农业环境科学学报2012，Vol.31Issue(5)：934-941,8.
渭北黄土高原苹果园土壤重金属空间分布及其累积性评价
Spatial Distribution and Cumulation Evaluation of Soil Heavy Metals in Apple Orchards of Weibei Area, the Loess Plateau
摘要
Abstract
From the apple orchards in the Weibei area of the southern Loess Plateau of China, 217 surface soil samples of 0~40 cm layer soil were collected to analysis the spatial distribution of 6 heavy metals( Hg, Cd, Pb. As, Cr and Cu) with the help of geo-statistical method and GIS technology. Simultaneously, soil environmental quality was evaluated according to the environmental quality standards of green food production ba3e by methods of both the single factor and the Nemerow multi-factor. The results indicate that the content of these 6 metals are cumulated in the studied apple orchards, especially the element of Hg and Pb, when compared with the corresponding natural background values. However, the soil environmental hazards to these 6 metals are little currently. Coefficient of variation of Hg and Cd are more than 50% and higher than that of Pb, As, Cr and Cu. Distribution of these 6 heavy metals present a stronger spatial relevance because their spatial pattern are mainly influenced by natural factors such as the soil parent material, climate, topography and other structural factors. Random factors play a relatively greater role in spatial variability of Cd than others listed as Cd > As > Hg > Pb > Cr > Cu. Single factor index of all metals are less than 1 and their multi-factor index are less than 0.7, it shows that the studied apple orchards meet the needs of the green food production base for further development. On the other hand, the content of As may have a potential negative influence to the green food production, therefore, real-time monitoring and protection measures are required to prevent its further enrichment.关键词
重金属/空间分布/土壤环境质量/苹果园/黄土高原Key words
heavy metals/ spatial distribution/ soil environmental quality/ apple orchard, Loess Plateau分类
资源环境引用本文复制引用
胡克宽,王英俊,张玉岱,李会科,梅立新,梁俊..渭北黄土高原苹果园土壤重金属空间分布及其累积性评价[J].农业环境科学学报,2012,31(5):934-941,8.基金项目
公益性行业(农业)科研专项(201103005-9) （农业）
国家现代农业产业技术体系(CARS-28) （CARS-28）
陕西省科技攻关(2010K01-04-2)资助 （2010K01-04-2）
陕西省科技统筹创新工程计划(2011KTZB02-02-05) （2011KTZB02-02-05）
