山地丘陵耕地土壤养分最优插值方法的研究——以江西省渝水区水北镇为例.pdfVIP

DOI :10.15933/ki .1004 -3268.2011.02.010 　河南农业科学, 2011, 40 (2):76-80 　Journal of H nan Agricultural Sci nc s ——— 1 1 1 1 3 2 ＊ 郭　熙, 黄　俊, 谢　文, 陶丹丹, 鲁　敏 , 赵小敏 (1. , 330045;2., 330029; 3., 330002) :以江西省渝水区水北镇为研究区, 利用823 个采样点的耕地土壤养分数据, 分析区内耕地土 壤养分含量 海拔、坡度的相关性, 采用协同克里格插值方法, 结合海拔、坡度进行插值, 并把经交 叉检验后的结果 逆距离权重法、普通克里格法的结果进行比较。结果表明, 结合海拔、坡度进行 插值后, 精度有明显提高。插值精度排序为协同克里格法普通克里格法逆距离权重法, 在3 种 插值方法中, 协同克里格法为最优插值法。 :土壤养分;空间插值;逆距离权重法;普通克里格法;协同克里格法 :S157 　　:A 　　:1004-3268(2011)02-0076-05 T h B st Int rpolation to Evaluat Soil Nutri nt in th Mountainous Farmland ———A Cas Study of Shuib i Tow n, Yushui Country, Jiangxi Provinc 1 1 1 1 3 2 G UO Xi , HUANG Jun , XIE W n , TAO Dan-dan , LU Min , ZHAO Xiao-min ﹡ (1.R s arch Institut of Land Sci nc , Jiangxi Agricultural Univ rsity, Nanchang 330045, China; 2.Nanchang T ach rs Coll g , Nanchang 330029, China;3.Jiangxi Land D v lopm nt R organization C nt r, Nanchang 330002, China) Abstract:Th r lationship b tw n soil nutri nt cont nt and l vation and slop w as valuat d bas d on th farmland soil nutri nt data of 823 sampling sit s in Shuib i tow n, Yushui country, Jiangxi provinc .Th m thod of co-Kriging w as us d w ith l vation and slop consid r d, and th r sult of cross-x amination w r compar d w ith that by inv rs distanc w ight (IDW )and ordinary Kriging.R sults r v al d that th accuracy of int rpolation w as obviously improv d w h n l vation and slop w r combin d.A mong th thr int rpolation m thods, co-Kriging w as th b st on and follow d by ordinary K riging . Key words:Soil nutri nt;Int rpolation m thod;Inv rs distanc w ight