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XieYini,YeLonghua,LiXiaochuan,DingXiaogang,YangHaiyan,ZhangGeng,QiYe
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Heavy metal content and its pollution in the soils in the habitat area of camellia oleifera in Yunfu City, Guangdong, China
Xie Yini,Ye Longhua,Li Xiaochuan,Ding Xiaogang,Yang Haiyan,Zhang Geng,Qi Ye
(Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization / Guangdong Academy of Forestry;Guangdong Provincial Forestry Technology Extension Station)
Abstract:
The soils in the Camellia oleifera habitat areas in Yunfu city were sampled with the methods of distributing random spots, special spots and forest distribution points. to determine the contents of five heavy metal elements (Zn, Cu, Pb, Cd and Ni) and their potential pollutions. The results showed that five heavy metal elements varied more than 50%, a medium intensity variation. There were significant differences in heavy metal contents among 5 locations sampled in Yunfu city. The overall average of the contents of five elements were lower than the second level of the soil environmental background value and the soil environmental quality standards issued in Guangdong Province. The single factor pollution index showed the highest degree pollution of Cu. The overall Nemerow pollution index of Yunfu city was 0.73, which was at the level 2 of the pollution class,or clean level. By contrast, Yunan county, Yuncheng district and Yun’an district, the subordinates of Yunfu city, had a comprehensive soil pollution at the level 3, the light pollution while Luoding city reachedthe warning level compared to the non-pollution in Xinxing county. Therefore, it is alarming that the pollution of Yunan county, Yuncheng district, Yun’an district and Luoding city should be controlled by measures of the combination of physics, chemistry and biology
Key words:  Yunfu city · Camellia oleifera habitat area · Heavy metal · Variation · Pollution evaluation

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