Arid
DOI10.1016/j.jaridenv.2015.07.002
Leaf nitrogen is closely coupled to phenophases in a desert shrub ecosystem in China
Chen, Zhi-Hao1; Zha, Tianshan1; Jia, Xin1; Wu, Yajuan1; Wu, Bin1; Zhang, Yuqing1; Guo, JianBin1; Qin, ShuGao1; Chen, Guopeng2; Peltola, Heli3
通讯作者Zha, Tianshan
来源期刊JOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
EISSN1095-922X
出版年2015
卷号122页码:124-131
英文摘要

The understanding of the seasonal dynamics of leaf nitrogen (N) relative to leaf traits for desert shrub species is limited. We investigated the seasonal changes in leaf N, soil N, specific leaf area (SLA) and photosynthetic capacity (P-max) in relation to the phenology of Artemisia ordosica in a desert shrubland area in northern China during the growing season of year 2012. We found that the amount of leaf N per unit dry mass varied in different phenological phases, having higher values during the early leaf expansion and leaf coloration and early defoliation periods and lower values during the expanded leaf and flowering periods. P-max was positively related to leaf N from the late leaf expansion period to the flowering and bearing period. Photosynthetic nitrogen use efficiency (NUE) correlated with SLA during the growing period. However, similar relationships were not observed for the leaf expansion and defoliation periods. During the flowering and bearing period, leaf N content per unit dry mass remained relatively stable, although fluctuations occurred due to precipitation. Our findings could help with modelling the dynamics of plant-soil N coupling of desert shrub-land ecosystems under changing environment. (C) 2015 Elsevier Ltd. All rights reserved.


英文关键词Artemisia ordosica Arid and semi-arid region Phenology Photosynthetic capacity Specific leaf area Leaf nitrogen
类型Article
语种英语
国家Peoples R China ; Finland
收录类别SCI-E
WOS记录号WOS:000359170000014
WOS关键词GAS-EXCHANGE CHARACTERISTICS ; USE EFFICIENCY ; PHOTOSYNTHETIC CAPACITY ; PRECIPITATION GRADIENT ; SEASONAL-VARIATIONS ; CELL-WALLS ; WATER-USE ; PLANT ; RESPONSES ; AREA
WOS类目Ecology ; Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
来源机构北京林业大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/188364
作者单位1.Beijing Forestry Univ, Sch Soil & Water Conservat, Yanchi Res Stn, Beijing, Peoples R China;
2.Bailongjiang Forestry Management Bur Gansu Prov, Inst Forestry Sci, Gannan, Peoples R China;
3.Univ Eastern Finland, Sch Forest Sci, Fac Sci & Forestry, FI-80101 Joensuu, Finland
推荐引用方式
GB/T 7714
Chen, Zhi-Hao,Zha, Tianshan,Jia, Xin,et al. Leaf nitrogen is closely coupled to phenophases in a desert shrub ecosystem in China[J]. 北京林业大学,2015,122:124-131.
APA Chen, Zhi-Hao.,Zha, Tianshan.,Jia, Xin.,Wu, Yajuan.,Wu, Bin.,...&Peltola, Heli.(2015).Leaf nitrogen is closely coupled to phenophases in a desert shrub ecosystem in China.JOURNAL OF ARID ENVIRONMENTS,122,124-131.
MLA Chen, Zhi-Hao,et al."Leaf nitrogen is closely coupled to phenophases in a desert shrub ecosystem in China".JOURNAL OF ARID ENVIRONMENTS 122(2015):124-131.
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