绿洲农业科学与工程2026，Vol.11Issue(2)：112-120,9.DOI:10.26941/j.cnki.2096-2177.2026.02.017
湘西北地区黑色岩系重金属高背景元素地球化学特征及迁移演化规律研究
Study on the Geochemical Characteristics of High-Background Heavy Metals in Black Rock Series and Their Migration and Evolution Laws in Northwest Hunan Region
摘要
Abstract
The black rock series in the northwest region of Hunan Province contains various metal elements,especially heavy metal elements,poses a potential threat to the ecological environment.To determine the specific impact of these elements on the soil and crops,this study systematically analyzed the content and enrichment characteristics of heavy metal elements in the rock series and its original weathered soil,revealing the migration and evolution laws of heavy metal elements from the rock-original weathered soil-rice field root soil-rice grains in the high background layer of heavy metals of the black rock series.The results showed that during the surface weathering process,the heavy metal elements in the black rock series all exhibited a strong enrichment characteristic in the weathered soil.However,during the transformation from the original weathered soil to the rice field root soil,most elements generally showed a downward trend.The decline in different elements at different layers was different,and this difference was the result of the combined effects of background content,surface environment and human factors;the absorption capacity of rice for heavy metal elements was generally low,but when the heavy metal content in the rice field soil reached a certain level,the absorption amount of rice would significantly increase,thereby causing the rice to exceed the heavy metal limit.This study provides key scientific basis for clarifying the impact degree of the high background of heavy metals in the black rock series on farmland soil and crops and for pollution prevention and control.关键词
重金属高背景/迁移演化/黑色岩系/湘西北地区Key words
high background heavy metals/migration and evolution/black rock series/Northwestern Hunan Region分类
资源环境引用本文复制引用
陈碧莹,张静鸿,黄朝宇,王雪平,刘玉,陈金,陈云华..湘西北地区黑色岩系重金属高背景元素地球化学特征及迁移演化规律研究[J].绿洲农业科学与工程,2026,11(2):112-120,9.基金项目
湖南省科技厅2024年部门联合基金项目(2024JJ8384) Joint Fund Project of Hunan Provincial Department of Science and Technology in 2024(2024JJ8384) （2024JJ8384）
