干旱区生态环境知识资源中心(Arid): 毛乌素沙地东南缘不同类型沙丘土壤水分分布特征

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	毛乌素沙地东南缘不同类型沙丘土壤水分分布特征
其他题名	Distribution of Soil Moisture Content in Different Types of Sand Dunes in the Southeastern Marginal Zone of the Mu Us Sandy Land
	符超峰 1; 赵景波 2
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2011
卷号	28 期号:3 页码:377-383
中文摘要	通过对横山县境内毛乌素沙地东南缘的实地考察,根据植被类型和植被覆盖度,将沙丘分为裸露流动沙丘、灌木覆盖沙丘、乔木覆盖沙丘,分别在各类沙丘不同地貌部位实施4 m深度钻孔取样,并进行含水量测试和粒度分析,研究沙地土壤含水量变化。结果表明:对于垂直方向0～4 m深度的沙地、灌木和乔木覆盖沙丘平均含水量变化为:丘间洼地>迎风坡>背风坡,而裸露流动沙丘平均含水量变化为:丘间洼地>背风坡>迎风坡;不同类型沙丘在各地貌部位不同层段含水量变化差异明显,变化趋势不统一。沙丘的地貌部位相同,地表的植被类型和覆盖度差异是影响沙地土壤含水量的重要因素,测试结果显示,迎风坡含水量为:灌木覆盖沙丘>乔木覆盖沙丘>裸露流动沙丘;背风坡含水量为:灌木覆盖沙丘>裸露流动沙丘>乔木覆盖沙丘;丘间洼地含水量为:灌木覆盖沙丘>乔木覆盖沙丘>裸露流动沙丘。灌木覆盖沙丘土壤含水量变异系数最大,水分含量在不同层位波动较大,裸露流动沙丘和乔木覆盖沙丘含水量波动差异较小。沙丘上生长的灌木和乔木明显地改变了沙丘含水量的变化特征,灌木比乔木对沙丘含水量及其垂向变化的影响更显著。灌木对地表大气中的粉尘有较强的拦截能力,灌木沙丘平均的粉砂和黏土含量高,灌木的覆盖有利于沙地的土壤化进程和保持沙地水分,在沙地绿化过程中,应充分考虑灌木植物的作用。
英文摘要	The study area is located in the southeastern marginal zone of the Mu Us Sandy Land,and it is a semiarid climate area with annual precipitation of 394.7 mm.Based on the investigation in the study area in late-April 2009,the sand dunes were divided into bare migratory dunes,shrub-covered dunes and tree-covered dunes according to the vegetation types and vegetation coverage on the sand dune surface,and the samples of drilling holes of 4 m in depth at different topographic sites of the dunes were taken for analyzing the change of soil moisture content and soil granular properties of the sand dunes．The results are as follows:(1)Average soil moisture content at depth of 4 m was different from different dune types，that of the shrub-covered dunes and tree-covered dunes was in an order of dune intervale>windward slope>leeward slope，but that of the bare migratory sand dunes was in an order of dune intervale>leeward slope>windward slope．Furthermore，the variation of soil moisture content at different depth of each dune type was different，and that of shrub-covered dunes at different depth was more significant than that of the tree-covered dunes and bare migratory dunes;(2)Vegetation types and surface vegetation coverage affected the variation of soil moisture content of dunes at the same topographic positions of different dune types．Results of the test show that the soil moisture content on windward slope was in an order of shrub-covered dunes>tree-covered dunes>bare migratory dunes，it on leeward slope was in an order of shrub-covered dunes >bare migratory sand dunes>tree-covered dunes，and it at dune intervale was in an order of shrub-covered dunes>tree-covered dunes>bare migratory dunes;the variation coefficient of soil moisture content of shrub-covered dunes was higher than that of other dune types，the soil moisture content of shrub-covered dunes at different depth fluctuated more obviously compared with that of other dune types，and the shrubs and trees growing over the sand dunes affected obviously the change of soil moisture content of sand dunes;(3)Shrubs intercept strongly atmospheric dust．The average silt and clay content of the shrub-covered dunes was higher than that of other dune types，which reveals that the shrubs are beneficial to the loamification and soil moisture conservation of sand dunes． Therefore，it is valuable to plant shrubs for preventing and controlling desertification in the Mu Us Sandy Land．
中文关键词	沙丘类型 ; 沙丘水分 ; 土壤含水量 ; 粒度分析 ; 地貌部位 ; 毛乌素沙地 ; 横山 ; 陕西
英文关键词	sand dune type soil moisture content particle size analysis topographic position Mu Us Sandy Land Hengshan Shaanxi province
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4291047
来源机构	陕西师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226516
作者单位	1.陕西师范大学旅游与环境学院, 西安, 陕西 710054, 中国; 2.陕西师范大学旅游与环境学院, 西安, 陕西 710062, 中国
推荐引用方式 GB/T 7714	符超峰,赵景波. 毛乌素沙地东南缘不同类型沙丘土壤水分分布特征[J]. 陕西师范大学,2011,28(3):377-383.
APA	符超峰,&赵景波.(2011).毛乌素沙地东南缘不同类型沙丘土壤水分分布特征.干旱区研究,28(3),377-383.
MLA	符超峰,et al."毛乌素沙地东南缘不同类型沙丘土壤水分分布特征".干旱区研究 28.3(2011):377-383.