基于GIS杭嘉湖平原土壤氟的质量评价

Quality Evaluation of Soil Fluorine on Hangjiahu Plain Based on GIS

测定分析了浙江省杭嘉湖平原13个县市的土壤氟含量，以GIS软件平台为基础，利用克里格插值法揭示了该地区土壤全氟及其影响因素的空间分布特征，按照土壤全氟指数法评价杭嘉湖平原土壤氟的健康质量．结果表明：全氟含量的空间分布是中、东部比西部的高，与土壤母质、pH值、有机质、阳离子交换量、土壤质地等关系密切；整个研究区域土壤全氟含量较低，大多在200～300mg／kg之间，有23．7％的土壤全氟含量低于200mg／kg；其中又以余杭的土壤全氟含量最低，均在100mg／kg以下．

Contents of fluorine in the plough layer（0-20cm）of paddy soils from Hang, jiahu Plain were investigated to evaluate quality of fluorine using total fluorine index method. Kriging method was applied to study the spatial variability of soll total fluorine in relation to their influential factors and their distribution maps were obtained based on GIS. The results showed that the range of total fluorine （TF） contents in the mils from central and eastern parts of Hang, jiahu Plain was higher than that from the western part. The concentrations of TF in soil had a close relationship with parent material, pH value, organic matter, cation exchange capacity content and soil texture. The main range of TF was 200-300mg/kg, while TF contents accounting for 23.7 % of the area were less than 200mg/kg in the studied area. In which TF contents in soil in Yuhang County were the lowest, less than 100mg/kg.