorption coefficient of winter wheat in the sampling area, generate a water-saving evaluation index. Set a water-saving threshold, compare the water-saving evaluation index with the regional competition index and the water-saving threshold to judge the root water-saving of winter wheat.

[0013] Furthermore, the row spacing of winter wheat is 20 cm, the plant spacing is 12 cm, and the row spacing between corn and winter wheat is 30 cm.

[0014] Furthermore, the formula for generating the regional competition index is:

[0015]

[0016] Among them, Z represents the regional competition index of winter wheat in the sampling area, s1 represents the area of the competition area, and s2 represents the area of the non-competition area.

[0017] Furthermore, the principle for generating the root growth index of winter wheat in the sampling area is:

[0018] The formula for generating the root growth index is:

[0019]

[0020] Among them, M i,j represents the root growth index of the j-th winter wheat plant in the i-th soil depth range, i represents the index of the soil depth range, and i ∈ [1, 5], j represents the index of winter wheat in the sampling area, and j ∈ [1, J], J represents the number of winter wheat plants in the sampling area, L i,j represents the root length of the j-th winter wheat plant in the i-th soil depth range, Si,j Denote the root surface area of the j-th winter wheat plant in the i-th soil depth range, N j Denote the root growth index of the j-th winter wheat plant;

[0021] The formula for generating the root growth index of winter wheat in the sampling area is:

[0022]

[0023] where N denotes the root growth index of winter wheat in the sampling area.

[0024] Furthermore, the principle for generating the water use efficiency is:

[0025] The formula for generating the reduction in soil moisture is:

[0026]

[0027] where △θ i Denote the change in soil water content per unit area in the i-th soil depth range of the sampling area, S denotes the area of the sampling area, θ i (0) denotes the soil water content at the initial moment of the sampling time in the i-th soil depth range of the sampling area, θ i (t) denotes the soil water content at the final moment of the sampling time in the i-th soil depth range of the sampling area, △θ total Denote the reduction in soil moisture of the sampling area;

[0028] The formula for generating the water use efficiency is:

[0029]

[0030] W = W1 + W2

[0031] where X denotes the water use efficiency of winter wheat in the sampling area, W denotes the total water supply to the sampling area, W1 denotes the irrigation amount of the sampling area, and W2 denotes the precipitation amount of the sampling area.

[0032] Furthermore, the formula for generating the root water absorption coefficient is:

[0033] Y = △θ total ·N

[0034] where Y denotes the root water absorption coefficient of winter wheat in the sampling area, △θ total Denote the reduction in soil moisture of the sampling area, and N denotes the root growth index of winter wheat in the sampling area.

[0035] Furthermore, the formula for generating the water-saving evaluation index is:

[0036] K = w1·X + w2·Y

[0037] Among them, K represents the water-saving evaluation index of winter wheat in the sampling area, w1 and w2 respectively represent the weight coefficients of water use efficiency and root water absorption coefficient, w1 + w2 = 1, and w1 > w2.

[0038] Furthermore, the principle for judging the root water-saving property of winter wheat is:

[0039] The principle for generating the water-saving threshold is:

[0040] Select winter wheat with known water-saving levels, specifically high water-saving, medium water-saving, and low water-saving. Calculate the water-saving evaluation index of all winter wheat respectively, and obtain the range of water-saving evaluation index corresponding to high water-saving, medium water-saving, and low water-saving winter wheat. The formulas for generating the high water-saving threshold and the low water-saving threshold are:

[0041]

[0042] Among them, ε high represents the high water-saving threshold, U mid represents the highest water-saving evaluation index of medium water-saving winter wheat, D high represents the lowest water-saving evaluation index of high water-saving winter wheat, ε low represents the low water-saving threshold, U low represents the highest water-saving evaluation index of low water-saving winter wheat, D mid represents the lowest water-saving evaluation index of medium water-saving winter wheat;

[0043] Within a certain range, as the regional competition index increases, it promotes the growth and water absorption of winter wheat roots. When it reaches a certain value, this promotion reaches the maximum, and the corresponding water-saving evaluation index is the maximum. At this time, the corresponding regional competition index is Z0. After that, as the regional competition index increases, due to fierce competition, the water-saving evaluation index gradually decreases;

[0044] When the corresponding winter wheat variety in the sampling area is high water-saving;

[0045] When the corresponding winter wheat variety in the sampling area is medium water-saving;

[0046] When the corresponding winter wheat variety in the sampling area is low water-saving;

[0047] Among them, Z represents the regional competition index of winter wheat in the sampling area, represents rounding up upward.

