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Restoration of degraded alpine grasslands alters plant-microbial competition for nitrogen

文献类型：期刊论文

作者Liu, Min1,2; Yu, Chengling1,2; Zhu, Tongbin3; Xu, Xingliang1; Wang, Yanfen4
刊名BIOLOGY AND FERTILITY OF SOILS
出版日期2022-10-01
卷号58期号:7页码:803-814
ISSN号0178-2762
关键词Qinghai-Tibetan Plateau Alpine meadow Alpine steppe In situ labeling Ecosystem biomass N uptake
DOI10.1007/s00374-022-01660-x
通讯作者Xu, Xingliang(xuxingl@hotmail.com) ; Wang, Yanfen(yfwang@ucas.ac.cn)
英文摘要Plant-microbial interaction for nitrogen (N) is important in plant growth, soil fertility, and function of grasslands. However, it remains unclear how plant-microbial competition for N changes after the restoration of degraded alpine grasslands. This study aimed to explore the dynamics of plant-microbial competition for N in restoration chronosequences (i.e., short-, medium-, and long-term) in an alpine meadow and an alpine steppe on the Qinghai-Tibetan Plateau. Two inorganic forms of N (ammonium (NH4+ ) and nitrate (NO3-)) and one organic N (glycine) were used for the in situ N-15 labeling experiments. The competition between microorganisms and plants (i.e., ratios) for N increased by 4.8 times after medium- than short-term restoration in the alpine meadow and remained stable after each restoration. Compared to short-term restoration, medium-term restoration increased the N uptake of microorganisms by 2.4 times in alpine meadow and 4.3 times in alpine steppe. Microorganisms and plants showed chemical niche differentiation between NH4+ and NO3- uptake in both alpine ecosystems after medium-term restoration, with microorganisms taking up more NH4+ but plants taking up more NO3-. Competition between microorganisms and plants decreased after long-term compared with medium-term restoration, maintaining the microbial to plant N uptake ratio > 1. Long-term restoration increased plant N uptake in the alpine meadow, while decreased the microbial N uptake in the alpine steppe. Neither microorganisms nor plants showed a preference for glycine, but glycine uptake by microorganisms was higher than plants after medium- and long-term restorations. These findings provide valuable insights into the restoration of degraded alpine grasslands from the perspective of plant-microbial competition for available N in soil, which may be useful for developing sustainable grassland management practices.
WOS关键词SOIL-NITROGEN ; ORGANIC NITROGEN ; INORGANIC NITROGEN ; MICROORGANISMS ; AVAILABILITY ; DIVERSITY ; PLATEAU ; CARBON ; DEGRADATION ; ACQUISITION
资助项目CAS Strategic Priority Research Programme[XDA20050104] ; Second Tibetan Plateau Scientific Expedition and Research (STEP)[2019QZKK0302] ; National Natural Science Foundation of China[41877089] ; National Natural Science Foundation of China[U20A2006] ; National Natural Science Foundation of China[31988102]
WOS研究方向Agriculture
语种英语
出版者SPRINGER
WOS记录号WOS:000849472800002
资助机构CAS Strategic Priority Research Programme ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/182396]  
专题中国科学院地理科学与资源研究所
通讯作者Xu, Xingliang; Wang, Yanfen
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, 11A Datun Rd, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China
3.Chinese Acad Geol Sci, Inst Karst Geol, Karst Dynam Lab, MLR & Guangxi, Guilin 541004, Peoples R China
4.Univ Chinese Acad Sci, Coll Life Sci, Beijing 101408, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Min,Yu, Chengling,Zhu, Tongbin,et al. Restoration of degraded alpine grasslands alters plant-microbial competition for nitrogen[J]. BIOLOGY AND FERTILITY OF SOILS,2022,58(7):803-814.
APA Liu, Min,Yu, Chengling,Zhu, Tongbin,Xu, Xingliang,&Wang, Yanfen.(2022).Restoration of degraded alpine grasslands alters plant-microbial competition for nitrogen.BIOLOGY AND FERTILITY OF SOILS,58(7),803-814.
MLA Liu, Min,et al."Restoration of degraded alpine grasslands alters plant-microbial competition for nitrogen".BIOLOGY AND FERTILITY OF SOILS 58.7(2022):803-814.

入库方式： OAI收割

来源：地理科学与资源研究所

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