云南部分古茶园土壤重金属元素的监测与评价
Monitoring and Evaluation of Heavy Mental Content in the Soil of Ancient Tea Garden
陈保 1姜东华 1李光涛 2梁涛 2张怀志1
作者信息
- 1. 国家普洱茶产品质量监督检验中心(普洱市质量技术监督综合检测中心),云南普洱 665000
- 2. 普洱市职业教育中心,云南普洱 665000
- 折叠
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.
Abstract
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.
关键词
云南/古茶园/土壤/重金属/污染评价Key words
Yunnan/Ancient tea garden/Soil/Heavy metal/Pollution evaluation引用本文复制引用
出版年
2012
国家科技期刊平台
NSTL
维普
万方数据