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

文献类型：期刊论文

作者Ma, Linna; Xu, Xiaofeng4; Zhang, Chaoxue1; Lv, Yixia1; Liu, Guofang; Zhang, Qibing; Feng, Jinchao2; Wang, Renzhong1
刊名JOURNAL OF ECOLOGY
出版日期2021
卷号109期号:11页码:3752-3766
关键词N-15 N cycle non-growing season plant N uptake plant-soil feedback temperate forest
ISSN号0022-0477
DOI10.1111/1365-2745.13754
文献子类Article
英文摘要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.
学科主题Plant Sciences ; Ecology
出版地HOBOKEN
电子版国际标准刊号1365-2745
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)
语种英语
WOS记录号WOS:000690670300001
出版者WILEY
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
源URL[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.San Diego State Univ, Dept Biol, San Diego, CA 92182 USA
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Chinese Acad Forestry, Inst Desertificat Studies, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 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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来源：植物研究所

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