天水市武山县蔬菜大棚土壤重金属含量分析与评价  

Analysis and Evaluation of Heavy Metal Content in Vegetable Greenhouse Soil in Wushan County,Tianshui City

作　　者：张喜平[1] 吕莉莉[1] 王小军 卜虎虎 杨志奇[1] 柴小琴[1] ZHANG Xiping;LV Lili;WANG Xiaojun;BU Huhu;YANG Zhiqi;CHAI Xiaoqin(Tianshui Institute of Agricultural Sciences,Tianshui Gansu 741000,China)

机构地区：[1]天水市农业科学研究所,甘肃天水741000

出　　处：《甘肃农业科技》2022年第2期63-67,共5页Gansu Agricultural Science and Technology

基　　金：天水市科技支撑计划项目(2019-NCK-6187、2021-NCK-1514)。

摘　　要：为了解武山县蔬菜大棚土壤重金属污染情况,从天水市武山县8个镇的蔬菜大棚中采集48份土壤样品,结合国家土壤重金属评价标准,应用单因子污染指数法、内梅罗综合污染指数法和潜在生态风险指数法对其重金属(Ni、Cu、Zn、Cd、Pb、As、Hg)含量进行分析评价。结果表明,天水市武山县蔬菜大棚土壤状况总体处于安全范围,与甘肃省背景值比较,7种重金属元素均出现不同程度的积累,局部点位Cu、Cd元素存在一定程度的超标,潜在生态风险水平为中—强度,Hg对潜在生态风险指数的贡献为76.8%,是潜在的致险因子。To understand the content of heavy metals in the soil of vegetable greenhouses in Wushan county,48 soil samples were collected from vegetable greenhouses in 8 towns of Wushan county,Tianshui city. The contents of heavy metals(Ni,Cu,Zn,Cd,Pb,As,Hg) were analyzed and evaluated by single factor pollution index,Nemerow comprehensive pollution index and potential ecological risk index. The results showed that the soil condition of vegetable greenhouse in Wushan county of Tianshui city was generally in a safe range,and compared with the background value of Gansu province,seven kinds of heavy metal elements were accumulated in different degrees;Cu and Cd elements at local points exceeded the standard to a certain extent,and the potential ecological risk level was medium-intensity. Hg contributed 76.8% to the potential ecological risk index,which was a potential risk factor.

关 键 词：武山县 蔬菜大棚 土壤 重金属 含量 评价 

分 类 号：X53[环境科学与工程—环境工程]