三峡库区土壤养分空间分布状况研究

采用地统计学及GIS技术对三峡库区土壤养分的空间变异性及空间分布状况进行研究，评价研究区土壤养分含量水平。结果表明，试验区土壤养分变异较大，但均为中等变异，其中氮的空间变异主要来自结构性因素，而有机质、磷、钾的空间变异性主要来自于随机因素的影响。另外，研究区各种土壤养分含量水平均不高，其中有机质、磷、钾非常缺乏，钾大部分区域含量中等，部分地区也比较缺乏。

Spatial Distribution of Soil Nutrients in Three Gorges Reservoir Area

The spatial variability of soil nutrients in the Three Gorges Reservoir area was studied by using geo statistics and GIS technique. The results showed that the soil nutrients' variation in the study area was larger, but the spatial variation of N was mainly from the structural factors, while the spatial variability of OM, P and K was mainly influenced by random factors. In addition, the soil nutrients' content in the study area is not high, and the N, P, OM is very low, and the content of K in most of the area is medium, and some areas are also relatively lack.