[0048] The present invention also provides a water-saving identification system for winter wheat roots, which is used to implement the above-mentioned water-saving identification method for winter wheat roots, and specifically includes:

[0049] A crop intercropping module, which is used to select a test area, intercropping winter wheat and corn in the test area. The intercropping mode is that two rows of corn are taken as a group, and a wheat area is delimited between two groups of corn to plant winter wheat;

[0050] A competition calculation module, which is used to divide the area between winter wheat and corn into a competition area, and the wheat area as a non-competition area. A sampling area that simultaneously includes the competition area and the non-competition area is delimited in the test area, and the areas of the competition area and the non-competition area in the sampling area are counted, and a regional competition index is generated according to the statistical results;

[0051] A root system detection module, which is used to set multiple soil depth sampling ranges, sample the roots of winter wheat in the sampling area during the jointing stage, obtain the root length and root surface area of winter wheat in different soil depth ranges, generate the root growth index of winter wheat in different soil depth ranges, and further analyze to generate the root growth index of winter wheat in the sampling area;

[0052] A water detection module, which is used to obtain the soil water content data of the sampling area during the jointing stage, generate the soil water reduction amount to represent the water absorption of winter wheat, obtain the total water supply of the sampling area, generate the water use efficiency according to the water absorption of winter wheat and the total water supply, and combine and analyze the root growth index of winter wheat in the sampling area and the water absorption of winter wheat to generate the root water absorption coefficient;

[0053] A comprehensive judgment module, which is used to generate a water-saving evaluation index based on the water use efficiency and root water absorption coefficient of winter wheat in the sampling area, set a water-saving threshold, compare the water-saving evaluation index with the regional competition index and the water-saving threshold, and judge the root water-saving property of winter wheat.

[0054] The present invention also provides a water-saving identification device for winter wheat roots. The water-saving identification device for winter wheat roots includes: a memory, a processor, and a control program stored on the memory and executable on the processor. When the control program is executed by the processor, it implements the above-mentioned water-saving identification method for winter wheat roots.

[0055] Compared with the prior art, the beneficial effects of the present invention are:

[0056] The present invention generates a regional competition index by intercropping winter wheat and corn and dividing them into a competition area and a non-competition area, which can more realistically simulate the root competition situation in the actual field crop symbiotic environment, more comprehensively reflect the differences in the water absorption efficiency of winter wheat roots in different regions, and contribute to improving the scientificity and accuracy of water-saving evaluation; it also ensures better representativeness and comprehensiveness of the acquired data by sampling roots at different soil depth positions. Capturing the growth characteristics of roots in different soil layers reflects a more complete root condition; the generated root growth index can quantitatively reflect the morphological characteristics of roots, providing basic data support for subsequent water-saving analysis, and the generated water use efficiency reflects the water absorption ability of winter wheat, evaluating the water-saving performance of winter wheat roots from multiple perspectives.

[0057] The present invention also generates a water-saving evaluation index through water use efficiency and root water absorption coefficient, and combines it with the regional competition index to expand the water-saving evaluation from the sampling area to winter wheat varieties, enabling the identification of the water-saving performance of winter wheat under different planting schemes and improving the applicability of the scheme. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 It is a schematic flowchart of the method in an embodiment of the present invention;

[0059] Figure 2 It is a schematic diagram of the system module in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0060] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to specific embodiments.

