贵州蓝莓核心产区岩石-土壤-植物系统稀土元素地球化学特征  

Geochemical Characteristics of Rare Earth Elements in Rock Soil Plant System in Blueberry Core Production Area of Guizhou Province

作　　者：李朝峰 李启航 刘岚君 王衡[3] 文雪峰[1] Li Chaofeng;Li Qihang;Liu Lanjun;Wang Heng;Wen Xuefeng(Agricultural College,Guizhou University,Guiyang 550025,China;Bijie Agricultural and Rural Bureau,Bijie 551700,China;School of Public Management,Guizhou University of Finance and Economics,Guiyang 550025,China)

机构地区：[1]贵州大学农学院,贵州贵阳550025 [2]毕节市农业农村局,贵州毕节551700 [3]贵州财经大学公共管理学院,贵州贵阳550025

出　　处：《中国稀土学报》2021年第4期653-662,共10页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(41563011);商务部联合研究基金重点项目:“两江上游”精准扶贫脱贫研究(2016SWBZD19);贵州省教育厅自然科学项目(黔教合KY字[2017]151);贵州省科技计划项目(黔科合基础[2020]1Y190)资助。

摘　　要：农作物品质与立地环境地球化学条件关系密切,探明种植区岩石-土壤-植株系统的元素地球化学特征对作物生产具有重要意义。采用野外实地调查与室内分析相结合的方法对贵州蓝莓核心产区的岩石、土壤、蓝莓植株、蓝莓果实稀土元素地球化学特征进行调查分析。结果表明:研究区岩石和土壤稀土元素平均值分别为8.561,112.68 mg·kg^(-1),均较为匮乏,其中,岩石Ce,Eu均呈负异常,土壤呈Ce正异常,轻稀土元素较重稀土元素富集,表层土壤稀土元素含量较剖面底部高。研究区土壤稀土元素分布曲线与岩石的基本一致,且各层土壤稀土元素的分配模式具有一定的相似性。蓝莓根、茎、叶、果实的稀土元素含量规律相似,均以La,Ce,Nd,Y为主,呈现出根>叶>茎>果实的特征,且分布曲线呈右倾模式。蓝莓植株的稀土元素的分布模式与岩石、土壤基本一致,岩石-土壤-植物系统稀土元素的继承性明显。通过不同层次间的转移系数计算发现,蓝莓根系对稀土元素的吸收能力较弱,叶、果间稀土元素的迁移能力最弱,茎、叶间的迁移能力较强。Crop quality is closely related to site environmental geochemical conditions. It is of great significance for crop production to explore the element geochemical characteristics of rock soil plant system in planting area. In this paper, the geochemical characteristics of REEs in rocks, soils, blueberry plants and blueberry fruits of blueberry core producing areas in Guizhou Province were investigated by field investigation and indoor analysis. The results showed that the average values of REEs in rocks and soils are 8.561 and 112.68 mg·kg^(-1), respectively, which are relatively deficient. Ce and Eu in rocks are negative anomalies, while Ce is positive anomalies in soils. LREE is richer than HREE, and the content of REEs in surface soil is higher than that in the bottom of soil profile. The distribution curves of REEs in soils in the study area are basically consistent with those in rocks, and the distribution patterns of REEs in soils in different layers are similar to some extent. The contents of REEs in the roots, stems, leaves and fruits of blueberry were similar with La, Ce, Nd and Y, showing the characteristics of roots > leaves > stems > fruits and the distribution curve showed a right-leaning pattern. The distribution pattern of REEs in blueberry plants is basically consistent with that in rock and soil, and the inheritance of REEs in rock-soil-plant system is obvious. By calculating the transfer coefficient between different layers, it was found that the absorption capacity of REEs in blueberry roots is weak, the migration capacity of REEs between leaves and fruits is the weakest, and the migration capacity between stems and leaves is strong.

关 键 词：贵州蓝莓 稀土元素 地球化学特征 

分 类 号：P595[天文地球—地球化学]