水土保持研究2017，Vol.24Issue(6)：97-104,8.
锡林河流域土壤有机碳空间变异分析
Spatial Variability of Soil Organic Carbon in Xilin River Basin
摘要
Abstract
In order to explore the spatial variability of soil organic carbon in the Xilin River Basin,the variation characteristics and distribution pattern of 0-10 cm,20-30 cm,40-50 cm soil organic carbon were studied based on semivariance function theory and ordinary Kriging interpolation.The results showed that:(1) the best fitting models of soil organic carbon in 0 10 cm,20-30 cm and 40-50 cm layers were Gaussian model,Gaussian model and Exponential model;(2) with the increase of soil depth,the spatial distribution of soil organic carbon increased,the spatial distribution of soil organic carbon in 0 10 cm layer was moderate,and the spatial distribution of soil organic carbon in 20-30 cm and 40-50 cm layers had a strong spatial distribution correlation and autocorrelation distances were 25.81 km,20.26 km and 45.00 km,respectively;(3) anisotropy analysis showed that the variation degree of soil organic carbon in all directions was weakened with the increase of soil depth,and the half-variance of the same layer changed significantly in different directions,and the anisotropy was significant,the 45 ° direction from southwest to northeast and the southeast,the variance of the 45° direction showed the similarity;(4) the distribution of soil organic carbon in each layer was consistent;the soil organic carbon contents were higher in the southern part of the basin,in the north and north of the basin,and the middle and the south of the upper part of the basin.Soil organic carbon contents in the west and southwest was at the relatively moderate status,and topographic and vegetation distribution characteristics determine the distribution characteristics of soil organic carbon.关键词
土壤有机碳/空间变异/地统计学/各向异性Key words
soil organic carbon/spatial variability/geostatistics/anisotropy分类
农业科技引用本文复制引用
席小康,朱仲元,郝祥云..锡林河流域土壤有机碳空间变异分析[J].水土保持研究,2017,24(6):97-104,8.基金项目
国家自然科学基金“基于冰雪水转换过程与—植被—土壤水热互馈机制的牧草生物量模型构建”(51669018) （51669018）
