Soil health evaluation method and device based on multiple functions of soil

Abstract

The invention relates to a soil health evaluation method and device based on soil multifunction, and the method comprises the steps: collecting a soil health index value of a to-be-evaluated region according to a preset collection index; performing function division on the collection indexes to obtain a plurality of soil function categories; respectively calculating soil function scores corresponding to a plurality of soil function categories according to the soil health index values; performing clustering analysis on the plurality of soil function categories of the to-be-evaluated region to obtain weight distribution of the soil function categories; according to the weight distribution and the soil function score, calculating to obtain a soil multifunctional index of the to-be-evaluated region; and performing soil health evaluation on the to-be-evaluated area according to the soil multifunctional index to obtain an evaluation grade. According to the invention, the performance of the soil in different functional aspects can be reflected more accurately, and the soil health condition can be evaluated accurately.

Description

Technical Field

[0001] The present invention relates to the technical field of soil health assessment, and in particular to a soil health assessment method and device based on soil multifunctionality. Background Art

[0002] Soil is the foundation of terrestrial ecosystem functions and is central to agriculture and sustainable development. The importance of soil health is becoming increasingly prominent as global agricultural soil degradation and climate change threaten the sustainability of food production. Ecosystem multifunctionality refers to the multiple functions of an ecosystem in terms of biogeochemical cycles, energy flows, and biodiversity. These functions are interrelated and together support the health, stability, and sustainable development of an ecosystem.

[0003] However, the current soil health evaluation method does not consider the synergy and trade-off between various soil functions, which results in the inability to reflect the essential characteristics of soil health and insufficient evaluation accuracy. Therefore, providing an optimization method for soil health evaluation from the perspective of soil function to improve the efficiency and representativeness of soil health evaluation has become a new trend in technological development. Summary of the invention

[0004] The present invention provides a soil health evaluation method and device based on soil multifunctionality, so as to solve the defects of the prior art.

[0005] The first aspect of the present invention provides a soil health assessment method based on soil multifunctionality, comprising: S1: Collect soil health index values ​​of the area to be evaluated according to the preset collection indicators; S2: functionally classifying the collected indicators to obtain multiple soil functional categories; S3: Calculating soil function scores corresponding to multiple soil function categories respectively according to the soil health index values; S4: cluster analysis is performed on multiple soil functional categories in the area to be evaluated to obtain the weight distribution of soil functional categories; S5: Calculate and obtain the soil multifunctional index of the area to be evaluated according to the weight distribution and the soil functional score; S6: Conduct soil health assessment on the area to be assessed based on the soil multifunctional index to obtain an assessment grade.

[0006] According to a soil health assessment method based on soil multifunctionality provided by the present invention, the collection indicators in step S1 include: Longitude, latitude, aspect, slope, elevation, average annual temperature, annual precipitation, normalized difference vegetation index, soil texture, soil water content, bulk density, aggregate stability, organic carbon, total nitrogen, total phosphorus, total potassium, available phosphorus, ammonia nitrogen, nitrate nitrogen, available potassium, microbial biomass carbon, microbial biomass nitrogen, microbial biomass phosphorus, soil respiration, β-glucosidase, N-acetylglucosaminidase, acid phosphatase, leucine aminopeptidase, microbial residue amount, and microbial diversity index.

[0007] According to a soil health assessment method based on soil multifunctionality provided by the present invention, the soil function categories in step S2 include: Crop production function, the collection indicators corresponding to the crop production function include: longitude, latitude, aspect, slope, elevation, annual average temperature, annual precipitation, soil moisture content, and normalized vegetation index; Carbon sequestration function, the collection indicators corresponding to the carbon sequestration function include: soil texture, bulk density, soil organic carbon, microbial biomass carbon, soil respiration, and β-glucosidase; Water regulation function, the collection indicators corresponding to the water regulation function include: bulk density, soil moisture content, and aggregate stability; Nutrient cycle function, the collection indicators corresponding to the nutrient cycle function include: soil organic carbon, total nitrogen, total phosphorus, total potassium, ammonium nitrogen, nitrate nitrogen, available phosphorus, available potassium, microbial biomass carbon, microbial biomass nitrogen, microbial biomass phosphorus, soil respiration, β-glucosidase, leucine aminopeptidase, N-acetylglucosaminidase, acid phosphatase; Biodiversity function, the collection indicators corresponding to the biodiversity function include: microbial biomass carbon, microbial biomass nitrogen, microbial biomass phosphorus, soil respiration, β-glucosidase, leucine aminopeptidase, N-acetylglucosaminidase, acid phosphatase, microbial residue amount, and microbial diversity index.

