干旱区生态环境知识资源中心(Arid): 河西走廊荒漠区土壤物理性质沿降水梯度的变化

Arid

	河西走廊荒漠区土壤物理性质沿降水梯度的变化
其他题名	Change of Soil Physical Properties with Precipitation Gradient in Desert Region of Hexi Corridor
	王蕙 1; 赵文智2 ; 武利玉 3
来源期刊	水土保持通报
ISSN	1000-288X
出版年	2010
卷号	30 期号:6 页码:46-51
中文摘要	土壤质量,土壤蓄水保肥能力和土壤养分吸收利用与土壤物理性质有密切联系.在甘肃省河西走廊民乐县至高台县自东向西的天然降水梯度上,选择荒漠区的7个研究点对土壤表层(020cm)和亚表层(2040cm)分别采集42个土壤样品,在野外采用张力入渗仪测定饱和导水率,室内采用常规方法对土壤容重,孔隙度,颗粒组成等项目进行了测定.结果表明,在360~100mm的降水梯度上,荒漠土壤粉粒和黏粒含量降低,砂粒含量增加;伴随着土壤的粗粒化,引起土体的风散和结构的破坏,使土壤容重增加,孔隙度降低,持水性能下降等一系列物理性质的恶化.土壤表层,亚表层饱和导水率Ksat和变异系数Cv分别为70.0%和86.3%,均是土壤表层和亚表层各物理性质中变异系数最高的
英文摘要	Soil quality, soil moisture and fertilizer preservation ability, and soil nutrient uptake ability are closely related to soil physical properties. In this study,42 soil samples were collected respectively in the 020 and 2040 cm soil layers from seven desert sampling plots along descending precipitation gradient in Hexi Corridor region(from Minle County to Gaotai County). Saturated soil hydraulic conductivity was measured with the tension infiltrometer in field, and bulk density, porosity, and soil particle composition were determined by general methods in lab. Results show that physical properties of the desert soils are gradually degraded. With precipitation decreasing from 360 to 100 mm, silt and clay contents are reduced and sand content is increased. Increase in soil particle size may definitely result in soil dispersion and structure destruction, further increase soil bulk density, and reduce soil porosity and water holding capacity. The variance coefficients of saturated soil hydraulic conductivity in the surface and subsurface layers are 70.0% and 86.3%, respectively, both of which are the highest among the Cv values of all the physical properties
中文关键词	荒漠土壤 ; 容重 ; 孔隙度 ; 砂粒 ; 饱和导水率
英文关键词	desert soil bulk density porosity sand saturated soil hydraulic conductivity
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:4100831
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225645
作者单位	1.甘肃农业大学林学院, 中国科学院内陆河流域生态水文重点实验室, 兰州, 甘肃 730070, 中国; 2.中国科学院寒区旱区环境与工程研究所中国生态系统研究网络临泽内陆河流域研究站, 中国科学院内陆河流域生态水文重点实验室, 兰州, 甘肃 730000, 中国; 3.甘肃农业大学林学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	王蕙,赵文智,武利玉. 河西走廊荒漠区土壤物理性质沿降水梯度的变化[J]. 甘肃农业大学,2010,30(6):46-51.
APA	王蕙,赵文智,&武利玉.(2010).河西走廊荒漠区土壤物理性质沿降水梯度的变化.水土保持通报,30(6),46-51.
MLA	王蕙,et al."河西走廊荒漠区土壤物理性质沿降水梯度的变化".水土保持通报 30.6(2010):46-51.