干旱区生态环境知识资源中心(Arid): Characteristics of Caragana korshinskii and Hippophae rhamnoides stemflow and their significance in soil moisture enhancement in Loess Plateau, China

Arid

	Characteristics of Caragana korshinskii and Hippophae rhamnoides stemflow and their significance in soil moisture enhancement in Loess Plateau, China
	Jian Shengqi; Zhao Chuanyan; Fang Shumin; Yu Kai
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2014
卷号	6 期号:1 页码:105-116
英文摘要	Stemflow of xerophytic shrubs represents a significant component of water replenishment to the soil-root system and influences water utilization of plant roots at the stand scale, especially in water-scarce semi-arid ecosystems. The stemflow of two semi-arid shrubs (Caragana korshinskii and Hippophae rhamnoides) and its effect on soil moisture enhancement were evaluated during the growing season of 2011 in the semi-arid loess region of China. The results indicated that stemflow averaged 12.3%and 8.4%of the bulk precipitation for C. korshinskii and H. rhamnoides, respectively. Individual stemflow increased in a linear function with increasing rain-fall depth. The relationship between funneling ratios and rainfall suggested that there existed a rainfall depth threshold of 11 mm for both C. korshinskii and H. rhamnoides. Averaged funneling ratios were 156.657.1 and 49.530.8 for C. korshinskii and H. rhamnoides, respectively, indicating that the canopy architecture of the two shrubs was an effective funnel to channel stemflow to the root area, and C. korshinskii showed a greater potential to use stemflow water in the semi-arid conditions. For individual rainfall events, the wetting front depths were ap-proximately 2 times deeper in the rooting zone around the stems than in the bare area outside canopy for both C. korshinskii and H. rhamnoides. Correspondingly, soil water content was also significantly higher in the root area around the shrub stem than in the area outside the shrub canopy. This confirms that shrub stemflow conserved in the deep soil layers may be an available moisture source for plant growth under semi-arid conditions.
英文关键词	precipitation stemflow funneling ratio rainfal intensity Anjiapo catchment
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	General & Internal Medicine
CSCD记录号	CSCD:5048395
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335317
作者单位	Jian Shengqi, School of Life Sciences, Lanzhou University, State Key Laboratory of Grassland and Agro-Ecosystems, Lanzhou, Gansu 730000, China.; Zhao Chuanyan, School of Life Sciences, Lanzhou University, State Key Laboratory of Grassland and Agro-Ecosystems, Lanzhou, Gansu 730000, China.; Fang Shumin, School of Life Sciences, Lanzhou University, State Key Laboratory of Grassland and Agro-Ecosystems, Lanzhou, Gansu 730000, China.; Yu Kai, Lanzhou University, Ministry of Education Key Laboratory of Western China Environmental Systems, Lanzhou, Gansu 730000, China.
推荐引用方式 GB/T 7714	Jian Shengqi,Zhao Chuanyan,Fang Shumin,et al. Characteristics of Caragana korshinskii and Hippophae rhamnoides stemflow and their significance in soil moisture enhancement in Loess Plateau, China[J],2014,6(1):105-116.
APA	Jian Shengqi,Zhao Chuanyan,Fang Shumin,&Yu Kai.(2014).Characteristics of Caragana korshinskii and Hippophae rhamnoides stemflow and their significance in soil moisture enhancement in Loess Plateau, China.Journal of Arid Land,6(1),105-116.
MLA	Jian Shengqi,et al."Characteristics of Caragana korshinskii and Hippophae rhamnoides stemflow and their significance in soil moisture enhancement in Loess Plateau, China".Journal of Arid Land 6.1(2014):105-116.