黑河市张地营子乡土壤重金属污染综合评价

Comprehensive Assessment of Heavy Metals Pollution in the Soil of Zhangdiyingzi

[目的]测定黑河市张地营子乡土壤重金属含量,并对重金属污染状况进行综合评价。[方法]研究了黑河市张地营子乡不同土地利用背景和相同土地利用背景下的3个功能区的6种重金属元素(Hg、As、Cd、Cr、Cu、Pb)的含量,对重金属含量与不同土地利用及采样深度的关系进行初步研究,并对重金属污染状况进行了总体评价。[结果]重金属在土壤中已有一定程度的累积,在地表的累积程度比较高,Hg的污染最为严重,已达到了警戒水平。但总体来说,黑河市张地营子乡所研究区域土壤处于清洁水平,满足绿色食品和蔬菜生产的要求。[结论]该研究可为对黑龙江省黑河市张地营子乡土壤重金属污染的认识积累科学依据,并为扩大无公害粮食、蔬菜的种植面积和促进当地农业发展奠定基础。

[Objective] The aim is to detect the heavy metals in the soil of Zhangdiyingzi and comprehensively assess its heavy metals pollution.[Method] The content of Hg、As、Cd、Cr、Cu and Pb in three functional zones under different and same land use background is studied,the relationship between heavy metals and different land use as well as sampling depth is analyzed.The overall heavy metals pollution status is evaluated.[Result] The soil has been contaminated by heavy metals,especially in the surface soil zones.The content of Hg is high and should be paid more attention.But the soil is at clean level on the whole,which could meet the needs of producing green food and vegetables.[Conclusion] The study accumulates scientific bases for us to understand the heavy metals pollution in the soil of this area,and lays the foundation for enlarging the planting areas of non-pollution grains and vegetables as well as promoting local agriculture.