期刊论文

Effect of geomorphologic landscape and sampling numbers on the interpolation precision of cultivated land topsoil organic matter

中文

土壤通报

0564-3945

2015

46

6

1289-1298

10.19336/j.cnki.trtb.2015.06.003

国家科技支撑计划项目(2012BAD14B17) 湖南省耕地地力评价研究项目资助

本校为第一机构

将湖南省划分为洞庭湖平原区,湘东、湘中丘陵、中低山区,湘南丘陵、中低山区和湘西北中低山区四个地貌景观区,以高密度的耕地表层土壤有机质数据为基础,分析地貌和样点数对插值精度的影响。研究表明:湖南省耕地表层土壤有机质平均含量从高到低依次为:湘南丘陵、中低山区> 湘东、湘中丘陵、中低山区> 湘西北中低山区> 洞庭湖平原区。湖南省耕地表层土壤有机质变异系数在31.23% ~ 37.55%之间,属于中等变异水平;基底效应在12.3% ~ 50.0%之间,其中湘东、湘中丘陵、中低山区和湘南丘陵、中低山区耕地表层土壤有机质呈现强烈的空间自相关,洞庭湖平原区和湘西北中低山区具有中等空间自相关。相同采样密...

The territory of Hunan Pro vince was divided into four areas to analyze the effects of geomorphologic landscape and sampling number on the Kriging interpolation precision of cultivated land topsoil organic matter which is Dongting Lake Plain, the hilly and middle-low mountainous area of eastern and middle Hunan, the hilly and middle-low mountainous area of southern Hunan and the middle-low mountainous area of northwestern Hunan. The results show that: the average of cultivated land topsoil organic matter in Hunan Province went down as follow: the hilly and middle-low mountainous area of southe...