贵州省惠水县涟江大坝土壤硒分布特征及影响因素研究  

Distribution characteristics and influencing factors of Selenium in soil from Lianjiang Dam in Huishui County,Guizhou Province

作　　者：息朝庄 张鹏飞 吴林锋 杨茗钛 范云飞 夏浩东 XI Chaozhuang;ZHANG Pengfei;WU Linfeng;YANG Mingtai;FAN Yunfei;XIA Haodong(School of Civil Engineering,Hunan City University,Yiyang 413000,Hunan,China;Hunan Engineering Research Center of Structural Safety and Disaster Prevention for Urban Underground Infrastructure,Yiyang 413000,Hunan,China;Nuclear Resources Geological Survey,Non-ferrous Metals and Nuclear Industry Geological Exploration Bureau of Guizhou,Guiyang 550005,Guizhou,China;Cores and Samples Center of Natural Resources,Yanjiao 065201,Hebei,China)

机构地区：[1]湖南城市学院土木工程学院,湖南益阳413000 [2]城市地下基础设施结构安全与防灾湖南省工程研究中心,湖南益阳413000 [3]贵州省有色金属和核工业地质勘查局核资源地质调查院,贵州贵阳550005 [4]自然资源实物地质资料中心,河北燕郊065201

出　　处：《中国地质》2024年第2期650-662,共13页Geology in China

基　　金：“贵州省耕地质量地球化学调查评价”(黔耕调2017-03);湖南省自然科学基金省市联合基金项目(2022JJ50277)联合资助。

摘　　要：【研究目的】涟江大坝位于贵州省惠水县,为查明该地区土壤硒分布特征,系统采集了表层土壤样品337件,成土母岩样品4件,土壤剖面样品16件,分析测定Se、养分元素和As、Cd、Cr、Cu、Hg、Ni、Pb、Zn重金属元素等含量。【研究方法】通过表层土壤、成土母岩、土壤剖面样品中Se、养分元素、重金属元素含量对比分析,结合相关性分析方法,对该区土壤Se分布特征进行评估。【研究结果】区内土壤偏酸性,土壤中Se元素含量范围为0.19~3.65 mg/kg;土壤中养分元素P、B和SOM含量高;区内不同成土母质表层土壤Se平均值具有上石炭统灰岩>中二叠统茅口组灰岩>中二叠统栖霞组灰岩>上白垩统茅台组砂岩>中三叠统罗楼组灰岩>中三叠统边阳组碎屑岩的变化规律;区内土壤剖面中Se含量随深度加深而降低。【结论】区内富硒土壤丰富,主要为中等和高级,富硒土壤面积为42.94 km2;土壤中Se与SOM呈显著正相关关系,Se与K_(2)O、pH呈显著负相关关系。[Objective]Lianjiang Dam is located in Huishui County of Guizhou Province.To find out the Se distribution features of soil in Lianjiang Dam,337 surface soil samples,4 soil mother rock samples and 16 soil profile samples were collected,and the contents of Se,nutrient elements and heavy metal elements such as As、Cd、Cr、Cu、Hg、Ni、Pb、Zn were analyzed and determined.[Methods]The contents of Se,nutrient elements and heavy metal elements in the samples from surface soil,soil mother rock and soil profile were compared and the Se distributions features of soil were evaluated based on correlative analysis method.[Results]It showed that the soil in this area were acidic with the contents of Se in the soil from 0.19 to 3.65 mg/kg.The contents of nutrient elements such as P,B and SOM in the soil were high.The average Se values of surface soil of different mother rocks in this area appeared the transformation law:Upper Carboniferous limestone>Middle Permian Maokou Formation limestone>Middle Permian Qixia Formation limestone>Upper Cretaceous Maotai Formation sandstone>Middle Triassic Luolou Formation limestone>Middle Triassic Bianyang Formation clastic rocks.The Se contents of soil profile in this area decreased with the depth deepening.[Conclusion]The Selenium-rich soil is abundant in this area,mainly of medium and high.The area of selenium-rich soil is about 42.94 km2.There is a significant positive correlation between Se and SOM,while a significant negative correlation between Se and K_(2)O,and pH in soil.

关 键 词：硒 土壤 生态环境 茅口组灰岩P2m 茅台组砂岩K2m 环境地质调查 涟江大坝 惠水 贵州省 

分 类 号：P595[天文地球—地球化学] S153.6[天文地球—地质学] X14[农业科学—土壤学]