不同茶树种质间稀土元素积累差异研究

以福建安溪和武夷山两个不同自然环境条件下的55个茶树种质为材料,采摘其春季、夏季和秋季的一芽三叶鲜叶,采用ICP–MS测定其稀土元素含量。结果表明不同的茶树种质对稀土元素有着不同程度的积累差异,种质间差异达到极显著(P0.01)。55个茶树种质间对稀土元素的吸收在不同季节、不同生境条件下均差异显著,安溪13个种质稀土元素含量表现为春季大于夏季和秋季,10个种质样品安溪的平均稀土元素含量高于武夷山的。高(5.0 mg·kg~(-1))、中(2.0~5.0 mg·kg~(-1))、低(0.91~2.0 mg·kg~(-1))含量安溪茶树种质数量分别有1、40、14个。筛选结果为后续的品种鉴定和选育低吸收稀土元素茶树品种,生产符合质量安全的茶叶提供依据。

Study of Accumulation and Distribution of the Rare Earth Elements in Different Tea Cultivars

In this paper,we collected 55 tea varieties as materials under 2 different natural environmental conditions,Anxi and Wuyishan in spring,summer and autumn.The study showed that the REE (rare earth element) content of different tea varieties (lines) significantly varies from different seasons and habitat conditions,it exists absorption of certain laws:REE content from 13 tea varieties in Anxi behaves spring is higher than summer and autumn,while it is higher in Anxi than Wuyishan from 10 tea varieties.This assay also screened high,medium and low three levels enrichment of REEs from 55 tea varieties,number of three enrichment levels each were 1 for high (＞ 5.0 mg · kg-1),40 for medium (2.0-5.0 mg · kg-1),14 for low (0.91 ～ 2.0 mg · kg-1),respectively.Thus providing reference for the next screening of anti-REE tea cultivars and gives a reference for the production of planting material when picking and processing tea fresh leaves.