• 关键词：稀土元素  水稻  累积  迁移  朱溪流域

• 基金项目：国家自然科学基金（No.41371512）；福建省自然科学基金（No.2017J01462）；福建省社会科学规划项目（No.FJ2016C046）

• 马倩怡
• 福建师范大学, 地理科学学院, 福州 350007

• 陈志强
• 1. 福建师范大学, 地理科学学院, 福州 350007;2. 湿润亚热带山地生态国家重点实验室培育基地, 福州 350007

• 陈志彪
• 1. 福建师范大学, 地理科学学院, 福州 350007;2. 湿润亚热带山地生态国家重点实验室培育基地, 福州 350007

• 张青青
• 1. 福建师范大学, 地理科学学院, 福州 350007;2. 湿润亚热带山地生态国家重点实验室培育基地, 福州 350007

• 曾月娥
• 泉州师范学院, 资源与环境科学学院, 泉州 362000

• 摘要：稀土元素通过植物吸收经食物链最终进入人体，并在人体中累积，进而影响食用人群的健康.水稻作为我国南方地区的主要粮食和经济作物，是人们生存的基础.本文通过南方花岗岩红壤侵蚀流域水稻植株根系土壤及其各部位稀土元素含量的调查，探究稀土元素在土壤-水稻系统中的迁移累积特征.结果表明：研究区土壤中稀土元素含量平均值为389.02 mg·kg^-1，水稻土壤中呈现出重稀土元素相对富集的特点.土壤中稀土元素在Eu处呈亏损状态；除10号样点外，其他样点土壤的稀土元素在Ce处呈富集状态.水稻植株不同部位的稀土元素含量差异较大，水稻根、叶及稻谷中稀土元素含量的平均值分别为152.63、5.03和0.64 mg·kg^-1，呈根 > 叶 > 稻谷的规律.稻谷中的稀土元素含量虽未超过日均稀土元素的摄入量（5.33 μg·kg^-1·d^-1），但长期食用仍存在一定的健康风险.土壤稀土元素向水稻植株各部位的转移能力差异较大，呈根 > 叶 > 稻谷的规律.

• Abstract：Rare earth elements are absorbed by plants and eventually enter the human body through the food chain, and accumulate in the human body, affecting the health of the consumers. Rice, as the main grain and cash crop in the south of China, is the basis of people's survival. Therefore, through the investigation of rare earth elements in rice plant roots, soil and its parts in southern red soil erosion area of southern China, the migration and accumulation characteristics of rare earth elements in soil rice system were investigated. The results showed that:① The average value of REE content in soil was 389.02 mg·kg^-1, and heavy REE in paddy soil shows the character of relative enrichment. The rare earth elements in soil showed a deficit at Eu. Except for the sample 10, the REE in the other soil samples showed enrichment at Ce.② The content of rare earth elements in different parts of rice plant varies greatly. The contents of rare earth elements in rice roots, leaves and rice were 152.63 mg·kg^-1, 5.03 mg·kg^-1 and 0.64 mg·kg^-1, showing root contains more REE than leaf which has more REE than paddy. Although the content of rare earth elements in rice has not exceeded the average daily intake of rare earth elements(5.33 μg·kg^-1·d^-1), there are still some health risks in long-term consumption.③ The difference of transfer coefficients of rare earth elements in different parts of rice plant is also larger. The transferring ability of rare earth elements in rice plant shows the root contains more REE than leaf which has more REE than paddy.

• Key words：rare earth elements  paddy  accumulation  migration  Zhuxi basin

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