Cultivated land soil environment quality classification method

Abstract

The invention provides a cultivated land soil environment quality classification method which comprises the following steps: constructing a soil environment quality comprehensive evaluation method based on a linked list method, and evaluating the environment quality grade of a soil heavy metal monitoring point; on the basis of soil heavy metals, spatial interpolation is carried out by adopting a grading adaptive distance weighting method, and then soil is divided into three grade areas according to an evaluation method; on the basis of an agricultural product environment quality evaluation result, interpolation is carried out by adopting the same method, and agricultural products are also divided into three grade areas; and integrating the grading results, and introducing an agricultural product enrichment coefficient to obtain a regional cultivated land soil environment quality classification result under multiple situations. The invention constructs a soil environment quality evaluation method, fully considers the complex nonlinear relationship between soil and agricultural products, develops agricultural product collaborative study and judgment, and realizes point-to-surface regional cultivated land soil environment quality evaluation by adopting a hierarchical adaptive distance weighting method, so that the result is more objective and authentic.

Description

technical field

[0001] The invention belongs to the technical field of soil quality evaluation, and relates to a method for classifying cultivated land soil environment quality. Background technique

[0002] With the acceleration of urbanization and industrialization, the problem of soil pollution has gradually become more prominent. Therefore, it is necessary to restore and manage the soil to ensure the quality and safety of the corresponding agricultural products. Therefore, the evaluation and classification of soil quality play an important role in soil restoration and cultivated land management.

[0003] In terms of soil evaluation methods, currently commonly used soil heavy metal pollution evaluation methods mainly include index methods, such as single pollution index, Nemerow comprehensive index method, enrichment factor method, etc., and there are also model methods, such as fuzzy number method and gray clustering method , Analytical Hierarchy Process, etc. However, ...

Examples

Embodiment 1

[0108] This embodiment provides a method for classifying cultivated land soil environmental quality, the technical roadmap of the method is as follows figure 1 As shown, the required basic data is as follows figure 2 As shown, it specifically includes the following steps:

[0109] (1) Construct a comprehensive evaluation method of soil environmental quality based on the contingency table method. The comprehensive evaluation method effectively combines the single factor index method and the Nemerow index method to form a new evaluation rule to evaluate the soil heavy metal monitoring points. Environmental quality level; at the same time, the evaluation results of heavy metal monitoring points for agricultural products are introduced to provide a data basis for the subsequent division of cultivated land soil environmental quality categories;

[0110] The soil heavy metal evaluation indicators of the monitoring points include cadmium, mercury, arsenic, lead and chromium, accord...

Embodiment 2

[0116] This embodiment provides a method for classifying the soil environmental quality of arable land. The method refers to the method in Example 1, wherein, according to the calculation results, the environmental quality grades of the soil and agricultural products are inconsistent, and the soil environmental quality grade is I Level, the environmental quality level of agricultural products is level II, and the environmental quality category of regional cultivated land soil is the priority protection category.

Embodiment 3

[0118] This embodiment provides a method for classifying the soil environmental quality of arable land. The method refers to the method in Example 1, wherein, according to the calculation results, the environmental quality grades of the soil and agricultural products are inconsistent, and the soil environmental quality grade is I Level, the environmental quality level of agricultural products is level III, there is super-enrichment phenomenon in agricultural products, and the environmental quality category of regional cultivated land soil is the priority protection category.

technical field

[0001] The invention belongs to the technical field of soil quality evaluation, and relates to a method for classifying cultivated land soil environment quality. Background technique

[0002] With the acceleration of urbanization and industrialization, the problem of soil pollution has gradually become more prominent. Therefore, it is necessary to restore and manage the soil to ensure the quality and safety of the corresponding agricultural products. Therefore, the evaluation and classification of soil quality play an important role in soil restoration and cultivated land management.

[0003] In terms of soil evaluation methods, currently commonly used soil heavy metal pollution evaluation methods mainly include index methods, such as single pollution index, Nemerow comprehensive index method, enrichment factor method, etc., and there are also model methods, such as fuzzy number method and gray clustering method , Analytical Hierarchy Process, etc. However, ...

Examples

Embodiment 1

[0108] This embodiment provides a method for classifying cultivated land soil environmental quality, the technical roadmap of the method is as follows figure 1 As shown, the required basic data is as follows figure 2 As shown, it specifically includes the following steps:

[0109] (1) Construct a comprehensive evaluation method of soil environmental quality based on the contingency table method. The comprehensive evaluation method effectively combines the single factor index method and the Nemerow index method to form a new evaluation rule to evaluate the soil heavy metal monitoring points. Environmental quality level; at the same time, the evaluation results of heavy metal monitoring points for agricultural products are introduced to provide a data basis for the subsequent division of cultivated land soil environmental quality categories;

[0110] The soil heavy metal evaluation indicators of the monitoring points include cadmium, mercury, arsenic, lead and chromium, accord...

Embodiment 2

[0116] This embodiment provides a method for classifying the soil environmental quality of arable land. The method refers to the method in Example 1, wherein, according to the calculation results, the environmental quality grades of the soil and agricultural products are inconsistent, and the soil environmental quality grade is I Level, the environmental quality level of agricultural products is level II, and the environmental quality category of regional cultivated land soil is the priority protection category.

Embodiment 3

[0118] This embodiment provides a method for classifying the soil environmental quality of arable land. The method refers to the method in Example 1, wherein, according to the calculation results, the environmental quality grades of the soil and agricultural products are inconsistent, and the soil environmental quality grade is I Level, the environmental quality level of agricultural products is level III, there is super-enrichment phenomenon in agricultural products, and the environmental quality category of regional cultivated land soil is the priority protection category.

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