[0008] According to a soil health assessment method based on soil multifunctionality provided by the present invention, the expression of the soil function score in step S3 is:

[0009] in, is the soil functional category index value, For the The soil function scores corresponding to the soil function categories are: To collect the index value of the indicator, is the total number of collected indicators included in the current soil functional category, For the The normalized value of the soil health index value of each collected indicator.

[0010] According to a soil health assessment method based on soil multifunctionality provided by the present invention, step S4 further comprises: S41: Cluster analysis was performed on a single soil functional category to obtain multiple cluster branches; S42: weight each clustering branch equally to obtain an initial weight; S43: according to the initial weight, weight-averaging the multiple collection indicators under the current clustering branch to obtain the indicator weight value of each collection indicator included in the current soil function category; S44: Accumulate the indicator weight value of each collection indicator included in the current soil function category to obtain the function weight value of the current soil function category, and output the function weight values ​​of all soil function categories as weight distribution.

[0011] According to a soil health evaluation method based on soil multifunctionality provided by the present invention, the expression of the soil multifunctionality index in step S5 is:

[0012] in, is the soil multifunctional index of the area to be evaluated, is the soil functional category index value, is the soil functional category of the area to be evaluated, For the The soil function scores corresponding to the soil function categories are: For the The functional weight value corresponding to each soil functional category.

[0013] According to a soil health evaluation method based on soil multifunctionality provided by the present invention, the evaluation level in step S6 specifically includes: When the soil multifunctional index When , the evaluation level is the first health level; When the soil multifunctional index When , the evaluation level is the second health level; When the soil multifunctional index When the evaluation level is the third health level; When the soil multifunctional index When the evaluation level is the fourth health level; When the soil multifunctional index , the evaluation level is the fifth health level.

[0014] The second aspect of the present invention provides a soil health assessment device based on soil multifunctionality, comprising: Collection module: used to collect soil health index values ​​of the area to be evaluated according to preset collection indicators; Division module: used for functional division of the collected indicators to obtain multiple soil functional categories; A first calculation module: used to calculate soil function scores corresponding to multiple soil function categories according to the soil health index value; Clustering module: used to perform cluster analysis on multiple soil functional categories in the evaluation area and obtain the weight distribution of soil functional categories; The second calculation module is used to calculate the soil multifunctional index of the area to be evaluated according to the weight distribution and the soil functional score; Evaluation module: used to evaluate the soil health of the area to be evaluated according to the soil multifunctional index to obtain an evaluation grade.

[0015] The third aspect of the present invention provides a soil health assessment device based on soil multifunctionality, comprising: A memory and at least one processor, wherein instructions are stored in the memory; At least one of the processors calls the instructions in the memory to enable a soil health assessment device based on soil multifunctionality to execute a soil health assessment method based on soil multifunctionality as described in any one of the above.

[0016] A fourth aspect of the present invention provides a computer-readable storage medium having instructions stored thereon, and when the instructions are executed by a processor, a soil health assessment method based on soil multifunctionality as described in any one of the above items is implemented.

