Influence Factors and Effects of Different Interpolation Methods for Soil Properties Mapping Based on Spatial Difference Degree -A Case Study of Xinxiang County
ZHANG Lu-wei
ZHAO Yan-feng
CHEGN Dao-quan
XU Jia
Abstract：Kriging ,inverse distance weight method(IDW) and polygon value represented by point value method(PRP) were used for mapping of available phosphorus and slow-release potassium , and the influence factors and effects of these interpolation methods for soil properties mapping based on spatial difference degree were analyzed with 1 347 sample data from 2 694 soil samples collected from Xinxiang county of Henan province in 2008 .The results showed that the effect of mapping was the best using Kriging method ,IDW method was worse ,and PRP method was the worst ;the effects of mapping with these interpolation methods were influenced by the space dis-tribution of samples ,more samples were included in the region with lower spatial difference de-gree ,and the other region included fewer samples ;due to the impact of soil properties themselves spatial variability on mapping ,for the soil properties with spatially random variation sampling density should be increased in severe variation region to ensure the mapping results accuracy .
Keywords：spatial difference degreeinterpolation methodssoil properties mappinginfluence factors
Publication Date：2013-11-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 76-80 )