摘要
根据有关中国农田土壤重金属相关文献的统计数据,对中国各地区农田土壤中重金属元素含量对土壤环境的影响进行综合评价。采用对应分析法确定中国各地区土壤与重金属元素之间的对应关系,并利用TOPSIS法确定中国各地区土壤重金属元素的权重及其污染程度,然后进行综合排序。结果表明:南方地区的土壤污染程度明显高于北方地区。其中,贵州、湖北、云南、四川、湖南、广西等省份以及北京、天津两市受土壤重金属污染程度较高(各地区主要污染元素不同),同比均超过国家标准;其余省份危害程度较低,同比低于或符合国家标准。根据各地区农田土壤重金属含量的分布规律以及主要的重金属污染元素,对农田土壤采取相应的防护治理措施,进而减少重金属元素对农田土壤环境的危害。
According to the statistical data concerning the relevant literature on soil heavy metals in farmland in China,comprehensive evaluation was conducted on the impact of heavy metal elements content on the soil environment in farmland soils in various regions of China.Correspondence analysis method was used to determine the corresponding relationship between soil and heavy metal elements in various regions of China.The TOPSIS method was used to determine the weights and pollution degree of heavy metal elements in soils in various regions of China.The results show that the degree of soil pollution in the southern region is significantly higher than in the northern region.Among them,Guizhou,Hubei,Yunnan,Sichuan,Hunan,Guangxi and other provinces and Beijing and Tianjin were highly polluted by heavy metals in the soil(different pollution elements in different regions),which exceeded the national standards year-on-year;the remaining provinces were less harmful.The year-on-year is lower than or in line with national standards.According to the distribution rules of heavy metal content in farmland soils and the main elements of heavy metal pollution in various regions,corresponding protective measures are taken to the farmland soil,thereby reducing the harm of heavy metal elements to the farmland soil environment.
作者
李植花
赵昕
杨宏建
Li Zhihu;Zhao Xin;Yang Hongjian(School of Mathematics and Big Data,Huizhou University,Huizhou,Guangdong 516007,China;College of Chinese Information Technology,Jilin Agricultural University,Changchun 130118,China)
出处
《科技通报》
2020年第2期98-105,共8页
Bulletin of Science and Technology
基金
长春市惠宝君子兰科技养殖及药理活性研究项目(2010040101)
