干旱区生态环境知识资源中心(Arid): Water Supply Increases N Acquisition and N Resorption from Old Branches in the Leafless Shrub Calligonum caput-medusae at the Taklimakan Desert Margin

Arid

DOI	10.3390/w13223288
	Water Supply Increases N Acquisition and N Resorption from Old Branches in the Leafless Shrub Calligonum caput-medusae at the Taklimakan Desert Margin
	Huang, Caibian; Zeng, Fanjiang; Zhang, Bo; Xue, Jie; Zhang, Shaomin
通讯作者	Huang, CB (corresponding author), Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Key Lab Desert Plant Roots Ecol & Vegeta, Urumqi 830011, Peoples R China. ; Huang, CB (corresponding author), Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China. ; Huang, CB (corresponding author), Cele Natl Stn Observat & Res Desert Grassland Eco, Cele 848300, Peoples R China. ; Zhang, SM (corresponding author), Xinjiang Acad Agr Sci, Inst Nucl Technol & Biotechnol, Urumqi 830091, Peoples R China.
来源期刊	WATER
EISSN	2073-4441
出版年	2021
卷号	13 期号:22
英文摘要	Irrigation is the main strategy deployed to improve vegetation establishment, but the effects of increasing water availability on N use strategies in desert shrub species have received little attention. Pot experiments with drought-tolerant shrub Calligonum caput-medusae supplied with water at five field capacities in the range of 30-85% were conducted using local soil at the southern margin of the Taklimakan Desert. We examined the changes in plant biomass, soil N status, and plant N traits, and addressed the relationships between them in four- and seven-month-old saplings and mature shrubs after 28 months. Results showed that the growth of C. caput-medusae was highly responsive to increased soil moisture supply, and strongly depleted the soil available inorganic N pools from 16.7 mg kg(-1) to an average of 1.9 mg kg(-1), although the total soil N pool increased in all treatments. Enhancement of biomass production by increasing water supply was closely linked to increasing total plant N pool, N use efficiency (NUE), N resorption efficiency (NRE), and proficiency (NRP) in four-month saplings, but that to total plant N pool, NRE, and NRP after 28 months. The well-watered plants had lower N concentrations in senesced branches compared to their counterparts experiencing the two lowest water inputs. The mature shrubs had higher NRE and NRP than saplings and the world mean levels, suggesting a higher N conservation. Structural equation models showed that NRE was largely controlled by senesced branch N concentrations, and indirectly affected by water supply, whereas NRP was mainly determined by water supply. Our results indicated that increasing water availability increased the total N uptake and N resorption from old branches to satisfy the N requirement of C. caput-medusae. The findings lay important groundwork for vegetation establishment in desert ecosystems.
英文关键词	Calligonum caput-medusae N resorption water addition soil inorganic N biomass
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000727852000001
WOS关键词	SOIL-NITROGEN AVAILABILITY ; NUTRIENT RESORPTION ; TERRESTRIAL ECOSYSTEMS ; LITTER DECOMPOSITION ; LIFE-SPAN ; GRASSLAND ; EFFICIENCY ; RESPONSES ; PATTERNS ; PLANT
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/373709
作者单位	[Huang, Caibian; Zeng, Fanjiang; Zhang, Bo; Xue, Jie] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Key Lab Desert Plant Roots Ecol & Vegeta, Urumqi 830011, Peoples R China; [Huang, Caibian; Zeng, Fanjiang; Zhang, Bo; Xue, Jie] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; [Huang, Caibian; Zeng, Fanjiang; Zhang, Bo; Xue, Jie] Cele Natl Stn Observat & Res Desert Grassland Eco, Cele 848300, Peoples R China; [Zhang, Shaomin] Xinjiang Acad Agr Sci, Inst Nucl Technol & Biotechnol, Urumqi 830091, Peoples R China
推荐引用方式 GB/T 7714	Huang, Caibian,Zeng, Fanjiang,Zhang, Bo,et al. Water Supply Increases N Acquisition and N Resorption from Old Branches in the Leafless Shrub Calligonum caput-medusae at the Taklimakan Desert Margin[J],2021,13(22).
APA	Huang, Caibian,Zeng, Fanjiang,Zhang, Bo,Xue, Jie,&Zhang, Shaomin.(2021).Water Supply Increases N Acquisition and N Resorption from Old Branches in the Leafless Shrub Calligonum caput-medusae at the Taklimakan Desert Margin.WATER,13(22).
MLA	Huang, Caibian,et al."Water Supply Increases N Acquisition and N Resorption from Old Branches in the Leafless Shrub Calligonum caput-medusae at the Taklimakan Desert Margin".WATER 13.22(2021).