宝清县东部土壤硒含量特征及其与土壤性质的关系  

Characteristics of selenium content in soil of eastern Baoqing County and its relationship with soil properties

作　　者：王月平 张立 崔玉军 吕石佳 WANG Yue-Ping;ZHANG Li;CUI Yu-Jun;LYU Shi-Jia(Heilongjiang Institute of Geological Survey,Haerbin 150036,China)

机构地区：[1]黑龙江省地质调查研究总院

出　　处：《物探与化探》2019年第4期904-911,共8页Geophysical and Geochemical Exploration

基　　金：黑龙江省地质勘查专项(KCZX-YCCZ-2015031)

摘　　要：为了研究宝清县东部土壤硒的含量特征及其与土壤性质的关系,按照4个点/km2的采样密度在宝清县东部主要农耕区采集了17470个0~20cm深度的土壤样品,分析了土壤全硒含量、有机碳、pH等理化指标。结果表明:表层土壤硒含量在(0.01~1.17)×10^-6之间,平均含量0.326×10^-6;73.53%的土壤为足硒土壤,21.14%的土壤为富硒土壤,4.56%的土壤硒潜在不足,缺硒土壤只占0.77%,无硒中毒地区。不同成土母质硒的平均含量由高到低依次为残坡积物>冲积—洪积物>花岗岩>沉积岩>基性—中性火山岩;不同土壤类型硒的平均含量由高到低依次为白浆土>草甸土>黑土>沼泽土>暗棕壤>水稻土;不同土地利用方式硒的平均含量由高到低依次为水田>旱地>草地>建设用地>未利用地>林地。相关分析表明:土壤有机碳(TOC)和pH是影响研究区表层土壤硒含量的主要因素。In order to study the soil selenium content in the eastern part of Baoqing County and its relationship with soil properties,the authors collected 17 470 soil samples in the depth of 0~20 cm from the main agricultural areas in eastern Baoqing County according to the density of 4 points/km 2.Physical and chemical indicators such as selenium content,organic carbon and pH were analyzed.The results show that the selenium content in the topsoil is between 0.01×10^-6 and 1.17×10^-6,the average content is 0.326×10^-6,73.53%of the soil is selenium-sufficient,21.14%of the soil is selenium-abundant,and 4.56%of soil is of potential selenium-deficiency.Selenium-deficient soil only accounts for 0.77%,and there is no selenium poisoning area.The average content of selenium in different soil parent materials is arranged in decreasing order of alluvial deposits>alluvial deposits>granite>sedimentary rocks>basic-neutral volcanic rocks;the average content of selenium in different soil types in arranged in decreasing order of albic soil>meadow soil>black soil>marshy soil>dark brown soil>paddy soil;the average content of selenium in different land use is arranged in decreasing order of irrigated farmland>dry farmland>grassland>construction land>unused land>forest land.Correlation analysis shows that soil organic carbon(TOC)and pH are the main factors affecting the selenium content in the surface soil of the study area.

关 键 词：土壤硒 成土母质 土壤类型 有机碳 PH 宝清县 

分 类 号：P632[天文地球—地质矿产勘探]