陕西师范大学学报（自然科学版）2013，Vol.41Issue(4)：85-89,5.
县域土壤养分协同克里格和普通克里格空间插值预测比较——以陕西省蓝田县为例
Spatial prediction comparison of soil nutrient between ordinary Kriging and Cokring at county scale——A case study in Lantian county of Shaanxi province
摘要
Abstract
Geostatistics combined with GIS were applied to analyze the spatial interpolation accuracy of soil nutrients such as organic matter,alkali-hydrolyzable nitrogen,available phosphate and available potassium in Lantian county.The accuracy of prediction obtained by Ordinary Kriging and Cokriging were compared by using cross-validation parameters and relative tolerance,and the result showed that there was a medium level of spatial variability in soil nutrients,and in the condition of significant correlation in soil nutrients,using Cokriging can narrow the range of errors,and reduce the root-mean-square prediction error (RMSE),and improve the accuracy level between actual value and predicted value.The conclusion is that Cokriging can improve the accuracy of prediction value of soil nutrients in medium scale region.关键词
地理信息系统/地统计学/协同克里格/普通克里格/交叉检验Key words
GIS/ geostatistics/ Cokriging/ ordinary Kriging/ cross-validation分类
农业科技引用本文复制引用
杜挺,杨联安,张泉,王安乐..县域土壤养分协同克里格和普通克里格空间插值预测比较——以陕西省蓝田县为例[J].陕西师范大学学报（自然科学版）,2013,41(4):85-89,5.基金项目
教育部人文社会科学研究规划项目(10YJA910010) （10YJA910010）
陕西省农业科技攻关项目(2011K02-11). （2011K02-11）
