干旱区生态环境知识资源中心(Arid): Identification on threshold and efficiency of rainfall replenishment to soil water in semi-arid loess hilly areas

Arid

	Identification on threshold and efficiency of rainfall replenishment to soil water in semi-arid loess hilly areas
	Yang Lei; Zhang Handan; Chen Liding
来源期刊	Science China. Earth Sciences
ISSN	1674-7313
出版年	2018
卷号	61 期号:3 页码:292-301
英文摘要	As one critical source of water for maintaining ecosystems in arid and semi-arid regions, rainfall replenishment to soil water can determine vegetation growth and ecosystem functions. However, the limited rainfall resources were often not used effectively in the semi-arid loess hilly areas due to random temporal and spatial distribution of rainfall and specific vegetation features. Thus, it is highly significant to determine the threshold and efficiency of rainfall replenishment to soil water under different vegetation types. The threshold and efficiency can offer scientific evidence for rehabilitating vegetation and improving efficiency of using rainfall resources. In this study, the efficiency and threshold of rainfall replenishment to soil water were determined under natural grassland, wheat, artificial grassland, sea buckthorn shrubland and Chinese pine forestland based on consecutive measurements. The results indicated that the lag-time, rate, efficiency of rainfall replenishment to soil water were closely related to vegetation type, with significant differences existing among different vegetation types. The lag-time for natural grassland in the soil horizon of 20 cm was the shortest one (26.4 h), followed by wheat (27.8 h), sea buckthorn (41.8 h), artificial grassland (50.0 h) and Chinese pine (81.8 h).The value of replenishment rate, followed the order of wheat (0.40 mm h~(-1))> natural grassland (0.30 mm h~(-1))> sea buckthorn (0.17 mm h~(-1))> artificial grassland (0.14 mm h~(-1))> Chinese pine (0.09 mm h~(-1)). As for the efficiency of rainfall replenishment to soil water, natural grassland was the most efficient one (35.1%), followed by wheat (29.2%), sea buckthorn (16.8%), artificial grassland (11.5%), Chinese pine (4.2%). At last, it was found that wheat had the lowest threshold (6.8 mm) of rainfall replenishment to soil water, which was followed by natural grassland (10.5 mm), sea buckthorn (20.5 mm), artificial grassland (22.6 mm) and Chinese pine (26.4 mm). These results implied that soil water in natural grassland was sensitive to rainfall and easily to be replenished, while soil water in Chinese pine was harder to be replenished by rainfall compared to other vegetation types.
英文关键词	Vegetation rehabilitation Soil water Lag-time of rainfall replenishment Efficiency of rainfall replenishment Threshold of rainfall replenishment
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6190158
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335919
作者单位	Yang Lei, Research Center for Eco-Environmental Sciences;;University of Chinese Academy of Sciences, State Key Laboratory of Urban and Regional Ecology;;, ;;, Beijing;;Beijing 100085;;100049.; Zhang Handan, Research Center for Eco-Environmental Sciences;;University of Chinese Academy of Sciences, State Key Laboratory of Urban and Regional Ecology;;, ;;, Beijing;;Beijing 100085;;100049.; Chen Liding, Research Center for Eco-Environmental Sciences;;University of Chinese Academy of Sciences, State Key Laboratory of Urban and Regional Ecology;;, ;;, Beijing;;Beijing 100085;;100049.
推荐引用方式 GB/T 7714	Yang Lei,Zhang Handan,Chen Liding. Identification on threshold and efficiency of rainfall replenishment to soil water in semi-arid loess hilly areas[J],2018,61(3):292-301.
APA	Yang Lei,Zhang Handan,&Chen Liding.(2018).Identification on threshold and efficiency of rainfall replenishment to soil water in semi-arid loess hilly areas.Science China. Earth Sciences,61(3),292-301.
MLA	Yang Lei,et al."Identification on threshold and efficiency of rainfall replenishment to soil water in semi-arid loess hilly areas".Science China. Earth Sciences 61.3(2018):292-301.