Plain area soil organic carbon three-dimensional space distribution simulation method

Abstract

The invention provides a plain area soil organic carbon three-dimensional space distribution simulation method. The method comprises the steps of (1) fitting a soil organic carbon profile change optimal depth function and determining function parameters; (2) analyzing influence factors of soil organic carbon profile depth function parameters; and (3) constructing and calculating a three-dimensional space distribution simulation model. According to the invention, environment auxiliary variables for simulating soil property spatial distribution in a smooth terrain area are constructed; a soil depth transfer function and a regression Kriging method are used to establish a soil organic carbon three-dimensional space distribution simulation model in the smooth terrain area; the three-dimensional space distribution simulation method research of the soil organic carbon in the region is carried out; a reliable simulation method can be provided for accurately mastering soil organic carbon three-dimensional space-time evolution information under the high-strength agricultural utilization background of the terrain smooth area, and a method reference can be provided for accurately estimating the organic carbon reserve of the area and guaranteeing the soil safety and the grain safety.

Description

technical field [0001] The invention belongs to the technical field of soil environment, and in particular relates to a method for simulating the three-dimensional spatial distribution of soil organic carbon in plain areas. Background technique [0002] Soil organic carbon pools are the largest carbon pools in terrestrial ecosystems. It is estimated that the global 1m deep soil organic carbon storage is about 1500Pg (1Pg=10 15 g), more than twice the atmospheric carbon pool (750Pg), and 2 to 3 times the terrestrial vegetation carbon pool. Small changes in soil organic carbon may cause large changes in atmospheric carbon dioxide concentration, thereby affecting global climate change. At the same time, soil organic carbon is also the source of plant mineral nutrition and organic nutrition. The storage and dynamic changes of organic carbon in soil not only directly affect the global carbon cycle, but also are closely related to soil fertility, agricultural production and env...

AI Technical Summary

Problems solved by technology

Only by simulating the temporal and spatial evolution of surface soil organic carbon, it is difficult to fully understand the overall situation of soil organic carbon changes under the background of high-intensity agricultural activities

At the same time, the commonly used environmental auxiliary factors such as terrain have little difference in the flat terrain area, so it is difficult to be used as auxiliary variables in the simulation and prediction of the spatial distribution of soil properties

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