[0061] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meaning understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second", and similar terms used in the present invention do not indicate any order, quantity, or importance, but are only used to distinguish different components. The terms such as "comprising" or "including" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0062] Embodiment:

[0063] Please refer to Figure 1 , the present invention provides a technical solution:

[0064] A method for identifying the water-saving property of winter wheat roots, the specific steps include:

[0065] Step 1: Select an experimental area, and interplant winter wheat and corn in the experimental area. The interplanting pattern is that two rows of corn form a group, and a wheat area is delimited between two groups of corn to plant winter wheat;

[0066] In this embodiment, a farmland with loam texture is selected as the experimental area because the physical properties of loam are stable. Compared with sandy soil and clay, it can better retain water and will not cause the soil to be too sticky, reducing experimental deviations caused by differences in soil texture under different experimental conditions;

[0067] During the life cycles of winter wheat and corn, their jointing stages are roughly the same, in April - May, and the crops grow most rapidly during the jointing stage. Therefore, only the mutual influence of their interplanting during the jointing stage is discussed, and the jointing stage is used to represent the entire life cycles of winter wheat and corn.

[0068] The row spacing of winter wheat is 20 cm, the plant spacing is 12 cm, the row spacing between corn and winter wheat is 30 cm. The row spacing of winter wheat represents the distance between two adjacent rows of winter wheat planted in the wheat area, the plant spacing represents the distance between winter wheat in the same row, and the row spacing between corn and winter wheat represents the distance between a row of corn and the wheat closest to it in the wheat area; in the experimental area, the area between two rows of corn is used as the winter wheat planting area and is planted according to the set row spacing and plant spacing; adjusting the distance between two rows of corn can adjust the area sizes of the competition area and the non-competition area. The larger the distance between two rows of corn, the larger the proportion of the non-competition area.

[0069] Step 2: Divide the area between winter wheat and corn into a competition area, and the wheat area as a non-competition area. In the experimental area, a sampling area that includes both the competition area and the non-competition area is delimited, and the areas of the competition area and the non-competition area in the sampling area are statistically counted, and a regional competition index is generated according to the statistical results;

[0070] In this embodiment, the formula for generating the regional competition index is:

[0071]

[0072] Among them, Z represents the regional competition index of winter wheat in the sampling area, s1 represents the area of the competition area, and s2 represents the area of the non-competition area.

[0073] The regional competition index reflects the influence of the competition between winter wheat and other plants on the water-saving property of winter wheat in the actual planting scenario. The regional competition index is proportional to the area of winter wheat in the competition area. The higher the regional competition index, the more intense and more the competition between winter wheat and other plants, and thus the lower the water-saving property.

[0074] In the competition area, the water and nutrients for winter wheat are relatively limited, and it is necessary to adapt to resource limitations through root system expansion or regulation, which reflects the water absorption ability of winter wheat in a harsh environment. In the non-competition area, the water and nutrients are relatively sufficient, and the roots of winter wheat can grow normally, showing the water absorption ability of winter wheat without interference. Considering both the competition area and the non-competition area can more realistically simulate the actual growth environment.

[0075] Step 3: Set multiple soil depth sampling ranges, and sample the roots of winter wheat in the sampling area during the jointing stage to obtain the root length and root surface area of winter wheat within different soil depth ranges, generate the root growth index of winter wheat within different soil depth ranges, and further analyze to generate the root growth index of winter wheat in the sampling area;

[0076] In this embodiment, 5 soil depth sampling ranges are set, specifically: surface soil, depth 0 - 20 cm; primary root layer, depth 20 - 40 cm; root growth layer, depth 40 - 60 cm; middle and deep layer, depth 60 - 80 cm; deep soil, depth 80 - 120 cm;

[0077] In this embodiment, the principle for generating the root growth index of winter wheat in the sampling area is as follows:

[0078] The formula for generating the root growth index is:

[0079]

[0080] Where M i,j represents the root growth index of the j-th winter wheat plant in the i-th soil depth range, i represents the index of the soil depth range, and i ∈ [1, 5], j represents the index of winter wheat in the sampling area, and j ∈ [1, J], J represents the number of winter wheat plants in the sampling area, L i,j represents the root length of the j-th winter wheat plant in the i-th soil depth range, S i,j represents the root surface area of the j-th winter wheat plant in the i-th soil depth range, N j represents the root growth index of the j-th winter wheat plant;

[0081] The formula for generating the root growth index of winter wheat in the sampling area is:

[0082]

[0083] Where N represents the root growth index of winter wheat in the sampling area.

