摘要
探讨贵州杜仲产区的土壤重金属污染状况,为杜仲的生态种植选地提供参考。采用原子吸收分光光度计测定铜(Cu)、镉(Cd)、铅(Pb)、汞(Hg)、砷(As) 5种重金属的含量,通过单因子污染指数法、内梅罗污染指数法和潜在生态风险指数法对土壤环境质量进行评价分析,并对5种重金属元素进行了相关性分析及探讨它们与p H的关系。结果显示,黎平(LP)、施秉(SB)、正安(ZA-2)产地的土壤重金属含量较低,LP土壤符合国家一级标准,其他符合国家二级标准;LP、正安(ZA-1)、ZA-2产地的土壤为清洁状态,花溪(HX)、播州(BZ-1)产地的土壤为轻污染状态,污染程度Cu>Pb>As>Cd>Hg;播州(BZ-2)产地的土壤为轻警(中等生态风险),HX、BZ-1和湄潭(MT)产地的土壤为预警(低生态风险),主要警源为Cu和Pb,其余为无警(无生态风险);Cd,As与Pb,Hg呈正相关,Cd,Pb,As与p H呈正相关。LP,SB,ZA-1,ZA-2土壤洁净,可用于杜仲的继续种植,HX,MT,BZ-1,BZ-2土壤有污染,应及时采取有效措施进行治理。
In order to understand the pollution of heavy metals in Guizhou soil planting Eucommia ulmoides,the paper has determined the contents of five heavy metals respectively( Cu,Cd,Pb,Hg and As) by atomic absorption spectrophotometry. The soil environmental quality by single factor pollution index was evaluated,nemerow integrated pollution index and potential ecological risk index,the correlation of 5 heavy metals was analyzed and the relationship between heavy medals content and p H value was discussed. The results showed that: ①The soils of LP,SB and ZA-2 had low heavy metals content,LP soil met the first national standard,and other soils met the second national standard;②The soils of LP,ZA-1 and ZA-2 were all in a clean state,while HX and BZ-1 were in a light pollution state,and the pollution degree was Cu>Pb>As>Cd>Hg;③The soil of BZ-2 was light warning( medium ecological risk),the soils of HX,BZ-1 and MT were early warning( low ecological risk),the main warning source was Cu and Pb,and the rest were no warning( no ecological risk);④Cd and As were positively correlated with Pb and Hg,and Cd,Pb and As were positively correlated with p H. The research showed that the soils of LP,SB,ZA-1 and ZA-2 were clean and could be used for E. ulmoides to continue planting,the soils of HX,MT,BZ-1 and BZ-2 were polluted and should be treated in time by effective measures.
作者
张新秦
周涛
肖承鸿
江维克
郭兰萍
杨昌贵
ZHANG Xin-qin;ZHOU Tao;XIAO Cheng-hong;JIANG Wei-ke;GUO Lan-ping;YANG Chang-gui(Guizhou University of Traditional Chinese Medicine,Guiyang 550025,China;National Resource Center for Chinese Materia Medica,China Academy of Chinese Medical Sciences,Beijing 100700,China)
出处
《中国中药杂志》
CAS
CSCD
北大核心
2019年第17期3627-3632,共6页
China Journal of Chinese Materia Medica
基金
国家科技基础性工作专项(2015FY111500)
国家重点研发计划项目(2017YFC1700703)
贵州省高层次创新型人才(黔科合平台人才[2018]5638)
现代农业产业技术体系建设专项(CARS-21)
贵州省国内一流建设学科项目(中药学)(GNYL[2017]008号)
贵州省教育厅创新群体重大研究项目(黔教合KY字[2018]022)
关键词
土壤
重金属
污染
评价
生态种植
soil
heavy metal
pollution
evaluation
ecological planting
