滇东南岩溶区土壤有效态微量元素丰度特征及其影响因素  

On the influential factors and the abundance features of karst soil trace elements in southeastern Yunnan

作　　者：苏春田[1,2] 王红梅[1] 谢代兴[2] 李水新[3] 潘晓东[2] 唐建生[2] 孟小军[2] 李兆林[2] 

机构地区：[1]中国地质大学环境学院,武汉430074 [2]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 [3]桂林理工大学环境科学与工程学院,广西桂林541004

出　　处：《安全与环境学报》2015年第3期301-304,共4页Journal of Safety and Environment

基　　金：西南典型岩溶流域水文地质及环境地质调查项目(1212011220950);乌蒙山区水文地质环境地质调查项目(12120113052500);西南岩溶地区1∶5万水文地质环境地质调查(12120114069001-01)

摘　　要：为了解滇东南岩溶区土壤有效态微量元素丰度特征及其影响因素,采用对角线取样法对研究区土壤进行采样并进行了测试分析。结果表明,不同地层土壤有效硼质量比由小到大为奥陶系、泥盆系、寒武系,有效铜质量比由小到大为寒武系、奥陶系、泥盆系,有效锌和有效铁质量比由小到大为寒武系、泥盆系、奥陶系。p H值、有机质是影响土壤有效态微量元素的重要因素,有效硼、有效铜、有效锌质量比与p H值呈正相关,有效铁质量比与p H值呈负相关;有效硼、有效铜质量比与有机质质量比呈极显著正相关(p<0.01),有效锌质量比与有机质质量比呈显著正相关(p<0.01),而有效铁质量比与有机质质量比相关性不明显。根据中科院微量元素组制定的标准,不同地层土壤有效硼、有效锌质量比级别为极低或低,有效铜质量比级别为中,有效铁质量比为高或极高。This paper attempts to make a study of the characteristic features of the available trace element abundance in the soils in southeast Yunnan and their influential factors by means of collecting and exploring the soil samples and analysis of the trace elements in the karst areas of the said region. In our work,we have measured the content of the available trace elements with ICP-OES methods. The results of our investigative research show that the soil enjoys characteristic features with the available trace elements in different strata,which can be stated in a descending order as follows： for the available boron,Cambrian Devonian Ordovician,whereas with the content of the available copper,Devonian Ordovician Cambrian,as to the content of the available zinc and the available ferrum,Ordovician Devonian Cambrian. At the same time,it indicates that Cambrian stratum contains1. 13 times available boron as much as that in Ordovician stratum,whereas Ordovician stratum contains 1. 90 times available zinc as much as that in Cambrian stratum. As to the Ordovician stratum,it contains 1. 37 times available ferrum as much as that in Cambrian one. In addition,p H value and the organic components are also the important influential factors in influencing the available trace element contents in the soil and p H value is moderately positively correlated with the available boron,copper,zinc contents,with the relevant coefficients of 0. 44,0. 38 and 0. 36.On the other hand,the available ferrum and p H value are also moderately negatively correlated with the coefficient of- 0. 41. In addition,there exists an extremely obvious correlation of the organic matter content with the available boron and copper contents,which stand with the relative coefficients of 0. 88 and0. 67. At the same time,a positive correlation has also been found in the available zinc content and the organic matter content,whose correlation coefficient is 0. 48. The relevant coefficient between the organic matter content and the available ferrum is-0. 05,though it is

关 键 词：环境学 微量元素 岩溶区 地质条件 有效态 

分 类 号：X53[环境科学与工程—环境工程] X142