遵义市土壤硒分布及其影响因素研究  

Soil selenium distribution and its influencing factors in Zunyi city

作　　者：邓军[1] 师华定[2] 赵建 韩小斌 彭玉龙 刘京 马瑾[2] DENG Jun;SHI Hua-ding;ZHAO Jian;HAN Xiao-bin;PENG Yu-long;LIU Jing;MA Jin(Chongqing Vocational Institute of Engineering,Chongqing 402260;Chinese Research Academy of Environmental Sciences,Beijing 100012;Zunyi Branch Company of Guizhou Tobacco Company,Zunyi Guizhou 563000)

机构地区：[1]重庆工程职业技术学院,重庆402260 [2]中国环境科学研究院,北京100012 [3]贵州省烟草公司遵义市公司,贵州遵义563000

出　　处：《中国土壤与肥料》2019年第3期49-55,共7页Soil and Fertilizer Sciences in China

基　　金：中国烟草总公司贵州省公司项目“遵义烤烟质量安全生产监控体系建立与应用”[中烟黔科(2015)1号,合同号201506]

摘　　要：进行土壤硒分布及其影响因素研究,对掌握区域硒空间分布现状、区域农产品安全以及人体健康具有重要意义。在遵义市采集了701个表层土壤样本,分析了样品中的硒含量。利用GS+软件构建半变异函数模型,采用克里格法预测了遵义市土壤硒含量空间分布特征,并进一步探讨土壤pH值、全氮、有机质、海拔高度和成土母质等因素对硒含量及其空间分布的影响。结果表明:遵义市土壤硒含量变幅为0.10~2.90mg·kg^-1,平均值为0.56mg·kg^-1,总体上处于足硒和富硒土壤范畴,缺硒与少硒土壤较少,西北部和南部边缘存在明显的土壤富硒带,中部和东部地区土壤硒含量较低。土壤硒含量与pH值无相关关系,与土壤全氮、有机质和海拔高度呈显著正相关关系。此外,遵义市富硒岩层和广泛出露含硒量高的煤矿层可能也是影响土壤含硒量的主要因素。The study of soil selenium distribution and its influencing factors is of great significance for understanding the spatial distribution of selenium in certain regions,regional agricultural product safety and human health.The study collected 701 representative surface soil samples in Zunyi,and analyzed their selenium concentrations.GS+ software was used to build a semi variant function model,and the ordinary kriging method was used to predict the spatial distribution of selenium in the surface soil of Zunyi.In addition,the potential effects of soil pH,soil TN,soil organic matter,altitude and soil parent material on the concentration and distribution of soil selenium were also discussed.The results show that the total soil selenium content in Zunyi is ranged from 0.10 to 2.90 mg·kg^-1 with the mean value of 0.56 mg·kg^-1,which belongs to the category of enough selenium soil and rich selenium soil.There is a soil selenium rich zone in the northwestern and southern region of Zunyi.The content of soil total selenium has no correlation with pH,but has a significant positive correlation with soil TN,soil organic matter and altitude.In addition,the selenium rich strata and the widely exposed coal seam with high selenium content in Zunyi are also suspected to be the main factors which affect the the selenium concentrations in the soil.

关 键 词：遵义市 土壤 硒 变异特征 克里格法 空间分布 

分 类 号：S153.6[农业科学—土壤学]