干旱区生态环境知识资源中心(Arid): Root distribution of three co-occurring desert shrubs and their physiological response to precipitation

Arid

	Root distribution of three co-occurring desert shrubs and their physiological response to precipitation
	Xu, GuiQing; Li, Yan
通讯作者	Li, Y
来源期刊	SCIENCES IN COLD AND ARID REGIONS
ISSN	1674-3822
出版年	2009
卷号	1 期号:2 页码:120-127
英文摘要	Root distribution of three desert shrubs, Tamarix ramosissima Ledeb., Haloxylon ammodendron (C.A. Mey.) Bunge and Reaumuria soongorica (Pall.) Maxim. was investigated under co-occurring conditions using a method for excavating the whole root system. Assimilation shoot water potential and transpiration rates were monitored during the wet-dry cycle. Leaf-specific apparent hydraulic conductance and the index of water stress impact for the three species were calculated from shoot water potential and transpiration rate. The results showed that, along the soil profile, the root system of T. ramosissima mainly distributed at 50 to 310 cm interval, with an average total absorbing root-surface area of 30,249.2 cm(2) per plant; the root system of H. ammodendraom distributed at 0 to 250 cm interval with an average total absorbing root-surface area of 12,847.3 cm(2) per plant; the root system of R. soongorica distributed at 0-80 cm interval, with an average total absorbing root-surface area of 361.8 cm(2). The root distribution shows the following: T. ramosissima uses groundwater as its main water source; H. ammodendraom uses both groundwater and rainwater; and R. soongorica uses rainwater only. During the wet-dry cycle, the hydraulic parameters of T. ramosissima showed no responses to precipitation. R. soongorica responded most significantly, and the responses of H. ammodendraom were intermediate. In conclusion, the plant response to rain events is closely related to their root distribution and plant water-use strategy.
英文关键词	soil water content root distribution assimilation shoot water potential transpiration rate leaf-specific apparent hydraulic conductance
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000422252500003
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/329312
作者单位	[Xu, GuiQing; Li, Yan] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Fukang Stn Desert Ecol, Urumqi 830011, Peoples R China; [Xu, GuiQing] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China; [Li, Yan] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Urumqi, Peoples R China
推荐引用方式 GB/T 7714	Xu, GuiQing,Li, Yan. Root distribution of three co-occurring desert shrubs and their physiological response to precipitation[J]. 中国科学院新疆生态与地理研究所,2009,1(2):120-127.
APA	Xu, GuiQing,&Li, Yan.(2009).Root distribution of three co-occurring desert shrubs and their physiological response to precipitation.SCIENCES IN COLD AND ARID REGIONS,1(2),120-127.
MLA	Xu, GuiQing,et al."Root distribution of three co-occurring desert shrubs and their physiological response to precipitation".SCIENCES IN COLD AND ARID REGIONS 1.2(2009):120-127.