农业环境科学学报Issue(8)：1532-1537,6.DOI:10.11654/jaes.2014.08.010
植烟土壤重金属的有效性及影响因素研究
Availability of Heavy Metals and Its Influencing Factors in Tobacco Grown Soils
摘要
Abstract
Research has showed that total contents of heavy metals in soils are not a good indicator of their eco-environmental impacts. Here availability of heavy metals including As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn in 440 tobacco grown soils was investigated and possible sources of heavy metals were also explored. The average available concentrations of heavy metals were 0.92, 0.075, 0.75, 1.62, 0.004, 1.89, 1.14 mg· kg-1, and 1.94 mg·kg-1 for As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn, respectively. The coefficient of variation(CV)of heavy metal contents ranged from 48.97%to 95.64%, with the greatest variation for Hg and Pb(CV was 95.64%and 90.56%, respectively). These data suggested that available Hg and Pb in soils were largely influenced by human activities, causing extremely uneven distribution. Each of available As, Cd, Ni, Pb, and Zn was highly correlated with most of these 8 elements, implying that they had common sources;while available Cr had very weak correlation with other metals, showing its unique sources. Principal component analysis showed that the availability of heavy metals was strongly influenced by industrial and agricultural sources as well as atmospheric deposition. In addition, soil properties influenced metal availability:soil pH was significantly negatively correlated with available Cd and Pb(P﹤0.01)and available Cr(P﹤0.05);soil organic matter had significantly positive correlation with available Cd and Pb(P﹤0.01), and available As, Zn and Ni(P﹤0.05), implying that soil organic matter was an important factor influencing the availability of heavy metals.关键词
植烟土壤/重金属/有效性/影响因素Key words
tobacco-grown soil/heavy metals/availability/influencing factors分类
农业科技引用本文复制引用
王春香,徐宸,许安定,陈玉成,杨志敏,杨超..植烟土壤重金属的有效性及影响因素研究[J].农业环境科学学报,2014,(8):1532-1537,6.基金项目
中国烟草总公司科技重点项目 （）
