基于GIS的舒城县土壤养分综合评价

土壤养分评价是进行土壤改良区划的基础性工作。以安徽舒城县为例,以0-20mm土壤层的有机质、速效钾、速效磷、PH值等土壤养分含量为数据基础,利用ArcGIS 9.0的Kriging插值和栅格叠加功能,结合地统计学方法,绘制出了舒城县土壤养分等级图。结果表明,舒城县土壤养分质量总体水平不高,其中1、2、3、4等土壤面积分别占13.44%、18.78%、19.64%、48.13%。采用该方法进行土壤养分质量评价能较客观地反映土壤养分状况,为GIS研究成果实际运用提供了思路。

The Integrated Evaluation about Soil Nutrients in Shucheng County Based on GIS

The integrated evaluation about soil nutrients is the basic work for soil improvement.In Shucheng county,Anhui province.with 0~20mm layer of soil organic matter,,total N,available P,available K and pH value,such as soil nutrient content of the data base,the use of ArcGIS 9.0 and the Kriging interpolation grid overlay function,with statistics Methods,drawing a map Shucheng County soil nutrient level.Soil available nutrient was classified into four grades.The results show that the first classification is 13.44%,the second classification is 18.78%,the third classification is 19.64%,the fourth classification is 48.13%.The method used to carry out evaluation of the quality of soil nutrients can more objectively reflect the situation of soil nutrients,and GIS for the practical application of research results to provide some methods.