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Plant functional groups shift their nitrogen uptake during restoration of degraded alpine grasslands

文献类型：期刊论文

作者Liu, Min1,5; Zhu, Tongbin2; Tian, Yuqiang3,4; Xu, Xingliang5; Wang, Yanfen6
刊名LAND DEGRADATION & DEVELOPMENT
出版日期2022-06-28
页码13
关键词alpine meadow alpine steppe niche partition nitrogen uptake plant functional group rhizosphere
ISSN号1085-3278
DOI10.1002/ldr.4363
通讯作者Xu, Xingliang(xuxl@igsnrr.ac.cn) ; Wang, Yanfen(yfwang@ucas.ac.cn)
英文摘要Alpine grasslands are undergoing severe degradation and are mainly restored through fencing. Numerous studies have explored the patterns, processes, and mechanisms of plant and soil during degradation, but few have been conducted on nitrogen (N) uptake by plant functional groups during restoration. An alpine meadow and an alpine steppe on the Tibetan Plateau were chosen to carry out in situ N-15 labelling experiments in the forms of NH4+, NO3-, and glycine during restoration. Short-, moderate-, and long-term restoration periods were explored, and plants were classified by functional groups into grasses, sedges, and forbs. Our results found biomass of grasses increased and that of sedges decreased with restoration in alpine meadow. In alpine steppe, forbs gradually became dominant in the community biomass by 58% during restoration. Long-term restoration increased NH4+ uptake by grasses in alpine meadow. The total N uptake rates by grasses increased, but by forbs decreased during restoration in alpine meadow. Restoration decreased the total N uptake rates of grasses and forbs in alpine steppe. Chemical niche in N uptake was discovered during long-term restoration in alpine meadow and during moderate-term restoration in alpine steppe. We conclude that restoration alters the biomass composition of grasses, sedges, and forbs in alpine grasslands and shifts N uptake partitions. Chemical niche in N uptake by different functional groups in grasslands during restoration can decrease the fierce competition for N. Our results provide a synthesis for plant N utilization from soil during restoration of degraded grasslands from the perspective of shifting N uptake strategies.
WOS关键词GRAZING EXCLUSION ; ORGANIC NITROGEN ; SOIL-QUALITY ; CARBON ; MICROORGANISMS ; DEGRADATION ; ECOSYSTEM ; NH4+ ; TEMPERATE ; DIVERSITY
资助项目CAS Strategic Priority Research Programme (A)[XDA20050104] ; National Natural Science Foundation of China[31988102] ; National Natural Science Foundation of China[41877089] ; National Natural Science Foundation of China[U20A2006] ; Chinese Academy of Sciences ; National Key R&D Program of China[2017YFA0604802]
WOS研究方向Environmental Sciences & Ecology ; Agriculture
语种英语
WOS记录号WOS:000817786400001
出版者WILEY
资助机构CAS Strategic Priority Research Programme (A) ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; National Key R&D Program of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/180924]  
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.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China
2.Chinese Acad Geol Sci, Karst Dynam Lab, MLR & Guangxi, Inst Karst Geol, Guilin 541004, Peoples R China
3.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China
4.Beijing Normal Univ, Fac Geog Sci, Sch Nat Resources, Beijing 100875, Peoples R China
5.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, 11A,Datun Rd, Beijing 100101, Peoples R China
6.Univ Chinese Acad Sci, Coll Life Sci, Beijing 101408, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Min,Zhu, Tongbin,Tian, Yuqiang,et al. Plant functional groups shift their nitrogen uptake during restoration of degraded alpine grasslands[J]. LAND DEGRADATION & DEVELOPMENT,2022:13.
APA Liu, Min,Zhu, Tongbin,Tian, Yuqiang,Xu, Xingliang,&Wang, Yanfen.(2022).Plant functional groups shift their nitrogen uptake during restoration of degraded alpine grasslands.LAND DEGRADATION & DEVELOPMENT,13.
MLA Liu, Min,et al."Plant functional groups shift their nitrogen uptake during restoration of degraded alpine grasslands".LAND DEGRADATION & DEVELOPMENT (2022):13.

入库方式： OAI收割

来源：地理科学与资源研究所

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