In order to evaluate the geochemical characteristics of soil nutrients and soil fertility in Nanhua County,Central Yunnan Province,surface and deep soil samples were systematically collected.11 soil nutrient indicators such as B,SOM,Cu,K2O,Mn,Mo,N,P,TFe2O3,Zn,and pH were selected.Combined with the geological background,the geochemical characteristics of the main soil nutrient indicators in the area were studied,using the fuzzy evaluation method through the affiliation function model and factor analysis.The results show that,influenced by geological background,the average pH value of surface soil in the area is 5.33,which is generally acidic.Indicators of nitrogen nutrients and trace elements such as copper and zinc are rich,and indicators of phosphorus,potassium and organic matter are relatively deficient.The comprehensive soil fertility status is generally good,and most of it reaches the level of fertile and more fertile.Compared with the results of the second national soil survey,the average value of pH in surface soil of Nanhua County is lower and acidify.The contents of organic matter and nitrogen hold steady.
关键词
土壤/养分特征/综合肥力/模糊评价法/南华县
Key words
Soil/nutrient characteristics/comprehensive fertility analysis/fuzzy evaluation method/Nanhua County
维普
万方数据