[0084] The root growth index is the ratio of root length to root surface area, reflecting the morphological characteristics of winter wheat roots. The roots in each depth range are scanned by a root scanner to obtain the root length and surface area within the depth range. The higher the root growth index, the more slender and dense the roots are, and the longer they extend in the soil, thus enhancing the ability to detect and absorb water, and the stronger the water-saving ability. The average value of the root growth index of each winter wheat plant is taken to represent the root growth index of the entire sampling area.

[0085] Step 4: Obtain the soil water content data of the sampling area during the jointing stage, generate the soil water reduction amount to represent the water absorption of winter wheat, and obtain the total water supply of the sampling area. Generate the water use efficiency based on the water absorption of winter wheat and the total water supply, and combine the root growth index of winter wheat in the sampling area and the water absorption of winter wheat for analysis to generate the root water absorption coefficient;

[0086] In this embodiment, the principle for generating the water use efficiency is:

[0087] The formula for generating the soil water reduction amount is:

[0088]

[0089] where, △θ i represents the change in soil water content per unit area in the i-th soil depth range of the sampling area, S represents the area of the sampling area, θ i (0) represents the soil water content at the initial moment of the sampling time in the i-th soil depth range of the sampling area, θ i (t) represents the soil water content at the final moment of the sampling time in the i-th soil depth range of the sampling area, △θ total represents the soil water reduction amount of the sampling area.

[0090] The change in soil water content in the i-th soil depth range reflects the change in soil water content from the initial moment to the final moment during the collection period. The higher the value of △θ i , the greater the reduction in soil water content between the two time points, and the stronger the water absorption capacity of the roots. The changes in soil water content in each soil depth range are summed to generate the changes in soil water content in five soil depth ranges, which is the soil water reduction amount.

[0091] The formula for generating the water use efficiency is:

[0092]

[0093] W = W1 + W2

[0094] Among them, X represents the water use efficiency of winter wheat in the sampling area, W represents the total water supply to the sampling area, W1 represents the irrigation amount in the sampling area, and W2 represents the precipitation amount in the sampling area.

[0095] The water supply to the sampling area is obtained according to the area ratio of the sampling area to the test area.

[0096] The water use efficiency reflects the utilization efficiency of winter wheat for water resources. The higher the water absorption of winter wheat, the higher the growth of winter wheat can be achieved under less water supply, which also reflects the higher water conservation of winter wheat. The water use efficiency is directly proportional to the reduction of soil moisture in the sampling area and inversely proportional to the total water supply to the sampling area.

[0097] The formula for the root water absorption coefficient is:

[0098] Y = △θ total ·N

[0099] Among them, Y represents the root water absorption coefficient of winter wheat in the sampling area, △θ total represents the reduction of soil moisture in the sampling area, and N represents the root growth index of winter wheat in the sampling area.

[0100] The root water absorption coefficient reflects the influence of the root morphological characteristics of winter wheat on its water conservation. The reduction of soil moisture is a quantitative index of water absorption capacity, and the root growth index corrects the difference in water absorption capacity in root morphology. Under the same reduction of soil moisture, winter wheat with a higher root growth index has a stronger root water absorption capacity because its roots are longer, thinner, and have a wider extension range.

[0101] Step 5: Generate a water conservation evaluation index based on the water use efficiency and root water absorption coefficient of winter wheat in the sampling area, set a water conservation threshold, and compare the water conservation evaluation index with the regional competition index and the water conservation threshold to judge the root water conservation of winter wheat.

[0102] In this embodiment, the formula for generating the water conservation evaluation index is:

[0103] K = w1·X + w2·Y

[0104] Among them, K represents the water conservation evaluation index of winter wheat in the sampling area, w1 and w2 respectively represent the weight coefficients of the water use efficiency and the root water absorption coefficient, w1 + w2 = 1, and w1 > w2.

[0105] The water-saving evaluation index reflects the water-saving performance of winter wheat by combining its water absorption and morphological characteristics. It is directly proportional to the water use efficiency and the root water absorption coefficient. The water use efficiency directly measures the relationship between water resource input and crop water uptake, and the core goal of water-saving evaluation is to improve water resource utilization efficiency. Therefore, the weight coefficient of water use efficiency is the highest, w1 = 0.6. The root water absorption coefficient measures the impact of root morphology on water acquisition, and its influence on water-saving performance is an indirect indicator compared to water use efficiency. Thus, the weight coefficient is lower than that of water use efficiency, w2 = 0.4.

