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, ...

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Problems solved by technology

CN 107220782A discloses a soil environmental quality grading and discrimination method for grading and safe utilization of reclaimed land. The method proposes to set two-level soil safety thresholds based on agricultural product hygiene safety: threshold I and threshold II; according to the pollution risk corresponding to the two-level thresholds level, which stipulates three types of safe utilization methods: priority cultivation area, restricted cultivation area, and ecological control area; through pot experiments, the quantitative relationship between the pollutant content of crops and the concentration of soil pollutants is established to determine the final threshold II of pollutants in the soil value; this method does not clarify how to use points and surfaces to carry out metal content implantation, and the relationship between crops and soil pollutants established through pot experiments has a narrow scope of application, and the applicable situation is single, and it is difficult to apply to a variety of agricultural products

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