干旱区生态环境知识资源中心(Arid): 毛乌素沙地典型地形断面土壤水分动态

Arid

	毛乌素沙地典型地形断面土壤水分动态
其他题名	Dynamic Trend of Soil Moisture Content at a Typical Profile in the Mu Us Desert
	杨佩国; 李保国; 吕贻忠
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2004
卷号	21 期号:4 页码:333-337
中文摘要	基于毛乌素沙地的野外观测资料,对毛乌素沙地典型地形断面土壤水分动态进行分析.结果表明,土壤水分季节变化可划分为土壤水积聚期、消耗期和稳定期;根据土壤水分垂直变化可把土壤剖面划分为土壤水分易变层、利用层和调节层;沿着坡度减小的方向,各地形断面对应层次的土壤水分含量逐渐升高,丘间地土壤水分含量明显高于该断面上其余各点.
英文摘要	The study area is located in the ecotone between the arid grasslands and desert grasslands in the Mu Us Sandland on the Ordos Plateau. The ground surface here is loose, the vegetation coverage is low, the wind erosion, land desertification and soil erosion are serious, and the study area is one of the regions with the most serious desertification in China. The annual precipitation in the area varies in a range of 250~400 mm, and the precipitation during the period from July to September occupies 60% ~70% of the annual one. In the study area the annual evaporation is as high as 2 600 mm, the maximum and average wind speeds are 19. 5 m/s and 2. 9 m/s respectively, and the prevailing wind direction is N-NW. The soils are dominated by aeolian soil, brown soil, meadow soil and saline or alkaline soil. In this paper, the dynamic trend of soil moisture content at a typical section in the Mu Us Sandland is analyzed based on the field investigation. The results show that the seasonal change of soil moisture content can be divided into the soil moisture accumulation period, consumption period and stable period. According to the vertical change of soil moisture content, the easily change layer, utilization layer and regulation layer can be divided. The soil moisture content is increased with the reduction of slope. The soil moisture content in the lands between sand dunes is obviously higher than that at other measuring sites.
中文关键词	毛乌素沙地 ; 荒漠化 ; 土壤水分 ; 时空变异
英文关键词	the Mu Us desert desertification soil moisture content temporal and spatial variation
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:1689520
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/2XILL650/205084
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	杨佩国,李保国,吕贻忠. 毛乌素沙地典型地形断面土壤水分动态[J]. 中国农业大学,2004,21(4):333-337.
APA	杨佩国,李保国,&吕贻忠.(2004).毛乌素沙地典型地形断面土壤水分动态.干旱区研究,21(4),333-337.
MLA	杨佩国,et al."毛乌素沙地典型地形断面土壤水分动态".干旱区研究 21.4(2004):333-337.