摘要
玉米与石榴重金属富集能力差异对于指导和调整土壤污染区的农产品种植具有重要的意义。通过土壤及农作物样品采集,分析玉米和石榴的重金属富集系数差异。研究表明:1石榴中Cd、Cr、Pb、As超标率分别为3.70%、25.93%、74.07%、7.41%,而玉米中Cr、Pb超标率分别为3.7%、22.22%,石榴中重金属超标现象明显高于玉米,且富集Cd、Pb、As能力远超过玉米;2不同土壤重金属含量下,石榴重金属超标现象亦较玉米显著。除高土壤重金属含量时富集Cr能力相近外,石榴富集Cd、Cr、Pb、As能力总体高于玉米,尤其是土壤重金属低含量时,明显高于玉米。综合认为,相同土壤重金属污染情况下,石榴较玉米更易吸收Cd、Cr、Pb、As,从农产品食用安全角度考虑,当地应优化农业生产布局,多种玉米而少种石榴。
Different enrichment capabilities of heavy metals between maize and pomegranate have important significance for guiding and adjusting agricultural products in the polluted land. Based on collecting soil and plant samples, the authors analyzed different enrich-ment coefficients of heavy metals between corn and pomegranate. Some conclusions have been reached: ①The average standard rate of Cr, Pb, Cd and As in pomegranate samples is 3.70%, 25.93%, 74.07%and 7.41%respectively, and the average standard rate of Cr and Pb in corn sample is 3.7%and 22.22%respectively. The standard-surpassing phenomenon of heavy metals in pomegranate is more obvious than that in maize, and the enrichment capability of pomegranate for Cd, Pb, As is obviously higher than that of maize;②As for heavy metal content of different soils, the standard-surpassing phenomenon of pomegranate is more obvious than that of maize. Pomegranates can enrich more Cd, Cr, Pb and As than maize except for Cr. Especially in low heavy metal content soil, the standard-surpassing phenomenon of pomegranate is significantly higher than that of maize. It is thus held that pomegranate can absorb more Cd, Cr, Pb, As than corn in soils suffering the same heavy metal pollution and that, from the angle of the safety of edible agricultural prod-ucts, the local government should optimize the layout of agricultural production and grow more maize and less pomegranate.
出处
《地质通报》
CAS
CSCD
北大核心
2014年第8期1175-1181,共7页
Geological Bulletin of China
基金
国土资源部公益性行业科研专项(编号:201111020-3)
关键词
重金属污染
富集系数
农业布局
锡矿区
云南
heavy metal pollution
enrichment factor
agriculture layout
tin mining area
Yunnan Province