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河南省安阳县三种土壤全氮含量空间插值方法的比较分析
引用本文:赵巧丽,郑国清,冯晓,李国强.河南省安阳县三种土壤全氮含量空间插值方法的比较分析[J].土壤通报,2012(5):1162-1166.
作者姓名:赵巧丽  郑国清  冯晓  李国强
作者单位:河南省农业科学院农业经济与信息研究中心
基金项目:基于3S技术的冬小麦氮肥管理信息系统(029102110042)资助
摘    要:采用反距离加权法(IDW),克里格法(Kriging),径向基函数法(Spline)对河南省安阳县385个土壤样点的全氮进行空间插值,通过交叉验证和样点检验对不同空间插值方法进行分析,结果表明,Spline优于IDW和Kriging,并且不同插值方法有不同的最优插值点数;基于不同样条函数的径向基函数法插值结果的平均相对误差MRE不同,其中平面样条函数表现最差,高次曲面函数,张力样条函数、规则样条函数和反高次曲面函数之间差异不显著。检验分析结果也显示,Spline优于IDW和Kriging,因此,相对于IDW和Kriging,Spline更适合用于全氮的空间插值。

关 键 词:土壤全氮  空间插值  反距离加权法  克里格法  径向基函数法

Comparison of Spatial Interpolation For Soil Total Nitrogen in Anyang Country of Henan Province
ZHAO Qiao-li,ZHENG Guo-qing,FENG Xiao,LI Guo-qiang.Comparison of Spatial Interpolation For Soil Total Nitrogen in Anyang Country of Henan Province[J].Chinese Journal of Soil Science,2012(5):1162-1166.
Authors:ZHAO Qiao-li  ZHENG Guo-qing  FENG Xiao  LI Guo-qiang
Institution:(Research Center of Agricultural Economy and Information,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China)
Abstract:soil nitrogen value of 386 samples in anyang country of Henan Province was interpolated in space through three methods,the distance of the weighted method(IDW),ordinary Kriging(Kriging),radical basic functions(Spline).The precisions of different interpolation methods were analyzed by cross validation and validation.The verification result showed Spline was better than IDW and Kriging,and the different methods had the different and optimal points interpolated.Radical basic functions based on different Spline methods had the different MRE of interpolation results.,thin-plate Spline was worst,and there was no obvious difference among multiquadric,Spline with tension,completely regularizedSspline and inverse multiquadric functions.The validation analysis showed that MRE of Spline was better than IDW and Kriging.So Spline was fitter for spatial interpolation for soil nitrogen than IDW and Kriging.
Keywords:Soil total nitrogen  Spatial interpolation  IDW  Kriging  Radical basic functions
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