[0106] The principle for judging the root water-saving performance of winter wheat is as follows:

[0107] The principle for generating the water-saving threshold is as follows:

[0108] Select winter wheat with known water-saving levels, specifically high water-saving, medium water-saving, and low water-saving. Calculate the water-saving evaluation index for all winter wheat respectively, and obtain the range of water-saving evaluation indices corresponding to high water-saving, medium water-saving, and low water-saving winter wheat. The formulas for generating the high water-saving threshold and the low water-saving threshold are as follows:

[0109]

[0110] Among them, ε high represents the high water-saving threshold, U mid represents the highest water-saving evaluation index of medium water-saving winter wheat, D high represents the lowest water-saving evaluation index of high water-saving winter wheat, ε low represents the low water-saving threshold, U low represents the highest water-saving evaluation index of low water-saving winter wheat, D mid represents the lowest water-saving evaluation index of medium water-saving winter wheat;

[0111] Within a certain range, as the regional competition index increases, it promotes the growth and water absorption of winter wheat roots. When it reaches a certain value, this promotion reaches its maximum, and the corresponding water-saving evaluation index is the maximum. The corresponding regional competition index at this time is Z0. After that, as the regional competition index increases, due to intense competition, the water-saving evaluation index gradually decreases;

[0112] When the winter wheat variety in the corresponding sampling area is high water-saving;

[0113] When the winter wheat variety in the corresponding sampling area is medium water-saving;

[0114] When the winter wheat variety in the corresponding sampling area is low water-saving;

[0115] Among them, Z represents the regional competition index of winter wheat in the sampling area, represents the ceiling function.

[0116] It reflects the water-saving evaluation index after being regulated by the regional competition index. When Z ≤ Z0, the water-saving performance will not be reduced due to the change of Z. It is equivalent to comparing the magnitudes of K and ε high ; when Z > Z0, as the regional competition index increases, the water-saving evaluation index gradually decreases. By comparing the regulated water-saving evaluation index with the high water-saving threshold and the low water-saving threshold respectively, the water-saving performance of the winter wheat variety in the sampling area can be determined.

[0117] Please refer to Figure 2 , the present invention also provides a system for identifying the water-saving performance of winter wheat roots. The system is used to implement the method of the device for identifying the water-saving performance of winter wheat roots, and specifically includes:

[0118] A crop intercropping module, which is used to select an experimental area and intercrop winter wheat and corn in the experimental area. The intercropping pattern is that two rows of corn form a group, and a wheat area is demarcated between two groups of corn to plant winter wheat;

[0119] A competition calculation module, which is used to divide the area between winter wheat and corn into a competition area, and the wheat area as a non-competition area. A sampling area that simultaneously includes the competition area and the non-competition area is demarcated in the experimental area, and the areas of the competition area and the non-competition area in the sampling area are statistically calculated, and a regional competition index is generated according to the statistical results;

[0120] A root system detection module, which is used to set multiple soil depth sampling ranges, sample the roots of winter wheat in the sampling area during the jointing stage, obtain the root length and root surface area of winter wheat in different soil depth ranges, generate the root growth index of winter wheat in different soil depth ranges, and further analyze to generate the root growth index of winter wheat in the sampling area;

[0121] A water detection module, which is used to obtain the soil water content data of the sampling area during the jointing stage, generate the soil water reduction amount to represent the water absorption of winter wheat, obtain the total water supply of the sampling area, generate the water use efficiency according to the water absorption of winter wheat and the total water supply, and combine and analyze the root growth index of winter wheat in the sampling area and the water absorption of winter wheat to generate the root water absorption coefficient;

[0122] A comprehensive judgment module, which is used to generate a water-saving evaluation index based on the water use efficiency and root water absorption coefficient of winter wheat in the sampling area, set a water-saving threshold, compare the water-saving evaluation index in combination with the regional competition index and the water-saving threshold, and judge the root water-saving performance of winter wheat.

