干旱区生态环境知识资源中心(Arid): Soil water availability threshold indicator was determined by using plant physiological responses under drought conditions

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DOI	10.1016/j.ecolind.2020.106740
	Soil water availability threshold indicator was determined by using plant physiological responses under drought conditions
	Huang, Ze; Liu, Yu; Tian, Fu-Ping; Wu, Gao-Lin
通讯作者	Wu, GL
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2020
卷号	118
英文摘要	Soil water shortage is a critical limiting factor that threaten the growth of vegetation and their sustainability in semi-arid areas. Grasses directly respond to the soil water availability (SWA), and the soil water shortage degree can be studied through plant physiological response thresholds under soil drought stress. In this study, the lower-and-optimal limitation of SWA was evaluated with pots along the soil water gradient by quantifying plant gas exchange parameters. These parameters showed a strong cubic relationship with the relative soil water content (RWC) in four forage species. The lower limitation of RWC was obtained for Onobrychis viciifolia (4.0%-20.2%), followed by Astragalus adsurgens (15.5%-25.5%), Elymus nutans (16.1%-27.2%), and Lolium multiflorum (24.6%-35.8%). The average RWC was of 74.83%, and the water saturation point of water use efficiency (WSPWUE) showed a similar critical scope in the four species: Onobrychis viciifolia (71.2%-82.8%), Astragalus adsurgens (72.1%-84.2%), Elymus nutans (79.3%-85.1%), and Lolium multiflorum (76.7%-85.6%). The highest productivity with the highest availability of water (HPHAW) for Onobrychis viciifolia, Astragalus adsurgens, Elymus nutans and Lolium multiflorum was of 71.2%-82.8%, 72.1%-84.2%, 79.3%-85.1% and 76.7%-85.6%, respectively. The lower limitation of RWC, the maximum water use efficiency (WUEmax) and HPHAW in legumes were lower than those values obtained in gramineae, suggesting that legumes were more susceptible to soil drought stress. We concluded that plant gas exchange parameters acted as indicators for SWA under drought conditions, and represented a valuable tool for identifying SWA threshold response in environmental changes.
英文关键词	Gas exchange parameters Drought stress RWC WUE HPHAW
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000578967500037
WOS关键词	TRANSPIRATION RESPONSE ; ENVIRONMENTAL-FACTORS ; STOMATAL CONDUCTANCE ; GAS-EXCHANGE ; PHOTOSYNTHESIS ; STRESS ; EFFICIENCY ; LEAF ; ASSIMILATION ; IMPACT
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326815
作者单位	[Huang, Ze; Liu, Yu; Wu, Gao-Lin] Northwest A&F Univ, Coll Nat Resources & Environm, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; [Huang, Ze; Liu, Yu; Wu, Gao-Lin] Chinese Acad Sci, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China; [Huang, Ze; Liu, Yu; Wu, Gao-Lin] Minist Water Resource, Yangling 712100, Shaanxi, Peoples R China; [Tian, Fu-Ping] Chinese Acad Agr Sci, Minist Agr Ecol Syst Loess Plateau Area, Lanzhou Inst Husb & Pharmaceut Sci, Lanzhou Sci Observat & Expt Field Stn, Lanzhou 730050, Gansu, Peoples R China; [Wu, Gao-Lin] CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
推荐引用方式 GB/T 7714	Huang, Ze,Liu, Yu,Tian, Fu-Ping,et al. Soil water availability threshold indicator was determined by using plant physiological responses under drought conditions[J]. 西北农林科技大学,2020,118.
APA	Huang, Ze,Liu, Yu,Tian, Fu-Ping,&Wu, Gao-Lin.(2020).Soil water availability threshold indicator was determined by using plant physiological responses under drought conditions.ECOLOGICAL INDICATORS,118.
MLA	Huang, Ze,et al."Soil water availability threshold indicator was determined by using plant physiological responses under drought conditions".ECOLOGICAL INDICATORS 118(2020).