摘要
对10个云南古茶园(种植年限为百年、数百年甚至千年)50个土壤样品的金属元素As、Pb、Cd、Hg、Cr、Cu、Fe、Mn、Zn和Se的含量进行测定,研究其分布特征和变化规律,并用污染指数方法评价其土壤环境质量。结果表明:云南古茶园土壤Fe和Mn含量较高,Se含量较低,Pb(10.7～33.5 mg/kg),Hg(0.030～0.148 mg/kg),Cd(0.033～0.120 mg/kg),Zn(21.4～87.3 mg/kg)均达到国家土壤环境质量一级标准;Cr(15.4～98.5 mg/kg),As(12.2～33.1 mg/kg),Cu(13.6～43.4 mg/kg)均达到国家土壤环境质量二级标准。根据土壤环境质量二级标准评价古茶园土壤重金属综合污染状况,所有古茶园综合污染指数小于0.7,表明古茶区土壤属于清洁水平,未受重金属污染,满足有机茶园环境条件,适合建设有机茶园。
The distribution and changing characteristics and content of soil metals （As, Pb, Cd, Hg, Cr, Cu, Fe, Mn, Zn and Se） were studied, and the pollution indices were used to evaluate the soil environmental quality of 50 soil samples of 10 ancient tea gardens （hundreds of years or even thousands of years of cultivation）. The results showed that the content of Fe and Mn were higher but that for Se was lower; the content of Pb （10.7-33.5 mg/kg）, Hg （0.030-0.148 mg/kg）, Cd （0.033-0.120 mg/kg）, Zn （21.4-87.3 mg/kg） were low enough to meet the the first grade of State Environmental Quality for Soils; the content of Cr （15.4-98.5 mg/kg）, As （12.2-33.1 mg/kg）, Cu （13.6-43.4 mg/kg） were low to meet the the second grade of State Environmental Quality for Soils. The integrated pollution index for the soils of the ancient tea gardens was less than 0.7, which was in the ＂clean＂ grade. The ancient tea gardens meet the environmental conditions of the organic tea garden, and is suitable for the construction of organic tea gardens.
出处
《热带作物学报》
CSCD
北大核心
2012年第12期2262-2266,共5页
Chinese Journal of Tropical Crops
基金
普洱市科技项目(2010-11)
关键词
云南
古茶园
土壤
重金属
污染评价
Yunnan
Ancient tea garden
Soil
Heavy metal
Pollution evaluation
