基于GIS的葫芦河流域土壤化学组成与地形的关系

Analysis of Relationship between Chemical Composition of Soil and Topographical Parameter Based on GIS in Hulu Revier Area

[目的]为葫芦河流域土壤的科学管理、合理施肥提供参考。[方法]以葫芦河流域的土壤分布图、土壤化学组成的各种指标值和DEM为主要数据源,分典型剖面和统计剖面,采用相关分析的方法分析葫芦河流域地形对土壤化学组成的影响。[结果]在研究区内,地形影响降水和气温再分配,导致土壤化学组成各个指标值的差异。同时,找出对土壤化学组成影响最显著的地形参数。[结论]这对于合理施肥具有指导作用,便于制定土壤改良方案。

[ Objective] The research aimed to provide the reference for scientific management and adequate fertilization in Hulu River Area. [ Method ] By taking the distribution map of soil, the＂chemical composition of soil and DEM as the data source, the effect of terrain to soil was studied through carrying out correlation analysis between the chemical composition of soil and the topographical parameter. [ Result] The ter- rain led to the discrepancy in the chemical composition of soil by affecting the redistribution of precipitation and temperature. And the most re- markable topographical parameter that was influential in the chemical composition of soil was found out. [ Conclusion] The research had guid- ance functions for rational applving fertilizer and held to make the scheme for imnroving the soil.