大兴安岭北部地区落叶松和白桦树稀土元素分布特征  

The REE distribution of Larix gmelini and Betula platyphylla from North Da Xing'an Ling Mountains

作　　者：郝立波[1] 马力[1] 甘树才[1] 王松君[1] 常平[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,吉林长春130026

出　　处：《吉林大学学报（地球科学版）》2004年第3期351-355,共5页Journal of Jilin University：Earth Science Edition

基　　金：中国地质调查局地质大调查资助项目(20002010002106;200320120005)

摘　　要：大兴安岭北部的落叶松和白桦树对稀土元素Eu选择吸收性十分明显。Eu的生物吸收系数是其它稀土元素的20倍以上。落叶松和白桦树稀土元素均具有明显的铕正异常。落叶松和白桦树对二价金属元素Zn、Sr也具有强烈的摄取能力,而对一价和高价金属元素吸收能力较弱。土壤的稀土元素不是影响植物中稀土元素分布特征的重要因素。该区落叶松和白桦树稀土元素分布特征与水土壤植物系统的物理化学条件具有密切的关系。The Larix gmelini and Betula platyphylla Suk. have selective absorption for Eu from Da Xing'an Ling Mountains. The absorption coefficient of Eu is 20 times higher than other rare earth elements. The Larix gmelini and Betula platyphylla. have great Eu positive anomaly in this area and they also have stronger absorption ability for bivalent metals such as Zn or Sr than that for that of monovalent and high valence metals. The REE abundance of soil is not key control for the REE distribution of plant, and the later is closely related to physicochemical conditions of the water-soil-plant system.

关 键 词：稀土元素 落叶松 白桦 生物吸收 大兴安岭 

分 类 号：P595[天文地球—地球化学]