滇东南石灰土微量元素地化特征与环境质量评价  

Geochemical Characteristics and Environmental Quality of Microelements in Limestone Soil in Southeast Yunnan Province

作　　者：谢代兴[1] 杨杨[1] 苏春田[1] 孟小军[1] 

机构地区：[1]中国地质科学院岩溶地质研究所/国土资源部,广西壮族自治区岩溶动力学重点实验室,广西桂林541004

出　　处：《贵州农业科学》2014年第10期229-233,共5页Guizhou Agricultural Sciences

基　　金：中国地质调查局地质调查项目"西南典型岩溶流域水文地质及环境地质调查"(1212011220950)

摘　　要：为云贵高原南部岩溶峰丛山区的环境治理提供科学依据,以云南省广南县那洒至马街段岩溶区不同时代的石灰土为样体,采用实地调查、采样和检测的方法,对云贵高原南部岩溶峰丛山区石灰土微量元素的地化特征及环境质量进行分析评价。结果表明：石灰土在成土过程中微量元素以迁移聚集为主,迁移聚集因子占93.44%,迁移聚集量为母岩的1~27.5倍,最高达82.6倍;石灰土微量营养元素Ni、Zn、Mn和Cu等含量丰富,P、Co和S等含量呈贫乏至严重贫乏。除O1x、∈Ob地段外,其余地段石灰土区均已受到Cd、As和Ni等元素的复合型轻至重度超标污染,P综为1.05~9.86;成土过程中的自然迁移与聚集是微量元素超标的来源。The limestone soil samples with different age from karst area of Nasamajie town,Guangnan County,Yunnan were analyzed by field investigation,sample collection and determination,and then the geochemical characteristics and environmental quality of microelements in limestone soil in Southeast Yunnan were evaluated to provide the scientific basis for environmental management of karst mountainous area in Southeast Yunnan. The results showed that： 1 ） Microelements are mainly migration and aggregation during the soil-forming process of limestone soil,migration and aggregation factor accounts for 93.44%,and migration and aggregation amount is 1~27.5 time that of mother rock;2）The content of Ni,Zn,Mn and Cu is abundant but the content of P,Co and is poor and very poor.Except for O1xand ∈ Ob districts,the limestone soil of other districts is complexly polluted by Cd,As and Ni slightly and severely. P integration is 1.05~9.86.Natural migration and aggregation is the source of higher microelement content in limestone soils during the soil-forming process.

关 键 词：石灰土 微量元素 质量评价 环境污染 

分 类 号：S151.9[农业科学—土壤学] X825[农业科学—农业基础科学]