Effects of water stress on growth, dry matter allocation and water-use efficiency of a leguminous species, Sophora davidii

	Effects of water stress on growth, dry matter allocation and water-use efficiency of a leguminous species, Sophora davidii
	Li, FL ; Bao, WK ; Wu, N
刊名	AGROFORESTRY SYSTEMS
	2009
卷号	77 期号:3 页码:193_201
关键词	Drought stress Growth dynamic Sophora davidii Seedling establishment Water-use strategy
ISSN号	0167-4366
通讯作者	Wu, N, Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China.
中文摘要	The adaptation responses to different water conditions and the drought tolerance of Sophora davidii seedlings were assessed in a greenhouse experiment. Two-month-old seedlings were subjected to the following water supplies for 95 days: 100, 80, 60, 40 and 20% of field water capacity. The seedlings at 100% FC had the greatest productivity, height, basal diameter, branch number, leaf number and leaf area. Water supply < 80% FC was the threshold of drought-initiated negative effects on seedling growth, yield and physiological processes; these parameters were severely reduced at 20% FC, however, there was no plant death during the experiment. Moreover, water stress decreased leaf relative water content, specific leaf area, leaf area ratio, and water-use efficiency (WUE), whereas it increased the biomass allocation to roots, which resulted in a higher root:stem mass ratio under drought. The S. davidii seedlings tolerated drought by maintaining high leaf relative water content and by reducing branching and leaf expansion. However, low productivity and WUE at 20% FC suggested that seedlings did not produce high biomass under severe drought. Therefore, prior to introducing S. davidii in forestation efforts, a water supply > 40% FC is recommended for seedlings to maintain growth and productivity. These results provide insights into limitations and opportunities for establishment of S. davidii in arid regions.
学科主题	Agronomy; Forestry
收录类别	SCI
资助信息	Ph. D foundation in Western Light Talent Training Plan of Chinese Academy of Sciences [08C2041100]; National Natural Science Foundation of China [30570333]
语种	英语
公开日期	2011-07-08
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/22364]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Li, FL,Bao, WK,Wu, N. Effects of water stress on growth, dry matter allocation and water-use efficiency of a leguminous species, Sophora davidii[J]. AGROFORESTRY SYSTEMS,2009,77(3):193_201.
APA	Li, FL,Bao, WK,&Wu, N.(2009).Effects of water stress on growth, dry matter allocation and water-use efficiency of a leguminous species, Sophora davidii.AGROFORESTRY SYSTEMS,77(3),193_201.
MLA	Li, FL,et al."Effects of water stress on growth, dry matter allocation and water-use efficiency of a leguminous species, Sophora davidii".AGROFORESTRY SYSTEMS 77.3(2009):193_201.