摘要
以种植红托竹荪的基地土壤中重金属为研究对象,共采集19个基地的土壤样品,利用原子荧光法和原子吸收法测其重金属的含量,对基地土壤中重金属的富集系数和生态危害系数以及生态危害指数进行了分析,采用了瑞典学者LarsHakanson潜在生态危害指数法对基地土壤中重金属的生态危害进行了评价。结果表明:土壤中铬和铅的含量较高,汞的含量较低,其含量的大小顺序为Cr>Pb>As>Cd>Hg;镉对基地土壤生态环境已造成较强或很强的生态危害,砷、铅、铬等重金属未对基地土壤造成生态危害。3、9、13、14和18号基地不适合作红托竹荪种植基地;1、2、7、8、12、15和16号基地符合红托竹荪种植基地要求。
The heavy metals in soils of Dictyophora rubrovalvata bases of Guizhou Province were selected as the research object in the paper. Soil samples from 19 bases were collected and the contents of heavy metals in the samples were detected by use using AAnalyst800 and AF-640. The enrichment coefficients, ecological risk factors and risk indices of the heavy metals in the base soils were analyzed. Ecological risk of the heavy metals was assessed by the Lars Hakanson potential ecological risk index method. The results showed that the contents of chromium and lead were in higher level, while that of the hydrargyrum was low, and they followed the order Cr〉Pb〉As〉Cd〉Hg. It is shown from the risk indices that cadmium has done serious harm to the soil environment at the bases, while arsenic, lead, chromium and other heavy metals do not show ecological risk to the base soils. The No. 3, 9, 13, 14, 18 bases are not applicable for planting Dictyophora rubrovalvata, while No. 1, 2, 7, 8, 12, 15, 16 bases are fit for the requirements of the bases.
出处
《土壤通报》
CAS
CSCD
北大核心
2013年第3期719-722,共4页
Chinese Journal of Soil Science
基金
贵州省社会发展攻关项目(黔科合SY[2009]3024号)
贵州省自然科学基金项目(黔科合J字[2010]2031号)
理论化学与分子模拟省部共建教育部重点实验室开放课题基金项目(LKF1003)资助
关键词
红托竹荪
土壤
重金属
生态危害
风险评价
Dictyophora rubrovalvata
Soil
Heavy metal
Ecological hazards
Risk assessment
