干旱区生态环境知识资源中心(Arid): 荒漠结皮对土壤水分状况的影响

Arid

	荒漠结皮对土壤水分状况的影响
其他题名	The Effects of Deseart Crust on the Character of Soil Water
	吕贻忠; 杨佩国
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2004
卷号	18 期号:2 页码:76-79
中文摘要	本研究针对鄂尔多斯沙地生物结皮进行调查，利用人工喷水模拟降雨分析结皮对土壤入渗性能的影响。研究表明：生物结皮能显著地降低土壤水分的入渗速率。在去掉结皮时，表层下5 cm处的土壤含水量在10分钟时即开始显著增加，而有结皮时，此处的含水量则在15分钟时才开始显著增加。利用圆盘入渗仪测定有结皮和无结皮条件下的土壤饱和导水率表明：固定沙丘间地有生物结皮的土壤饱和导水率范围是：29．10-82．21 mm／h；半固定沙丘有微弱结皮时饱和导水率为143．54-230．25；去掉结皮后土壤的饱和导水率可显著上升数倍，无结皮的流沙的饱和导水率最高。
英文摘要	Soil water is one of the most restrictive factors to the land productivity. This paper analysed the in?fluence of several different desert crusts on the sandland water infiltration on Erdos Plateau. It reveals the soil crust can extremely decrease the infiltration rate. When the soil crust is taken off, the soil water content at 5cm layer beneath the surface increased markablly after 10 min by spraying the water, but with the soil crust at the same depth the soil water content began to increase after 15 min. using Simpli?fied Disc Permeameter we determine the saturated hydraulic conductivity, the results show on the sta?tionary sand dune with crusts the soil saturated hydraulic conductivity range is about 29. 10~82. 21 mm/ h; one semi-stationary sand drift with thinner soil crust the soil saturated hydraulic conductivity range is about 143. 54~ - 230. 25 mm/h; when taken away the soil crust, the soil saturated hydraulic conduc?tivity is several times higher, and the active sand drift without any crust has the highest saturated hy?draulic conductivity.
中文关键词	荒漠结皮
英文关键词	Soil water
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:1642597
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205116
作者单位	中国农业大学资源与环境学院, 北京 100094, 中国
推荐引用方式 GB/T 7714	吕贻忠,杨佩国. 荒漠结皮对土壤水分状况的影响[J]. 中国农业大学,2004,18(2):76-79.
APA	吕贻忠,&杨佩国.(2004).荒漠结皮对土壤水分状况的影响.干旱区资源与环境,18(2),76-79.
MLA	吕贻忠,et al."荒漠结皮对土壤水分状况的影响".干旱区资源与环境 18.2(2004):76-79.