基于GIS的毕节烟地土壤厚度空间插值方法比较研究  

Comparative Study of Spatial Interpolation Method of Tobacco-land Soil Thickness in Bijie Based on GIS

作　　者：符德龙 吴雪梅[2] 陶佩杰 张富贵[2] 曹廷茂 FU Delong;WU Xuemei;TAO Peijie;ZHANG Fugui;CAO Tingmao(Bijie Branch of Guizhou Provincial Tobacco Corporation,Bijie 551700,China;College of Mechanical Engineering,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州省烟草公司毕节市公司,贵州毕节551700 [2]贵州大学机械工程学院,贵州贵阳550025

出　　处：《贵州大学学报（自然科学版）》2018年第6期48-52,共5页Journal of Guizhou University:Natural Sciences

基　　金：中国烟草总公司贵州省公司科技项目(中烟黔科[2016]6号-201613);贵州省烟草公司毕节市公司科技项目(201652050024140);贵州省科技计划项目(黔科合支撑[2017]2595)

摘　　要：基于地理信息系统软件ArcMap的统计分析模块,分别采用反距离权重法、样条函数法和普通克里格法,对毕节市492个烟地样本点进行空间插值,并利用交叉验证方法对插值精度进行评估。结果表明:普通克里格法对耕深、犁底层、可耕层均具有最好的插值精度。对于耕深和可耕层,样条函数法的插值精度优于反距离权重法;而对于犁底层,反距离权重法的插值精度优于样条函数法。普通克里格法插值结果表明:赫章县、威宁县烟地各项土壤厚度均较大;七星关区、大方县、黔西县和大方县交界处各项土壤厚度均较小。Based on the statistical analysis module of geographic information system-ArcMap,respectively,492samples of tobacco fields in Bijie were interpolated by inverse distance weight,spline function and ordinary Kriging,and the interpolation accuracy was evaluated by using cross validation method.The results show that the ordinary Kriging has the best interpolation accuracy for tillage depth,plough pan and cultivable soil layer.For tillage depth and cultivable soil layer,the interpolation accuracy of spline function is better than that of inverse distance weight;for plough pan,the interpolation accuracy of inverse distance weight is better than that of spline function.The results of ordinary kriging interpolation show that,The indexes of tobacco-land soil thickness of Hezhang county and Weining county are deeper.The soil thickness of Qixingguan county,Dafang county,Dafang county and Qianxi county junction are shallower.

关 键 词：土壤厚度 空间插值 交叉验证 克里格插值法 

分 类 号：S159[农业科学—土壤学]