摘要
介绍了重庆市近郊的蔬菜含汞量随其距发电厂越近而浓度越高的趋势，蔬菜所生长的土壤及其附近的地下水含汞量，亦与蔬菜有类似的情况。但不同作物吸收汞的能力各异，不同来源的汞在作物体内的分布也不相同，来自大气的汞，大都集中于地上部，来自土壤则大都聚积于根。土壤粘粒类型的差异，也对作物吸汞能力及汞在株体内的分布有明显的影响。土壤肥力不单影响植物吸收土壤汞，而且制约作物吸收大气汞。
Mercury content in vegetables in the suburb of Chongqing decreased with the distance from the power plant.Mercury content in soil from which the mentioned vegetables grew and in underground water were similar to that in vegetables.Mercury absorbed by and distributed in crops were different from their Hg sources.Hg always concentrated at the top of crops such as leaves and stems when Hg was from air,while the underground part of plant (root) was highest in Hg when it was from soil.The Hg absorbed by and distribu ted in crops were also affected by the kinds of clay mineral in soil significantly.The soil fertility affected on the Hg absorbed by plant not only from soil but also from air.
出处
《重庆环境科学》
1997年第1期5-10,共6页
Chongqing Environmental Science
关键词
作物
汞含量
影响因素
酸雨
蔬菜
Crops,Soil,Mercury content,Influencing factors
