农学学报2025，Vol.15Issue(11)：41-48,8.
基于GIS的民和县耕地土壤养分空间插值方法比较研究
Comparative Study on Spatial Interpolation Methods of Cultivated Soil Nutrients in Minhe County Based on GIS
摘要
Abstract
This study investigated the spatial variability of soil nutrients and evaluated various spatial interpolation methods in Minhe County,Qinghai Province.This study employed GIS spatial analysis and geostatistical methods to analyze the spatial variability of soil organic matter(SOM),total nitrogen(TN),available phosphorus(AP)and available potassium(AK).The research aimed to determine the most suitable spatial interpolation method for each nutrient.The results showed that moderate spatial variability for all nutrients,with AK exhibiting the highest variation at 55.5%,while other nutrients ranged from 34.5%to 54.8%.Spatial distribution patterns revealed higher concentrations of soil organic matter and TN in the northwest decreasing towards the southwest.AP displayed a more uniform distribution,whereas AK was highest in the central region,gradually declining northward.Interpolation accuracy assessments indicated that the common Kriging method was optimal for SOM,AP,and AK,while the radial basis function method proved most accurate for TN.These findings provided valuable insights into the spatial distribution of soil nutrients in Minhe County and offer guidance for selecting appropriate interpolation methods in similar regions.关键词
GIS空间分析/土壤养分/空间插值/半方差函数/地统计学/交叉验证/插值方法Key words
GIS spatial analysis/soil nutrients/spatial interpolation/semi-variance function/geostatistics/cross verification/interpolation method分类
农业科技引用本文复制引用
李友维,张骏达,蔡立群..基于GIS的民和县耕地土壤养分空间插值方法比较研究[J].农学学报,2025,15(11):41-48,8.基金项目
国家重点研发计划项目"黄土高原旱作适水改土与产能提升技术模式及应用"(2021YFD190070400). （2021YFD190070400）
