新疆若羌县农用地表层土壤硒氟碘地球化学特征  

Geochemical characteristics of selenium,fluorine,iodine in surface soil of the agricultural land in Ruoqiang County,Xinjiang

作　　者：马常莲 周金龙[1,2,3] 曾妍妍 任贵兵[1,2,3] 王松涛 MA Chang-Lian;ZHOU Jin-Long;ZENG Yan-Yan;REN Gui-Bing;WANG Song-Tao(College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Hydrology and Water Resources Engineering Research Center,Urumqi 830052,China;Xinjiang Key Laboratory of Hydraulic Engineering Security and Water Disasters Prevention,Urumqi 830052,China;No.2 Hydrogeology and Engineering Geology Party of Xinjiang Bureau of Geology and Mineral Resources Exploration and Development,Changji 831100,China)

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]新疆水文水资源工程技术研究中心,新疆乌鲁木齐830052 [3]新疆水利工程安全与水灾害防治重点实验室,新疆乌鲁木齐830052 [4]新疆维吾尔自治区地质矿产勘查开发局第二水文工程地质大队,新疆昌吉831100

出　　处：《物探与化探》2022年第6期1573-1580,共8页Geophysical and Geochemical Exploration

基　　金：中央返还两权款资金项目“新疆和田—若羌绿洲带1∶25万土地质量地球化学调查”(S15-1-LQ)。

摘　　要：以新疆若羌县农用地表层土壤为研究对象,分析测定了2016年采集的142件表层土壤样品硒(Se)、氟(F)、碘(I)、Al_(2)O_(3)、SiO_(2)组分含量及有机碳(OrgC)、全氮(N)、pH等理化指标,据此重点探讨了研究区土壤中生命元素Se、F、I含量及其分布和影响因素,分析了不同成土母质、土壤类型中Se、F、I的含量特征。结果表明,研究区土壤呈碱性—强碱性,Se、F、I含量平均值分别为0.23×10^(-6)、645×10^(-6)和1.06×10^(-6),其中Se、I含量低于全国表层土壤背景值,F含量远高于全国表层土壤背景值。Se、F、I三者相互呈正相关,且均与全氮(N)呈显著正相关,Se与SiO_(2)呈负相关,I与Al_(2)O_(3)呈正相关;母质类型和土壤类型是影响Se、F、I含量及其分布和地球化学特征的重要因素。对比不同成土母质区土壤元素含量,洪积物区土壤中Se、F、I含量较高,而在冲积洪积物区土壤中含量最低。对比不同土壤类型中元素含量,灌淤土中Se、F、I含量均较高,林灌草地土中Se含量最高而F、I含量最低。This study investigated the surface soil of the agricultural land in Ruoqiang County,Xinjiang.Based on 142 surface soil samples collected in 2016,this study analyzed the selenium(Se),fluorine(F),iodine(I),Al_(2)O_(3),and SiO_(2) contents and the physicochemical proxies such as soil organic carbon(OrgC),total nitrogen(N),and pH of the surface oil in the study area.Then,this study explored the contents and distribution of biological elements Se,F,and I in the study area,as well as their influencing factors.The results are as follows.The soil in the study area is alkaline to strongly alkaline,with average Se,F,and I contents of 0.23×10^(-6),645×10^(-6),and 1.06×10^(-6),respectively.The average contents of Se and I are lower than their national soil background values,while the average content of F is much higher than its national soil background value.The Se,F,and I contents are positively correlated with each other and all of them are significantly positively correlated with total N.The Se content is negatively correlated with the SiO_(2) content,while the I content is positively correlated with the Al_(2)O_(3) content.The contents,distribution,and geochemical characteristics of Se,F,and I are controlled by parent materials and soil types.Among different parent materials,the Se,F,and I contents are higher in the soil of diluvium areas but are the lowest in the soil of alluvium-diluvium areas.Among different types of soil,the contents of the three elements are high in the irrigation-silted soil,while the Se content is the highest and the F and I contents are the lowest in the forest-shrub-grassland soil.

关 键 词：硒 氟 碘 地球化学特征 若羌县 

分 类 号：P632[天文地球—地质矿产勘探]