色季拉山土壤养分空间分布特征分析

Study on Spatial Distribution of Soil Nutrients in Sejila Mountain

为了解森林土壤养分的空间特性,以西藏色季拉山为主要研究对象,根据野外调查采样和室内样品测定分析为基础,结合GIS空间插值方法分析森林土壤养分空间分布状况。结果表明,色季拉山属酸性土壤,其土壤有机质和全氮含量高于全国平均值,土壤有机质和速效磷随海拔增加而升高,速效钾与之相反,全氮含量在山体中部较高;山体东、西坡土壤养分指标差异显著,随海拔上升均有一定的变异规律。

In order to analyze the spatial characteristics of forest soil nutrients in Sejila mountain, based on field investigation and laboratory sample measurement,spatial distribution of forest soil nutrients was analyzed with GIS spatial interpolation methods.The results showed that, the soil of Sejila mountain was acidic,the organic matter and total nitrogen content of soil were higher than the national average,soil organic matter and available phosphorus content rised with increasing altitude,available potassium decreases with increasing altitude,total nitrogen content was higher in the middle of the mountain.The soil nutrient indicators in east and west slope were significantly different,and there were some variation regularities as altitude rised.