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Soil texture particle content predicting method

A technology of particle content and prediction method, applied in the field of soil prediction, can solve the problem of low precision of soil map production of soil survey sample points

Active Publication Date: 2016-08-24
INST OF SOIL SCI CHINESE ACAD OF SCI
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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide an extrapolation soil mapping method based on a local soil-landscape model, which can solve the problems of sparse soil survey sample points in existing remote areas and low accuracy of soil map production in some areas. method of prediction

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Embodiment Construction

[0063] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0064] The basic idea of ​​the present invention is to select a local extrapolation area (hereinafter referred to as a local area) for the phenomenon that the sampling density of the local area is relatively high during the digital soil mapping process. Taking the local area as the research target, predict the spatial distribution of soil texture information, and select representative prediction results as the input data for global soil texture (including clay, silt, and sand content) prediction. Furthermore, different levels of global prediction point sets and verification point sets are constructed to try to predict global soil texture information and evaluate the availability of extrapolation techniques, and ultimately improve the production accuracy of digital soil maps.

[0065] Taking the prediction of soil clay co...

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Abstract

The invention relates to a soil texture particle content predicting method, and provides a complete soil property predicting technical scheme based on extrapolation technology. The optimal prediction data set is selected through the combination of the local soil-landscape model extrapolation technology and the cross validation mechanism, the universal digital soil cartography technical scheme that an extrapolation frame is universal for different research sample regions, the optimal extrapolation area is determined according to different data properties and uncertainty is analyzed by evaluating a local model is achieved through the extrapolation soil expert knowledge and quantitative evaluation prediction precision technology, and the method has wide industrial application prospects.

Description

technical field [0001] The invention relates to a method for predicting soil texture particle content, and belongs to the technical field of soil prediction. Background technique [0002] Soil texture is one of the most important physical properties of soil science. Soil texture refers to the composition and content of soil coarse and fine particles. The spatial prediction of soil texture is very important for soil moisture simulation and soil pollution remediation applications, and it is one of the most important input parameters for models such as atmospheric models, hydrological models, and land surface process models. In terms of soil texture classification, European and American countries have different classification standards. Soil particle classification adopts three categories: clay, silt and sand. Taking the international system as an example, when the soil particle size is less than 0.002 mm, it is defined as clay, when it is between 0.002 and 0.02 mm, it is def...

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Application Information

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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 宋效东刘峰张甘霖李德成吴华勇杨金玲赵玉国
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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