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Analysis of relations of heavy metal accumulation with land utilization using the positive and negative association rule method

文献类型： 外文期刊

作者： You Dongmei 1 ; Zhou Jiaogen 3 ; Wang Jihua 1 ; Ma Zhihong 1 ; Pan Ligang 1 ;

作者机构： 1.Natl Engn Res Ctr Informat Technol Agr, Beijing 100097, Peoples R China

2.China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China

3.Shanghai Acad Agr Sci, Ctr Agr Engn & Technol, Shanghai 201106, Peoples R China

关键词： Heavy metal accumulation;Land utilization;Positive and negative association rule

期刊名称：MATHEMATICAL AND COMPUTER MODELLING （ 影响因子：1.366； 五年影响因子：1.602 ）

ISSN：

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收录情况： SCI

摘要： 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 Δd, 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 => Δd. 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.

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