武夷岩茶主产区土壤及茶叶微量元素分布特征

为研究武夷岩茶主产区土壤及茶叶中微量元素的分布特征，采集武夷岩茶主产区(名岩区和丹岩区)土壤和茶叶样品，检测Co、 Mo、 Se、 Zn、 Cu、 Cr、 Pb、 Cd、 As和Hg十种微量元素含量，并运用相关性分析土壤对茶叶微量元素富集的影响。结果表明，名岩区土壤累积的微量元素(除As外)含量不如丹岩区丰富。茶叶对不同元素富集系数值差异明显，对Cu和Hg的富集能力最强，对Zn、 Se和Cd的富集能力较强，而对非必需元素As、 Pb和Cr的富集能力最弱。两茶区茶叶中Hg和Co含量差异最大，土壤元素含量对茶叶中微量元素含量影响很大。名岩区的土壤和茶叶样本中微量元素含量均在国家标准范围内；丹岩区的部分土壤样本中Cu、 Cr含量超出茶叶产地标准限值，但茶叶样本均在安全范围内，且Co含量较高。

Distribution characteristics of trace elements in the soils and tea leaves in Wuyi Yantea Provenance

In order to study the distribution characteristics of trace elements in the soils and tea leaves in Wuyi Yantea provenance ( Mingyan and Danyan) of Wuyishan City, tea garden soils and the corresponding tea samples were collected, and the contents of 10 trace elements including Co, Mo, Se, Zn, Cu, Cr, Pb, Cd, As and Hg were determined. In addition, correlation analysis was conducted to examine the effect of the content of trace element in tea garden soils on the trace element enrichment in tea leaves. The results showed that:there were higher contents of trace element, except As, in Danyan soil than that of Mingyan soil. Enrichment factors in tea leaves varied fiercely among elements. The enrichment ability of Cu and Hg is the highest, followed by Zn, Se and Cd, and non￣essential elements such as As, Pb and Cr is the lowest. Between Mingyan and Danyan, the most obvious difference of trace element content was found at Hg and Co. The trace element contents in soil had a great influence on that in tea leaves. Element contents of soil and tea leaves from Mingyan were all under the national standard. In Danyan, contents of Cu and Cr of several soil samples were beyond the permitted limit of national standard, while element contents of tea samples were conformed to the safe range, although with high Co content.