摘要
通过对郑州市郊区的3个蔬菜基地土壤中重金属的调查和采样分析,依据国家土壤环境质量二级标准评价其单项和综合污染指数.结果表明:3个菜区土壤综合污染指数都超过了1.0,等级都超过了警戒线,污染程度为:惠济桥菜区>青寨菜区>铁炉菜区;3个菜区Cd的单项污染指数最高,Cd污染相对最为严重.相关性及主成分分析表明,连年污水灌溉及大量的施肥是导致3个菜区土壤中Cu、Zn、Ni、Cd、Pb和Cr积累的重要原因之一.
Based on investigation and laboratory test,the content of the heavy metals from the vegetable bases soil in Zhengzhou suburb were analyzed.The single and comprehensive pollution indexes were evaluated according to the national standard for evaluation of soil environmental quality.The results showed that the comprehensive pollution indexes of three vegetable areas were all higher than 1.0,the pollution degree was Huijiqiao〉Qingzhai〉Tielu,the single pollution indexe of Cd was the highest in all of the three areas,this showed that the Cd pollution was most serious.The correlation analysis and the principal component plot analysis demonstrated that sewage irrigation and high fertilization were the major course for the accumulation of Cu,Zn,Ni,Cd,Pb and Cr.
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2009年第2期126-131,共6页
Journal of Gansu Agricultural University
基金
国家科技支撑计划项目(2007BAD87B09)
关键词
蔬菜基地
土壤
重金属
含量
评价
vegetable bases,soil,heavy metal,content,evaluation