[0017] The present invention provides a soil health evaluation method, device, equipment and storage medium based on soil multifunctionality. Through preset collection indicators, it is possible to comprehensively obtain multi-dimensional information reflecting soil health. The indicators of the present invention include but are not limited to soil physical properties (such as texture, structure), chemical properties (such as nutrient content, pH), biological properties (such as microbial community structure, enzyme activity), etc. Comprehensive data collection provides a solid foundation for subsequent soil function division and score calculation, making the evaluation results more systematic and accurate; secondly, the present invention divides the collected soil health index values ​​into functional categories to obtain multiple soil function categories, which helps to deeply understand the multiple roles and values ​​of soil in the ecosystem, making the evaluation more refined and targeted, and being able to more accurately reflect the performance of soil in different functions; and Secondly, the present invention determines the weight distribution of soil function categories through cluster analysis, which can take into account the relative importance of different soil functions, avoids the subjective and arbitrary weight allocation problems that may exist in traditional evaluation methods, and makes the evaluation results more objective and reasonable; in addition, the present invention calculates the soil multifunctional index based on the weight distribution and the soil function score, and the obtained index is a quantitative indicator that comprehensively reflects the soil health level. It is not only easy to understand and compare, but also can intuitively reflect the overall performance of the soil in the multifunctional aspects of the evaluated area, and provides a scientific basis for soil management and protection; the present invention divides the evaluated area into different evaluation levels according to the soil multifunctional index, which helps decision makers to take corresponding soil management and protection measures according to the evaluation results, facilitates practical operations, and improves the sustainable utilization level of soil resources.

[0018] The present invention aims to provide an evaluation method for comprehensively and accurately evaluating soil health status. Generally speaking, the present invention can comprehensively reflect soil health status and comprehensively evaluate the multifunctionality of soil from three aspects of physics, chemistry and biology. The present invention adopts a multi-factor analysis method to establish a scientific comprehensive evaluation model, and the evaluation results are more accurate and reliable. In addition, the evaluation technology of the present invention is more in line with the actual agricultural production in some black soil areas, and can provide scientific soil management suggestions for farming, and promote sustainable agricultural development. The evaluation results of the present invention are clearly graded, which can help improve soil health status and increase crop yield and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1A schematic flow chart of a soil health assessment method based on soil multifunctionality provided in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a soil health assessment device based on soil multifunctionality provided in an embodiment of the present invention; Figure 3 A schematic diagram of the calculation results of the soil function scores of the area to be evaluated in the soil function category provided in an embodiment of the present invention.

[0021] Reference numerals: 100, acquisition module; 200, division module; 300, first calculation module; 400, clustering module; 500, second calculation module; 600, evaluation module. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments, and they should not be understood as limitations on the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In the description of the present invention, it should be understood that the terms used are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] According to the following Figures 1 to 3 Embodiments of the present invention are described.

[0024] like Figure 1 As shown, the present invention provides a soil health assessment method based on soil multifunctionality, comprising: S1: Collect soil health index values ​​of the area to be evaluated according to the preset collection indicators.

[0025] The collection indicators in step S1 include: Longitude, latitude, aspect, slope, elevation, average annual temperature, annual precipitation, normalized difference vegetation index, soil texture, soil water content, bulk density, aggregate stability, organic carbon, total nitrogen, total phosphorus, total potassium, available phosphorus, ammonia nitrogen, nitrate nitrogen, available potassium, microbial biomass carbon, microbial biomass nitrogen, microbial biomass phosphorus, soil respiration, β-glucosidase, N-acetylglucosaminidase, acid phosphatase, leucine aminopeptidase, microbial residue amount, and microbial diversity index.

[0026] In a specific embodiment, three evaluation plots A, B, and C are first selected, and the soil types of the farmland plots in the three areas are black soil, black calcium soil, and aeolian sandy soil, respectively. After selecting the evaluation plots, the present invention collects 0-20 cm soil samples by background data collection and field investigation, and adopts a grid sampling method. During the sampling process, three sample plots of 20 m×10 m in size with similar altitude, slope aspect, and slope are selected (each sample plot is at least 20 m apart). In each sample plot, a soil drill is used to randomly collect 0-20 cm soil layers from 10 to 15 sites using the "S" type sampling method. After mixing on site, a mixed soil sample is made, and the representative soil sample is placed in a sterile self-sealing bag and numbered, and stored at low temperature and taken back to the laboratory.

[0027] The impurities such as plant roots, straw and stones were picked out from the soil samples, and the soil samples were divided into two parts. One part was used to measure soil water content (SWC), soil enzyme activity and other indicators; the other soil sample was air-dried and passed through a 0.25 mm sieve to measure soil organic carbon (SOC), total nitrogen (TN) and available phosphorus (Olsen-P) and other soil nutrient contents. During sampling, the geographical coordinates (i.e. longitude and latitude) and elevation of each sampling point were recorded using the global positioning system (GPS). The meteorological data in the study came from the Loess Plateau Science Data Center with a spatial resolution of 1 km. The historical mean annual temperature (MAT) and mean annual precipitation (MAP) data for 24 years were obtained by calculating the average value.

