Strong non-growing season N uptake by deciduous trees in a temperate forest: A N-15 isotopic experiment

doi:10.1111/1365-2745.13754

	Strong non-growing season N uptake by deciduous trees in a temperate forest: A N-15 isotopic experiment
	Ma, Linna ; Xu, Xiaofeng 1; Zhang, Chaoxue 2; Lv, Yixia 2; Liu, Guofang ; Zhang, Qibing; Feng, Jinchao 3; Wang, Renzhong2
	2021
发表期刊	JOURNAL OF ECOLOGY
ISSN	0022-0477
卷号	109 期号:11 页码:3752-3766
摘要	Nitrogen (N) is a critical element for vegetation growth and subsequent carbon (C) and nutrient cycling in terrestrial ecosystems. Plant N uptake, the only pathway for plants to directly obtain N from soils, is a bottleneck process for ecosystem C and N cycling. Ecological theories predict that deciduous trees remain dormant and do not take up N during winters as no growth occurs during this season. In this study, we adopted a N-15 isotopic experiment to trace N processes throughout the non-growing season in a temperate forest in northern China. The N-15-labelled inorganic N (NH4+ and NO3-) and (CN)-C-13-N-15-labelled organic N (glycine and tyrosine; equivalent to 150 mg N-15/m(2)) were applied to soils at mid-fall, and the N-15 recovery in various components of dominant evergreen and deciduous species was analysed. We found that soil N transformation remained active in the winter and microbial N immobilization reached its peak in late winter. Surprisingly, deciduous species maintained a high N uptake that was comparable with the evergreen species throughout the non-growing season. Perennial herbs did not take up N until the next spring. All plant species acquired inorganic N and simple amino acids, while only the tree species utilized complex amino acids. Throughout the non-growing season, evergreen and deciduous trees showed higher uptake rates for NH4+ and glycine than NO3- and tyrosine, while deciduous shrubs and herbs showed a stronger preference for NO3- over other N forms. Synthesis. The finding that deciduous trees have strong N uptake in the non-growing season challenges the conventional viewpoint that deciduous trees remain dormant during non-growing seasons. This mechanism might supplement the algorithm in the model representation of N-limited temperate forest ecosystems.
关键词	N-15 N cycle non-growing season plant N uptake plant-soil feedback temperate forest
学科领域	Plant Sciences ; Ecology
DOI	10.1111/1365-2745.13754
收录类别	SCI
语种	英语
WOS关键词	FREEZE-THAW CYCLES ; ARBUSCULAR MYCORRHIZAL FUNGI ; SOIL MICROBIAL BIOMASS ; NITROGEN UPTAKE ; ACQUISITION STRATEGIES ; NUTRIENT-UPTAKE ; WINTER ; DYNAMICS ; SNOW ; RESPIRATION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000690670300001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2745
资助机构	National Key Research and Development Program of China [2016YFC0500501] ; National Natural Science Foundation of China [32071602] ; Basal Research Fund of Central Public Welfare Scientific Institution [CAFYBB2016QA021] ; Beijing Forest Experimental Station of the Institute of Botany ; Chinese Academy of Sciences ; San Diego State University
作者邮箱	maln@ibcas.ac.cn ; wangrz@ibcas.ac.cn
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/26438
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.San Diego State Univ, Dept Biol, San Diego, CA 92182 USA 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Forestry, Inst Desertificat Studies, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Ma, Linna,Xu, Xiaofeng,Zhang, Chaoxue,et al. Strong non-growing season N uptake by deciduous trees in a temperate forest: A N-15 isotopic experiment[J]. JOURNAL OF ECOLOGY,2021,109(11):3752-3766.
APA	Ma, Linna.,Xu, Xiaofeng.,Zhang, Chaoxue.,Lv, Yixia.,Liu, Guofang.,...&Wang, Renzhong.(2021).Strong non-growing season N uptake by deciduous trees in a temperate forest: A N-15 isotopic experiment.JOURNAL OF ECOLOGY,109(11),3752-3766.
MLA	Ma, Linna,et al."Strong non-growing season N uptake by deciduous trees in a temperate forest: A N-15 isotopic experiment".JOURNAL OF ECOLOGY 109.11(2021):3752-3766.

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