摘要
土壤重金属污染日益加剧,严重威胁粮食安全和人类健康。以江西鹰潭市稻田为研究区,采集53个耕层土壤样品,参照江西省土壤背景值和农用地土壤污染风险筛选值,分别采用单因子污染指数、地累积指数及改进前后的内梅罗污染指数评价法,对稻田土壤镉、砷、铬、汞、铅等重金属含量及pH进行检测,以评价土壤污染现状。结果表明:土壤pH平均值为5.41;土壤重金属铬、砷、镉、汞和铅的平均含量分别为67.28、5.72、0.36、0.11、38.86 mg·kg^(-1),存在重金属镉污染风险;对土壤重金属综合污染进行评价的各指数水平由高到低依次为以江西省土壤背景值为参比的改进型内梅罗污染指数、以农用地土壤污染风险筛选值为参比的内梅罗综合污染指数、以江西省土壤背景值为参比的内梅罗综合污染指数。综上,应选择以地累积指数为基础的改进型内梅罗污染指数法评价稻田土壤重金属污染,可为农业安全生产提供数据支撑。
The soil heavy metal pollution has become increasingly severe,posing significant threats to food security and human health.This study investigated paddy fields in Yingtan city,Jiangxi province,and analyzed 53 topsoil samples for cadmium,arsenic,chromium,mercury,lead concentrations and pH levels.Using Jiangxi's soil background values and agricultural land risk screening values as benchmarks,we evaluated pollution status through four methods:single-factor pollution index,geo-accumulation index,and both conventional and modified Nemerow pollution indices.The results showed that:①Average soil pH was 5.41;②Mean heavy metal concentrations(mg·kg^(-1))were chromium 67.28,arsenic 5.72,cadmium 0.36,mercury 0.11,and lead 38.86,with cadmium exceeding safety thresholds;③The comprehensive pollution evaluation levels of heavy metals in soil were ranked from high to low as follows:modified Nemerow index referenced to provincial background values>conventional Nemerow index using risk screening values>conventional Nemerow index using background values.The study recommends adopting the modified Nemerow index(integrated with geoaccumulation evaluation)for paddy soil evaluation,providing critical data support for agricultural safety management.
作者
吴俊颖
曲斌
熊江花
陈柳萌
甄峰
WU Junying;QU Bin;XIONG Jianghua;CHEN Liumeng;ZHEN Feng(Yingtan Agricultural Technology Extension Centre,Yingtan 335000,China;College of Arts and Sciences,Northeast Agricultural University,Harbin 150030,China;Graduate Workstation of Integration of Industry and Education,Guangzhou Institute of Energy Conversion Chinese Academy of Sciences,Northeast Agricultural University,Harbin 150030,China;Jiangxi Agricultural Ecology and Resources Protection Station,Nanchang 330006,China;Institute of Applied Agricultural Microorganism,Jiangxi Academy of Agricultural Sciences,Nanchang 330200,China;Guangzhou Institute of Energy Conversion,Chinese Academy of Science,Guangzhou 510640,China)
出处
《扬州大学学报(农业与生命科学版)》
北大核心
2025年第3期139-146,共8页
Journal of Yangzhou University:Agricultural and Life Science Edition
基金
国家自然科学基金资助项目(42467017)
广州市科技计划项目(2023B03J1229)
赣州市重点研发计划项目(GZ2024ZDZ009)。
关键词
稻田
土壤
重金属
评价
改进型内梅罗污染指数
paddy fields
soil
heavy metals
evaluation
modified Nemerow pollution index
作者简介
吴俊颖(1974-),女,江西鹰潭人,鹰潭市农业技术推广中心高级农艺师,主要从事农业资源与环境研究;通信作者:甄峰,中国科学院广州能源研究所高级工程师、博士,主要从事农业废弃物资源化利用研究,E-mail:zhenfengms.giec.ac.cn。