[0123] The present invention also provides a water-saving identification device for winter wheat roots. The water-saving identification device for winter wheat roots includes: a memory, a processor, and a control program stored on the memory and executable on the processor. When the control program is executed by the processor, the water-saving identification method for winter wheat roots described above is implemented.

[0124] The above formulas are all dimensionless and take their numerical values for calculation. The formulas are obtained by collecting a large amount of data for software simulation to obtain a formula that is closest to the actual situation. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0125] The above embodiments can be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software methods depends on the specific application and design constraints of the technical solution.

[0126] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units. They can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0127] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and all should be covered within the protection scope of the present application.

Claims

1. A method for identifying the water-saving property of winter wheat roots, characterized in that, The specific steps include: Select a test area, and intercrop winter wheat and corn in the test area. The intercropping pattern is that two rows of corn form a group, and a wheat area is demarcated between two groups of corn to plant winter wheat; Divide the area between winter wheat and corn into a competition area, and the wheat area as a non-competition area. Demarcate a sampling area in the test area that includes both the competition area and the non-competition area, and count the areas of the competition area and the non-competition area in the sampling area. Generate a regional competition index based on the statistical results; Set multiple soil depth sampling ranges, and sample the roots of winter wheat in the sampling area during the jointing stage to obtain the root lengths and root surface areas of winter wheat in different soil depth ranges. Generate the root growth index of winter wheat in different soil depth ranges and further analyze to generate the root growth index of winter wheat in the sampling area; Obtain the soil water content data of the sampling area during the jointing stage, and generate the soil water reduction amount to represent the water absorption of winter wheat, and obtain the total water supply of the sampling area. Generate the water use efficiency based on the water absorption of winter wheat and the total water supply, and combine and analyze the root growth index of winter wheat in the sampling area and the water absorption of winter wheat to generate the root water absorption coefficient; Generate a water-saving evaluation index based on the water use efficiency and root water absorption coefficient of winter wheat in the sampling area, set a water-saving threshold, and compare the water-saving evaluation index with the regional competition index and the water-saving threshold to judge the root water-saving of winter wheat.

2. The water-saving identification method for the root system of winter wheat according to claim 1, characterized in that: When intercropping crops, the row spacing of winter wheat is 20 cm, the plant spacing is 12 cm, and the row spacing between corn and winter wheat is 30 cm.

3. The water-saving identification method for winter wheat roots according to claim 1, characterized in that: The formula for generating the regional competition index is: Where Z represents the regional competition index of winter wheat in the sampling area, s1 represents the area of the competition area, and s2 represents the area of the non-competition area.

4. A method for identifying the water-saving property of winter wheat roots according to claim 1, characterized in that: The principle for generating the root growth index of winter wheat in the sampling area is: The formula for generating the root growth index is: Among them, M i,j represents the root growth index of the j-th winter wheat plant in the i-th soil depth range, where i represents the index of the soil depth range and i ∈ [1, 5], j represents the index of winter wheat in the sampling area and j ∈ [1, J], and J represents the number of winter wheat plants in the sampling area, L i,j represents the root length of the j-th winter wheat plant in the i-th soil depth range, S i,j represents the root surface area of the j-th winter wheat plant in the i-th soil depth range, N j represents the root growth index of the j-th winter wheat plant; The formula for generating the root growth index of winter wheat in the sampling area is: Where N represents the root growth index of winter wheat in the sampling area.

5. The water-saving identification method for winter wheat roots according to claim 1, characterized in that: The principle for generating the water use efficiency is: The formula for generating the soil water reduction amount is: Among them, △θ i represents the change in soil water content per unit area in the i-th soil depth range of the sampling area, S represents the area of the sampling area, and θ i (0) represents the soil water content at the initial sampling time in the i-th soil depth range of the sampling area, and θ i (t) represents the soil water content at the final sampling time in the i-th soil depth range of the sampling area. △θ total represents the amount of soil water reduction in the sampling area; The formula for generating the water use efficiency is: W = W1 + W2 Where X represents the water use efficiency of winter wheat in the sampling area, W represents the total water supply to the sampling area, W1 represents the irrigation amount of the sampling area, and W2 represents the precipitation amount of the sampling area.

