摘要
采用田间调查与室内分析相结合的方法,研究了河北省栾城县洨河两岸污灌区土壤-小麦系统中重金属Pb、Cd、Cr、Cu和Zn的分布与迁移转化特征。结果表明:污灌区土壤和小麦籽粒重金属Pb、Cd、Cr、Cu和Zn的平均含量明显高于清灌区。随着土层深度的增加,污灌土壤重金属Pb、Cd、Cr、Cu和Zn的含量呈明显的下降趋势。而清灌土壤各重金属含量在0～60 cm土层通体变化不大。污灌区小麦籽粒中Cd和Zn的平均含量分别是清灌区的3.96倍和1.30倍。相比Pb、Cr和Cu元素,Cd和Zn更容易向小麦籽粒转移。
The distribution and transformation characteristics of Pb,Cd,Cr,Cu and Zn in soil-plant system of the sewage Irrigation area in Xiaohe River in Luancheng County,Hebei Province were investigated and analyzed.The results showed that the contents of Pb,Cd,Cr,Cu and Zn in soil and wheat grain were significantly higher in the sewage irrigation area than those in the clean water irrigation area.The contents of soil heavy metals in the sewage irrigation area declined obviously with the increasing of soil depth,while those changed little in the clean water irrigation area in 0-60 cm soil layers.The average contents of Cd and Zn in wheat grain were 3.96 times and 1.30 times than those of control,respectively.Compared with Pb,Cr and Cu,Cd and Zn were more easy to transfer to wheat grain.
出处
《河北农业科学》
2010年第7期77-79,172,共4页
Journal of Hebei Agricultural Sciences
基金
国家科技支撑计划项目(2007BAD87B04)
国家科技支撑计划项目(2006BAD25B06)
河北省自然基金项目(C2008001180)
关键词
污灌
土壤
小麦
重金属
富集规律
Sewage irrigation
Soil
Wheat
Heavy metal
Enrichment regularity
