不同土地利用方式对贵州岩溶土壤微量重金属元素含量的影响

利用地统计学的方法,对贵州水城岩溶盆地复合土地利用方式下土壤微量重金属元素含量的时空变异进行了研究。结果表明:贵州水城盆地岩溶土壤微量重金属元素含量的变化与不同的土地利用方式时空上的变异有很好的一致性。盆地中工业区往往成为土壤微量重金属元素迁移富集的高值中心,而受人类活动影响较小的自然林区则基本保持了原始状况成为低值中心。因此合理进行土地利用对保护土壤和岩溶地下水免受污染具有重要的意义。

Effects of Land Use Changes on Trace Elements of Karst Soil in Shuicheng Basin

One of the hot issues of human and environment interaction presently is the effection of different landuse types on soil.However,more attention was paid to the changes of soil nutrients and physical structures under single landuse type.Here the temporal and spatial variation of soil trace elements were reported with geostatistics method in Shuicheng Basin,which had a mixed landuse types.The results obtained from showed that it was a well agreement between the temporal and spatial variation of Karst soil trace elements and the change of landuse types.Generally,the industrial area displayed high trace elements value while the low value in the natural forest area.So the rational landuse could be crucial to protect the soil and Karst groundwater.