[0028] Among them, climate indicators include: annual average temperature and annual precipitation; topography includes: longitude, latitude, aspect, slope, elevation, longitude, latitude, and normalized vegetation index; soil physical indicators include: bulk density, soil moisture content, and aggregate stability; soil chemical indicators include: organic carbon, total nitrogen, total phosphorus, total potassium, ammonia nitrogen, nitrate nitrogen, available phosphorus, available potassium, conductivity, and pH; soil biological indicators include: microbial biomass carbon, microbial biomass nitrogen, soil respiration, soil enzyme activity (β-glucosidase, leucine aminopeptidase, acetyl glucosidase, acid phosphatase), microbial diversity (bacteria, fungi), and microbial residues (bacteria, fungi).

[0029] S2: Functionally classifying the collected indicators to obtain a plurality of soil functional categories.

[0030] Wherein, the soil functional categories in step S2 include: Crop production function, the collection indicators corresponding to the crop production function include: longitude, latitude, aspect, slope, elevation, annual average temperature, annual precipitation, soil moisture content, and normalized vegetation index; Carbon sequestration function, the collection indicators corresponding to the carbon sequestration function include: soil texture, bulk density, soil organic carbon, microbial biomass carbon, soil respiration, and β-glucosidase; Water regulation function, the collection indicators corresponding to the water regulation function include: bulk density, soil moisture content, and aggregate stability; Nutrient cycle function, the collection indicators corresponding to the nutrient cycle function include: soil organic carbon, total nitrogen, total phosphorus, total potassium, ammonium nitrogen, nitrate nitrogen, available phosphorus, available potassium, microbial biomass carbon, microbial biomass nitrogen, microbial biomass phosphorus, soil respiration, β-glucosidase, leucine aminopeptidase, N-acetylglucosaminidase, acid phosphatase; Biodiversity function, the collection indicators corresponding to the biodiversity function include: microbial biomass carbon, microbial biomass nitrogen, microbial biomass phosphorus, soil respiration, β-glucosidase, leucine aminopeptidase, N-acetylglucosaminidase, acid phosphatase, microbial residue amount, and microbial diversity index.

[0031] Furthermore, the present invention divides soil functions into five categories: crop production, carbon sequestration, water regulation, nutrient cycling and biodiversity. Each soil function is associated with the above-mentioned multiple soil indicators. In order to quantify the soil functions, the soil indicators can be divided into corresponding soil function categories according to the relationship between the soil indicators and the various functions. Through this classification, quantitative evaluation of various soil functions can be achieved.

[0032] S3: Calculate soil function scores corresponding to multiple soil function categories according to the soil health index values.

[0033] Wherein, the expression of the soil function score in step S3 is:

[0034] in, is the soil functional category index value, For the The soil function scores corresponding to the soil function categories are: To collect the index value of the indicator, is the total number of collected indicators included in the current soil functional category, For the The normalized value of the soil health index value of each collected indicator.

[0035] In a specific embodiment, based on the three plots selected above and the corresponding collected soil health index values, the index values ​​of various soil functions calculated by the method in step S3 are respectively shown in Table 1.

[0036] Table 1 Soil function scores corresponding to soil function categories in each region

[0037] S4: Perform cluster analysis on multiple soil functional categories in the evaluation area to obtain the weight distribution of soil functional categories.

[0038] Wherein, step S4 further comprises: S41: Cluster analysis is performed on a single soil functional category to obtain multiple cluster branches.

[0039] S42: Evenly distribute the weights of each clustering branch to obtain initial weights.

[0040] S43: According to the initial weight, weight-average the multiple collection indicators under the current clustering branch to obtain the indicator weight value of each collection indicator included in the current soil function category.

[0041] S44: Accumulate the indicator weight value of each collection indicator included in the current soil function category to obtain the function weight value of the current soil function category, and output the function weight values ​​of all soil function categories as weight distribution.