6. The water-saving identification method for winter wheat roots according to claim 1, characterized in that: The formula for generating the root water absorption coefficient is: Y = △θ total ·N Among them, Y represents the root water absorption coefficient of winter wheat in the sampling area, and △θ total represents the reduction in soil moisture in the sampling area, and N represents the root growth index of winter wheat in the sampling area.

7. The method for identifying water-saving of winter wheat roots according to claim 1, characterized in that: The formula for generating the water-saving evaluation index is: K = w1·X + w2·Y Where K represents the water-saving evaluation index of winter wheat in the sampling area, w1 and w2 respectively represent the weight coefficients of water use efficiency and root water absorption coefficient, w1 + w2 = 1, and w1 > w2.

8. A method for identifying the water-saving property of winter wheat roots according to claim 7, characterized in that: The principle for judging the root water-saving of winter wheat is: The principle for generating the water-saving threshold is: Select winter wheat with known water-saving levels, specifically high water-saving, medium water-saving, and low water-saving. Calculate the water-saving evaluation index for all winter wheat respectively, and obtain the range of water-saving evaluation indexes corresponding to high water-saving, medium water-saving, and low water-saving winter wheat. The formulas for generating the high water-saving threshold and the low water-saving threshold are as follows: Among them, ε high represents the high water-saving threshold, U mid represents the highest water-saving evaluation index of medium water-saving winter wheat, D high represents the lowest water-saving evaluation index of high water-saving winter wheat, ε low represents the low water-saving threshold, U low represents the highest water-saving evaluation index of low water-saving winter wheat, D mid represents the lowest water-saving evaluation index of medium water-saving winter wheat; Within a certain range, as the regional competition index increases, it promotes the root growth and water absorption of winter wheat. When it reaches a certain value, this promotion reaches the maximum, and the corresponding water-saving evaluation index is the maximum. At this time, the corresponding regional competition index is Z0. After that, as the regional competition index increases, due to intense competition, the water-saving evaluation index gradually decreases; When The winter wheat variety in the corresponding sampling area is highly water-saving; When the corresponding winter wheat variety in the sampling area is of medium water-saving property; When the winter wheat variety in the corresponding sampling area is of low water-saving property; Among them, Z represents the regional competition index of winter wheat in the sampling area, denotes the ceiling function.

9. A water-saving identification system for winter wheat roots, characterized in that: The system is used to implement the winter wheat root water-saving identification method described in any one of claims 1-8, specifically including: A crop intercropping module, which is used to select a test area and intercroppingly plant winter wheat and corn in the test area. The intercropping pattern is that two rows of corn are in a group, and a wheat area is demarcated between two groups of corn to plant winter wheat; A competition calculation module, which is used to divide the area between winter wheat and corn into a competition area, and the wheat area as a non-competition area. A sampling area that includes both the competition area and the non-competition area is demarcated in the test area, and the areas of the competition area and the non-competition area in the sampling area are counted, and a regional competition index is generated according to the statistical results; A root detection module, which is used to set multiple soil depth sampling ranges, sample the roots of winter wheat in the sampling area during the jointing stage, obtain the root length and root surface area of winter wheat in different soil depth ranges, generate the root growth index of winter wheat in different soil depth ranges, and further analyze to generate the root growth index of winter wheat in the sampling area; A water detection module, which is used to obtain the soil water content data of the sampling area during the jointing stage, generate the soil water reduction amount to represent the water absorption of winter wheat, and obtain the total water supply of the sampling area. The water use efficiency is generated according to the water absorption of winter wheat and the total water supply, and the root water absorption coefficient is generated by combining the root growth index of winter wheat in the sampling area and the water absorption of winter wheat for analysis; A comprehensive judgment module, which is used to generate a water-saving evaluation index based on the water use efficiency and the root water absorption coefficient of winter wheat in the sampling area, set a water-saving threshold, compare the water-saving evaluation index with the regional competition index and the water-saving threshold, and judge the root water-saving of winter wheat.

10. An identification device for water-saving of winter wheat roots, characterized in that: The winter wheat root water-saving identification device includes: a memory, a processor, and a control program stored on the memory and executable on the processor. When the control program is executed by the processor, it implements the winter wheat root water-saving identification method described in any one of claims 1-8.

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