干旱区生态环境知识资源中心(Arid): 陕北黄土区陡坡坡面因子对土壤水分的影响

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	陕北黄土区陡坡坡面因子对土壤水分的影响
其他题名	Effects of farmland slope on soil moisture in semi-arid loess plateau of Northern Shaanxi
	李增尧; 赵兴凯; 朱清科
来源期刊	排灌机械工程学报
ISSN	1674-8530
出版年	2017
卷号	35 期号:9 页码:798-805
中文摘要	为加快黄土高原植被恢复和植被构建速度,在研究陕北黄土区吴起县坡度、坡向分布特征的前提下,分别选取阴坡、半阴坡、半阳坡、阳坡的陡坡,每个坡向选取4个坡度级( 35°,45°,55°, 65°),分别分析其0 ~ 100 cm土层深度的土壤水分并进行聚类分析.结果显示:研究区内坡度在35°以上陡坡占当地总面积的39.00%左右;且阴向坡面积52.65%多于阳向坡47.35%;研究区内0 ~ 100 cm土层深度的土壤含水量随着土层深度的增加呈现增加趋势,且趋势越来越平缓;坡度越大,土壤含水量的垂直变化越强烈,阴坡坡度与陡坡土壤含水量的相关性最为显著;坡向因子主要影响坡面整体水分状况,而对陡坡土壤水分垂直空间分布规律影响较小;坡度、坡向和成坡时间因子对坡面土壤含水量的影响主要集中在0 ~ 40 cm土层深度内,对较深层土壤含水量影响作用较小;系统聚类分析结果同样显示,土壤含水量较为活跃的层次主要集中在0 ~ 40 cm土层深度内,阳坡35°坡面活跃层可达90 cm左右.
英文摘要	In order to accelerate the speed of restoration and reconstruction of vegetation in the plateau, moisture in the loess soil must be addressed. At first,the characteristics of aspect and slope gradient are analyzed for the farmland in Wuqi County of Northern Shaanxi. Then,four slope aspects (sunny slope,shady slope,semi-sunny slope,semi-shady slope) are selected,and four slope gradients (35°,45°,55° and 65°) are chosen for each slope aspect,finally,the water content in 0 - 100 cm depth soil is measured and a hierarchical cluster analysis is performed on the data. It is demonstrated that the land with above 35° slope gradient takes up about 39.00% of the total land. The shady slope is in 52.65%,and the sunny slope is 47.35%. The soil water content rises with increasing soil depth and gets saturated eventually. The water content varies significantly along the depth with increasing slope gradient. The slope gradient with shady aspect has the most significant correlation with soil water content. The slope aspect mainly affects overall moisture distribution condition in a slope,and has a less effect on soil moisture distribution along the soil depth. The influences of slope gradient,slope aspect and time span of slope on soil water content are mainly concentrated in 0 - 40 cm depth; beyond this depth,however,the influences are limited. The same conclusion is achieved after the hierarchical cluster method is applied. The methods used in this paper also can be applied to analyze soil water content in other regions,especially arid and semi-arid regions. The results of this study provide a reference for understanding characteristics of soil water content in steep slopes of Northern Shaanxi and a guide for vegetation restoration.
中文关键词	陕北黄土区 ; 陡坡 ; 坡向 ; 土壤水分
英文关键词	loess region of Northern Shaanxi steep slope slope aspect soil water content
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURAL ENGINEERING ; AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6076970
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236366
作者单位	北京林业大学水土保持学院, 北京 100083, 中国
推荐引用方式 GB/T 7714	李增尧,赵兴凯,朱清科. 陕北黄土区陡坡坡面因子对土壤水分的影响[J]. 北京林业大学,2017,35(9):798-805.
APA	李增尧,赵兴凯,&朱清科.(2017).陕北黄土区陡坡坡面因子对土壤水分的影响.排灌机械工程学报,35(9),798-805.
MLA	李增尧,et al."陕北黄土区陡坡坡面因子对土壤水分的影响".排灌机械工程学报 35.9(2017):798-805.