[0042] In steps S41 to S44, the cluster branches are first determined. That is, according to the cluster dendrogram, there are p branches, and the initial weight of each branch is ; The weight of the branch is then evenly distributed to each indicator under it. The weight of each branch in the soil crop production function is: that is, if there is 1 indicator under branch 1, the weight of branch 1 is , there are 4 indicators under branch 2, then the weight of each indicator of branch 2 is After calculation, we can get the total weight of the current soil category = branch 1 + branch 2 + … + branch p. Finally, we can get the total weights of crop production, carbon sequestration, nutrient cycling, water regulation, and biodiversity as 0.58, 0.78, 0.20, 0.75, and 0.5, respectively. After normalizing the total weights, we can get the normalized weights of crop production, carbon sequestration, nutrient cycling, water regulation, and biodiversity as 0.20, 0.28, 0.07, 0.27, and 0.18, respectively.

[0043] S5: Calculate and obtain the soil multifunctional index of the area to be evaluated based on the weight distribution and the soil functional score.

[0044] The expression of the soil multifunctional index in step S5 is:

[0045] in, is the soil multifunctional index of the area to be evaluated, is the soil functional category index value, is the soil functional category of the area to be evaluated, For the The soil function scores corresponding to the soil function categories are: For the The functional weight value corresponding to each soil functional category.

[0046] In a specific embodiment, the soil multifunctional index calculated for the above three regions A, B and C is shown in Table 2.

[0047] Table 2 Soil multifunctional index corresponding to each region

[0048] S6: Conduct soil health assessment on the area to be assessed based on the soil multifunctional index to obtain an assessment grade.

[0049] The evaluation levels in step S6 specifically include: When the soil multifunctional index When , the evaluation level is the first health level; When the soil multifunctional index When , the evaluation level is the second health level; When the soil multifunctional index When the evaluation level is the third health level; When the soil multifunctional index When the evaluation level is the fourth health level; When the soil multifunctional index , the evaluation level is the fifth health level.

[0050] In a specific embodiment, the soil multifunctional index calculated in step S5 can be graded according to the rating standard in step S6. According to the grading standard of the soil multifunctional index, the index of area A belongs to the higher fourth health level, area B is at the middle third health level, and area C is at the lower second health level. This difference reflects the difference in soil health conditions in various regions.

[0051] like Figure 3 As shown, the evaluation method based on the present invention and the obtained health level can be used for subsequent analysis of the regional characteristics of various soil functions. Figure 3 In the image, the red area represents area A, the blue area represents area B, and the green area represents area C. The radar chart shows the scores of five soil functions, including crop production, carbon sequestration, nutrient cycling, water regulation, and biodiversity.

[0052] Depend on Figure 3It can be seen that the crop production capacity of regions A and B is relatively high, with scores of 0.52 and 0.60 respectively, which indicates that the soil conditions in these two regions are more suitable for agricultural activities and can support higher crop yields. In contrast, the crop production capacity score of region C is only 0.20, showing low production potential, indicating that the soil conditions in the region are not conducive to crop growth, and measures need to be taken to improve soil quality to increase agricultural output. Carbon sequestration capacity is an important indicator for assessing the ability of soil to adapt to climate change. In this regard, region A scored higher, indicating that its soil has a strong ability to absorb and store carbon dioxide. This strong carbon sequestration capacity helps to reduce the concentration of carbon dioxide in the atmosphere, thereby alleviating the impact of climate change. The carbon sequestration function scores of regions B and C are 0.44 and 0.25 respectively, showing relatively low carbon sequestration capacity. The lack of carbon sequestration capacity may weaken the ability of these regions to cope with climate change and increase the vulnerability of soil and ecosystems to climate fluctuations. Therefore, in order to improve adaptability to climate change, it is urgent to take measures to improve soil management and enhance the carbon sequestration capacity of soil.

