摘要
在地理信息系统和地统计学的支持下 ,以变异函数为工具 ,初步分析了江西省兴国县土壤全氮和有机质的空间变异特征 ,并应用克立格法进行最优无偏线性插值 ,得出全氮和有机质含量的分布格局 .结果表明 :全氮的变异函数曲线的理论模型符合球状模型 ,有机质为指数模型 ;两种养分的空间自相关程度均属中等的空间自相关 ;全氮和有机质空间变异的尺度范围不同 ,分别为 5 .4 1km和 9.36km .它们的空间变异主要是由结构性因素引起的 ;全氮和有机质含量的分布格局基本一致 ,具有北部高、中部和南部低的分布特征 .图 3表 2参
The spatial variance characteristics of total nitrogen and organic matter of soil in Xinguo county of Jiangxi, China were primarily analyzed using GIS(geographic information system) and geostatistics, and the spatial distribution features were quantitatively described by semi-variogram. Based on the semi-variogram, the distribution patterns of soil total nitrogen and organic matter were computed by ordinary Kriging. The results showed that the semi-varogram of total nitrogen was best fitted by spherical model and the semi-varogram of organic matter by exponential model. The spatial heterogeneity degrees were moderately dependent, but their spatial heterogeneity ranges were different. Total nitrogen was 5.41 km, while organic matter was 9.36 km. The spatial heterogeneities were mainly produced by structural factors. Total nitrogen and organic matter contents had the same distributed patterns, which were higher in the north, but lower in the middle and south part. Fig 3, Tab 2, Ref 16
出处
《应用与环境生物学报》
CAS
CSCD
2004年第1期64-67,共4页
Chinese Journal of Applied and Environmental Biology
基金
国家重点基础研究规划项目 (No .G1 9990 1 1 81 0 )资助~~
