Analysis of relations of heavy metal accumulation with land utilization using the positive and negative association rule method
Tracing of heavy metal pollution sources is a current hot issue of agricultural soil quality management. Land utilization is one of the important factors which affect the heavy metal contents of regional soil. In order to model the relationship between soil heavy metal contamination and land utilization, this paper adopts a novel positive and negative association rule method in order to effectively find the probabilities of different dual events which occur simultaneously and frequently. Given the item set Ad, which are the differences between the values of As, Cd, Cr, Cu, and Hg contents and the corresponding background values, and the set of land use types T, consisting of grain farm, vegetable farm, orchard and forest land, we find the dual association rule T=? △d. With soil heavy metal data collected in 2006-2008 from Beijing, the experimental results demonstrate that land utilization has made a greater contribution to the accumulation of the concentrations of Hg and Cd than to that of the concentrations of As, Cr and Cu.
Heavy metal accumulation Land utilization Positive and negative association rule
You Dongmei Zhoujiaogen Wangjihua Ma Zhihong Pan Ligang
College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, Chin Center of Agricultural Engineering and Technology, Shanghai Academy of Agricultural Science, Shangha National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, Chin
国际会议
南昌
英文
1005-1009
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）