[0053] In addition, nutrient cycling capacity plays a key role in maintaining soil health and supporting plant growth. Region A performed well in this regard, indicating that its soil can effectively support the nutritional needs of crops. Region B's nutrient cycling capacity is at a medium level, while Region C performed poorly, which may lead to soil infertility and affect crop yields. Water regulation capacity is another important indicator for assessing soil quality, especially in the face of extreme climate events. Region A has a strong water regulation capacity, which can effectively maintain soil moisture and reduce water loss, while Region B has a relatively weak water regulation capacity. Region C has the least water regulation capacity, which may limit the normal growth of crops under drought conditions. Finally, biodiversity is an important indicator for measuring ecosystem stability. Region A's biodiversity score is 0.72, indicating that its ecosystem can support the survival and reproduction of a variety of organisms, thereby maintaining ecological balance. In contrast, regions B and C have lower biodiversity, which may increase the vulnerability of the ecosystem and reduce its ability to cope with changes in the external environment. Therefore, enhancing biodiversity is of great significance to improving the stability of regional ecosystems.

[0054] Overall, region A performed relatively well in various soil functional indicators, especially in carbon sequestration, nutrient cycling and water regulation, indicating that the region has good agricultural production potential and ecological stability. Region B performed well in crop production and nutrient cycling, but was relatively weak in water regulation and carbon sequestration. Region C performed poorly in all functions, especially in crop production, carbon sequestration and water regulation, which shows that the soil quality in the region is poor and agricultural production and ecological stability face challenges. Therefore, effective measures are urgently needed for soil improvement, nutrient management and water resource management in region C to improve its agricultural production capacity and climate change adaptation capacity.

[0055] like Figure 2 As shown, the present invention provides a soil health assessment device based on soil multifunctionality, comprising: Collection module: used to collect soil health index values ​​of the area to be evaluated according to preset collection indicators; Division module: used for functional division of the collected indicators to obtain multiple soil functional categories; A first calculation module: used to calculate soil function scores corresponding to multiple soil function categories according to the soil health index value; Clustering module: used to perform cluster analysis on multiple soil functional categories in the evaluation area and obtain the weight distribution of soil functional categories; The second calculation module is used to calculate the soil multifunctional index of the area to be evaluated according to the weight distribution and the soil functional score; Evaluation module: used to evaluate the soil health of the area to be evaluated according to the soil multifunctional index to obtain an evaluation grade.

[0056] The present invention also provides a soil health assessment device based on soil multifunctionality, comprising: A memory and at least one processor, wherein instructions are stored in the memory; At least one of the processors calls the instructions in the memory to enable a soil health assessment device based on soil multifunctionality to execute a soil health assessment method based on soil multifunctionality as described in any one of the above.

[0057] The present invention also provides a computer-readable storage medium having instructions stored thereon, and when the instructions are executed by a processor, a soil health assessment method based on soil multifunctionality as described in any one of the above items is implemented.

[0058] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0059] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0060] The present invention provides a soil health evaluation method, device, equipment and storage medium based on soil multifunctionality. By establishing a health evaluation technology system based on soil multifunctionality, a comprehensive and scientific evaluation of soil health status is achieved. Through standardized processing, clustering evaluation, and synergy and trade-off analysis, not only the accuracy and scientificity of soil health evaluation are improved, but also important method support is provided for agricultural production and environmental protection. The present invention has broad application prospects.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A soil health assessment method based on soil multifunctionality, characterized in that: include: S1: Collect soil health index values ​​of the area to be evaluated according to the preset collection indicators; S2: functionally classifying the collected indicators to obtain multiple soil functional categories; S3: Calculating soil function scores corresponding to multiple soil function categories respectively according to the soil health index values; S4: cluster analysis is performed on multiple soil functional categories in the area to be evaluated to obtain the weight distribution of soil functional categories; S5: Calculate and obtain the soil multifunctional index of the area to be evaluated according to the weight distribution and the soil functional score; S6: Conduct soil health assessment on the area to be assessed based on the soil multifunctional index to obtain an assessment grade.

2. A soil health assessment method based on soil multifunctionality according to claim 1, characterized in that: The collection indicators in step S1 include: Longitude, latitude, aspect, slope, elevation, average annual temperature, annual precipitation, normalized difference vegetation index, soil texture, soil water content, bulk density, aggregate stability, organic carbon, total nitrogen, total phosphorus, total potassium, available phosphorus, ammonia nitrogen, nitrate nitrogen, available potassium, microbial biomass carbon, microbial biomass nitrogen, microbial biomass phosphorus, soil respiration, β-glucosidase, N-acetylglucosaminidase, acid phosphatase, leucine aminopeptidase, microbial residue amount, and microbial diversity index.

