摘要
Abstract
Through testing five heavy metal contents in the soil of the vegetable greenhouses in the suburbs of Lanzhou City and combined with the national assessment of soil heavy metal standard,by using the single factor pollution index method and Nemerow pollution index method,evaluate pollution was conducted.Results showed that the soil in vegetable greenhouses were lightly polluted in the surrounding countries such as Dingyuan Town of Yuzhong County,the content of Cr and Ni were superscale,the content of Cu,Zn and Pb were normal.Combining with regional soil background values,vegetable crops cultivations,fertigation situation and environment characteristics,it’s concluded that the heavy metal pollution comes from two aspects,inlcuding agricultural solid waste and the non-standard landfill of household waste,the other was the overuse of chemical fertilizers and pesticides,so some ways should be adopted to stop soil heavy metal content in vegetable greenhouses.关键词
蔬菜大棚/土壤/重金属/评价/甘肃兰州/定远镇Key words
vegetable greenhouses/soil/heavy metal/evaluation/Lanzhou Gansu/Dingyuan Town分类
资源环境
