摘要
调查了 1、5、8、1 1a棚龄蔬菜大棚土壤中重金属元素As、Cd、Co、Cr、Cu、Hg、Fe、Mn、Mo、Ni、Pb和Zn的含量。结果表明 :同一使用年限的蔬菜大棚 0～ 40cm土层内重金属元素含量差异很小 ;与棚外土壤相比 ,除 1a棚龄的土壤外 ,多数土壤重金属含量随大棚使用年限的延长而有所增加 ;研究地区的蔬菜大棚土壤尚未发生重金属污染超标现象 ;大量施肥 (复合肥 )
Contents of heavy metal elements of As,Cd,Co,Cr,Cu,Hg,Fe,Mn,Mo,Ni,Pb and Zn in soils of vegetable greenhouses 1,5,8 and 11 years old and a plot of conventional cultivated dryland(CK)have been investigated.The results showed that the content distributions of heavy metal elements within the soil layer(0-40 cm in depth)of the greenhouses of same age varied slightly;different heavy metal elements showed different tendencies in variation;generally,the contents of heavy metal elements in the soils of the greenhouses utilized for 5,8 and 11 years were higher,but not yet up to the extent of being called pollution;High rate of fertilization(compound fertilizers)is considered as the main reason for the increases in contents of heavy metal elements in the soils of these greenhouses.
出处
《农村生态环境》
CSSCI
CSCD
北大核心
2003年第3期38-41,共4页
Rural Eco-Environment
基金
中国科学院知识创新工程重要方向项目 (KZCX3-SW -417)
关键词
蔬菜大棚
土壤
重金属
使用年限
施肥
vegetable greenhouse
soil
heavy metal
age of utilization
fertilization
