贵州省金沙县耕地土壤硒含量特征及其影响因素分析  

Analysis on Soil Selenium Content Characteristics and Its Influencing Factors of Cultivated Land in Jinsha County,Guizhou Province

作　　者：麻杰磊 史宝平[1] 陈群[1] 李向平[1] 谢江涛[1] 祖正江 MA Jie-lei;SHI Bao-ping;CHEN Qun;LI Xiang-ping;XIE Jiang-tao;ZU Zheng-jiang(115 Geological Party,Guizhou Bureau of Geology&Mineral Exploration and Development,Qingzhen 551400,Guizhou,China)

机构地区：[1]贵州省地矿局115地质大队,贵州清镇551400

出　　处：《贵州地质》2020年第3期378-383,共6页Guizhou Geology

基　　金：贵州省金沙县耕地质量地球化学调查评价项目(黔地矿耕调2017-36)。

摘　　要：本文利用贵州省金沙县耕地质量地球化学调查评价项目成果,分析了耕地土壤硒含量特征及其影响因素,结果显示:研究区耕地土壤整体表现出富硒特征,土壤硒主要继承于母岩,在同一成土母岩环境下,硒与有机质含量呈显著正相关,与土壤质地关系表现为黏土>壤土>砂土,表明土壤中与有机质相关的硒占总硒的主要部分,硒可能赋存于腐殖质与黏土中。稻谷中硒的生物富集系数与其根系土中有机质含量呈显著负相关(R=-0.5,p<0.01),推测研究区水稻土中有机硒主要以胡敏酸硒形式存在,且占了土壤总硒含量的绝大部分。In this paper,according to the results of geochemical survey of cultivated soil in Jinsha county,the characteristics of selenium content and risk factors are analyzed.The results show that the cultivated soil in the study area is rich in selenium.Soil selenium mainly comes from parent rock.In the same parent rock environment,there was a significant positive correlation between soil selenium and organic matter.And the relationship with soil texture is clay>loam>sand.It shows that organic matter related selenium is the main part of total selenium in soil,and Selenium may hosted in humus and clay.By analyzing the selenium content of rice,we found that,there was a significant negative correlation between the bioconcentration factors(BCF)of Se in rice and the content of organic matter in its root soil(R=-0.5,P<0.01).It is speculated that the organoselenium in paddy soil may be mainly in the form of humic acid selenium,and it accounts the most of the total selenium content in the soil.

关 键 词：金沙县 耕地土壤 硒含量 有机质 成土母岩 

分 类 号：P632[天文地球—地质矿产勘探] S159[天文地球—地质学]