文献类型：期刊文献

中文题名：三江源区玉树县和玛多县土壤汞含量分布特征

英文题名：Distribution of Mercury in Soil of Yushu and Maduo in the Three Rivers Source Region

作者：冯玲[1];张威[2];修光利[1];高小红[2];李波[1];徐薇[1];黄众思[1]

机构：[1]华东理工大学资源与环境工程学院/国家环境保护化工过程环境风险评价与控制重点实验室,上海200237;[2]青海师范大学生命与地理科学学院/青藏高原环境与资源教育部重点实验室,青海西宁810008

年份：2014

卷号：30

期号：2

起止页码：262

中文期刊名：生态与农村环境学报

外文期刊名：Journal of Ecology and Rural Environment

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：青海省自然科学基金(2011-Z-903);国家自然科学基金(21277044);中央高校基本科研业务费专项资金(WB1113005)

语种：中文

中文关键词：土壤;汞;空间分布;玉树县;玛多县

外文关键词：soil; mercury; spatial distribution; Yushu County; Maduo County

摘要：2012年7至9月在长江、黄河和澜沧江的源头——三江源地区的玉树县和玛多县采集175个表层土壤样品,分析了2地土壤化学性质和汞含量,研究土壤pH值和土壤有机质(TOC)含量与汞含量之间的关系,并探讨三江源区土壤汞含量分布特征。结果表明,研究区域土壤pH均呈弱碱性,且TOC含量丰富;与玉树县相比,玛多县土壤碱性更强,但TOC含量偏低。研究区域土壤汞含量算术平均值为0.034 mg·kg-1,低于国家土壤平均背景值,但若与1990年青海全省平均土壤汞含量的背景值相比,研究区域土壤汞含量明显偏高。灰褐土汞含量明显高于其他4种土壤类型,但其他4种类型土壤汞含量平均值几乎无差异。空间分布特征显示,玉树县表层土壤汞含量高于玛多县,这与两县的城镇发展成熟度和产业结构不同有关;土壤汞含量较高的区域主要集中在人口密集的城镇或交通枢纽旁。三江源区土壤汞含量与pH值之间存在相关性,与TOC含量之间呈显著正相关(r=0.605,n=90,P<0.05);与玉树县相比,土壤pH值较高、TOC含量较低的玛多县汞含量偏低,具体原因尚需进一步深入研究,以持续观测该地区土壤环境质量的变化。
A total of 175 soil samples were collected from surface soil layers at Yushu and Maduo in the three riverssource region （Yangtz River, Yellow River and Lancang River） from July to September in 2012 for analysis of the chemi-cal properties and Hg contents. On such a basis, relationships of Hg content with soil pH and total organic carbon （TOC）were investigated, and distribution characteristics of mercury in the soil of Yushu and Maduo were discussed. Results showthat the soil in the studied area tended to be slightly alkaline and rich in TOC. The soil in Maduo is higher in pH, butslightly lower in TOC than the soil in Yushu. The arithmetic average of mercury contents in the soil of the studied area was0. 034 mg·kg-1, which was lower than the average background value of the country, but obviously higher than the averagebackground value of Qinghai Province in 1990. Soil Hg content in the studied area was obviously on the high side, andmuch higher in gray-cinnamon soil than in the other four types of soils, which differed very slightly in average Hg content.The spatial distribution of Hg contents demonstrates that Hg content in the surface soil in Yushu was much higher than inMaduo, which is related to degree of urbanization and industrial structure of the two areas. High soil Hg content was foundmainly in the areas with dense population and busy traffic. Correlation was found between Hg content and pH, while signif-icantly positive relationship was observed between Hg content and TOC （r = 0. 605, n = 90, P〈0. 05）. Compared withYushu, Maduo, relatively higher in pH and lower in TOC, was lower in soil Hg content, of which the specific cause needsto be further studied through continuous observation of changes in soil environmental quality in the area.