干旱区生态环境知识资源中心(Arid): 干旱风沙区路域柠条灌丛林地土壤重金属分布及其与土壤分形维数的关系

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	干旱风沙区路域柠条灌丛林地土壤重金属分布及其与土壤分形维数的关系
其他题名	Distribution of Soil Heavy Metal Contents in Caragana korshinskii Shrub Habitats on the Proximity of Expressway and Its Relationship With Soil Fractal Dimension in Deserted Region
	郗伟华 1; 刘任涛 2; 赵娟 2; 刘佳楠 2
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2018
卷号	25 期号:6 页码:196-202
中文摘要	为了解干旱风沙区路域柠条林地土壤重金属的分布特征,探究其与不同粒径土壤颗粒和土壤分形维数的相关关系,为公路旁柠条林地土壤污染评价提供参考。以青银高速旁人工柠条林地为研究样地,调查了距高速公路0, 30,60,100,150,200m灌丛林下表层土壤重金属Pb,Cu,Cd,Zn含量,并对土壤重金属含量与土壤粒径分布及土壤分形维数进行了相关分析。结果表明:(1)0~200m,土壤重金属Pb,Cu,Cd,Zn变化曲线均呈单峰型,峰值分别出现在150,30,0,60m处。(2)随着距高速公路距离的增加,土壤黏粒含量呈上升趋势,而极细砂粒呈下降趋势;土壤分形维数呈缓慢上升趋势。(3)相关分析显示,土壤Cd和Zn在土壤黏粒中存在明显富集作用,而土壤Pb和Cu在各粒径颗粒中均无富集作用。土壤Pb,Cu,Cd,Zn与土壤分形维数间均未表现出相关性(p>0.05),而土壤黏粒(r= 0.71,p<0.05)和极细砂粒(r=0.73,p<0.05)与土壤分形维数间均表现出线性相关关系。研究表明,干旱风沙区路域柠条灌丛林不同种类土壤重金属空间分布变化较大,且存在阈值。土壤粒径较小的黏粒更容易吸附重金属,其分布特点对路域土壤重金属扩散范围的研究有重要的参考意义。并且,土壤分形维数变化能够反映该区土壤理化性状的变化特征,可以将其作为路域土壤结构、土壤退化恢复程度的一个定量指标。
英文摘要	In order to understand the distributions of heavy metals in Caragana korshinskii shrub habitats nearby expressway in deserted region,an investigation on soil heavy metal content and its relationship with different size of particles and fractal dimension of soil particles at the distances of 0,30m,60m,100m,150 m and 200maway from expressway,respectively,was carried.It was showed that:(1)there was asingle peak,type for soil Pb,Cu,Cd,and Zn contents spatially ranging from 0mto 200maway from expressway, with the peaks at the distances of 150m,30m,0m,60m,respectively;(2)with the increase of the distance from the expressway,soil clay contents increased,while soil fine sand contents decreased;the soil fractal dimension was found to present the slowly increasing trend;(3)the correlation analysis showed that there was a significant enrichment of soil Cd and Zn in clay,whereas there was no enrichment of soil Pb and Cu regarding in the particle sizes;there was no correlation between soil Pb,Cu,Cd,Zn and soil fractal dimension,while there was a linear correlation between soil clay,fine sand and soil fractal dimension,suggesting that there was remarkable changes of soil heavy metal contents on the proximity of expressway in shrub soil habitats.There was a strong accumulation of soil metals in clay fraction,which had the implications on diffusion range of soil heavy metal nearby expressway;in addition,the change of soil fractal dimension could characterize the soil physical and chemical properties in this deserted region.
中文关键词	干旱风沙区 ; 高速公路 ; 土壤重金属 ; 分形维数 ; 柠条林地
英文关键词	arid aeolian sand region expressway soil heavy metal fractal dimension Caragana korshinskii plantation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6341450
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238364
作者单位	1.宁夏大学;;山西师范大学生命科学学院, 西北土地退化与生态恢复国家重点实验室培育基地;;, 银川;;临汾, ;;山西 750021;;041000; 2.山西师范大学生命科学学院, 临汾, 山西 041000, 中国
推荐引用方式 GB/T 7714	郗伟华,刘任涛,赵娟,等. 干旱风沙区路域柠条灌丛林地土壤重金属分布及其与土壤分形维数的关系[J]. 宁夏大学,2018,25(6):196-202.
APA	郗伟华,刘任涛,赵娟,&刘佳楠.(2018).干旱风沙区路域柠条灌丛林地土壤重金属分布及其与土壤分形维数的关系.水土保持研究,25(6),196-202.
MLA	郗伟华,et al."干旱风沙区路域柠条灌丛林地土壤重金属分布及其与土壤分形维数的关系".水土保持研究 25.6(2018):196-202.