长期定位施肥对棕壤重金属的影响及其环境质量评价  

Effects of Long Term Fertilization on the Heavy Metals in Brown Soil and Environmental Quality Evaluation

作　　者：王颖[1] 韩晓日[1] 孙杉杉[1] 王帅[1] 赵立勇[1] 

机构地区：[1]沈阳农业大学土地与环境学院,辽宁省农业资源与环境重点实验室,沈阳110161

出　　处：《沈阳农业大学学报》2008年第4期442-446,共5页Journal of Shenyang Agricultural University

基　　金：国家自然科学基金项目(30671231);国家粮食丰产科技工程项目(2006BAD02A12)

摘　　要：对沈阳农业大学后山棕壤肥料长期定位试验地,经过28年不同施肥处理土壤的8种重金属元素(Cd、Cr、Cu、Ni、Pb、Zn、Hg、As)含量进行测定,并以该区土壤环境质量背景值和GB15618-1995土壤环境质量标准二级标准为标准,利用单项污染指数法和尼梅罗综合污染指数法进行评价。结果表明:以背景值为准,各小区的8种重金属的含量均有上升趋势,综合评价结果为P综合=29.64,受Pb的影响总体累积程度很高;按照二级标准,Cd是8种重金属中唯一超标的元素,P值在2.25～2.64之间,其他元素P值范围是0.01～0.61,均未超标。从全区总体来看,综合评价结果为P综合=1.72,达到中度污染,应引起重视。The object of this study was to determinate contents of the eight heavy metals （Cd, Cr, Cu, Ni, Pb, Zn, Hg, As） in 12 soil fertilization treatments in Shenyang Agricultural University brown soil long-term experiments. Evaluate was made depending on the local soil environmental quality background values and the GB15618-1995 secondary soil environmental quality standards. The soil environmental quality evaluation was made with individual polluting factor index method and MEANS integrated polluting index method. The results indicated that depending on the background values, the contents of eight heavy metals in every group increased. The integrated pollution index was P=29.64. Affected by high lead level, the enrichment had high value. Depending on secondary standards, cadmium was the only overweight element of the eight metals, with P values between 2.25 to 2.64. The P values of the other elements were between 0.01 to 0.61. For the overall area, the integrated pollution index was P=1.72, medium pollution level.

关 键 词：长期定位试验 棕壤 不同施肥处理 土壤环境质量 重金属 

分 类 号：X53[环境科学与工程—环境工程]