3. A soil health assessment method based on soil multifunctionality according to claim 2, characterized in that: The soil function categories in step S2 include: Crop production function, the collection indicators corresponding to the crop production function include: longitude, latitude, aspect, slope, elevation, annual average temperature, annual precipitation, soil moisture content, and normalized vegetation index; Carbon sequestration function, the collection indicators corresponding to the carbon sequestration function include: soil texture, bulk density, soil organic carbon, microbial biomass carbon, soil respiration, and β-glucosidase; Water regulation function, the collection indicators corresponding to the water regulation function include: bulk density, soil moisture content, and aggregate stability; Nutrient cycle function, the collection indicators corresponding to the nutrient cycle function include: soil organic carbon, total nitrogen, total phosphorus, total potassium, ammonium nitrogen, nitrate nitrogen, available phosphorus, available potassium, microbial biomass carbon, microbial biomass nitrogen, microbial biomass phosphorus, soil respiration, β-glucosidase, leucine aminopeptidase, N-acetylglucosaminidase, acid phosphatase; Biodiversity function, the collection indicators corresponding to the biodiversity function include: microbial biomass carbon, microbial biomass nitrogen, microbial biomass phosphorus, soil respiration, β-glucosidase, leucine aminopeptidase, N-acetylglucosaminidase, acid phosphatase, microbial residue amount, and microbial diversity index.

4. The soil health assessment method based on soil multifunctionality according to claim 1, characterized in that: The expression of the soil function score in step S3 is: in, is the soil functional category index value, For the The soil function scores corresponding to the soil function categories are: To collect the index value of the indicator, is the total number of collected indicators included in the current soil functional category, For the The normalized value of the soil health index value of each collected indicator.

5. The soil health assessment method based on soil multifunctionality according to claim 1, characterized in that: Step S4 further comprises: S41: Cluster analysis was performed on a single soil functional category to obtain multiple cluster branches; S42: weight each clustering branch equally to obtain an initial weight; S43: according to the initial weight, weight-averaging the multiple collection indicators under the current clustering branch to obtain the indicator weight value of each collection indicator included in the current soil function category; S44: Accumulate the indicator weight value of each collection indicator included in the current soil function category to obtain the function weight value of the current soil function category, and output the function weight values ​​of all soil function categories as weight distribution.

6. The soil health assessment method based on soil multifunctionality according to claim 1, characterized in that: The expression of the soil multifunctional index in step S5 is: in, is the soil multifunctional index of the area to be evaluated, is the soil functional category index value, is the soil functional category of the area to be evaluated, For the The soil function scores corresponding to the soil function categories are: For the The functional weight value corresponding to each soil functional category.

7. The soil health assessment method based on soil multifunctionality according to claim 1, characterized in that: The evaluation level in step S6 specifically includes: When the soil multifunctional index When , the evaluation level is the first health level; When the soil multifunctional index When , the evaluation level is the second health level; When the soil multifunctional index When the evaluation level is the third health level; When the soil multifunctional index When the evaluation level is the fourth health level; When the soil multifunctional index , the evaluation level is the fifth health level.

8. A soil health assessment device based on soil multifunctionality, characterized in that: include: Collection module: used to collect soil health index values ​​of the area to be evaluated according to preset collection indicators; Division module: used for functional division of the collected indicators to obtain multiple soil functional categories; A first calculation module: used to calculate soil function scores corresponding to multiple soil function categories according to the soil health index value; Clustering module: used to perform cluster analysis on multiple soil functional categories in the evaluation area and obtain the weight distribution of soil functional categories; The second calculation module is used to calculate the soil multifunctional index of the area to be evaluated according to the weight distribution and the soil functional score; Evaluation module: used to evaluate the soil health of the area to be evaluated according to the soil multifunctional index to obtain an evaluation grade.

9. A soil health assessment device based on soil multifunctionality, characterized in that: include: A memory and at least one processor, wherein instructions are stored in the memory; At least one of the processors calls the instructions in the memory to enable a soil health assessment device based on soil multifunctionality to execute a soil health assessment method based on soil multifunctionality as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed by the processor, a soil health assessment method based on soil multifunctionality as described in any one of claims 1 to 7 is implemented.

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