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Warming Mitigates the Impacts of Degradation on Nitrogen Allocation between Soil Microbes and Plants in Alpine Meadow

文献类型：期刊论文

作者Pang, Zhe2; Wen, Guoqi3; Jiang, Lili1; Nie, Xiaowei1,4; Wang, Zongsong5; Pang, Rui6; Liu, Wenjing2; Chen, Meirong1; Zhao, Weiwai1; Tang, Li2
刊名AGRONOMY-BASEL
出版日期2024-03-01
卷号14期号:3页码:15
关键词organic N inorganic N N partitioning warming degradation Tibetan Plateau
DOI10.3390/agronomy14030508
通讯作者Jiang, Lili(lljiang@itpcas.ac.cn)
英文摘要In alpine meadows, plants and soil microbes typically engage in competition for nitrogen (N) under N-deficient conditions. However, the acquisition and distribution of N among soil microbes and plants under alpine meadow degradation and climate warming induced by global climate change are still uncharacterized. In this study, we isotope labeled inorganic (NH4+-15N, NO3--15N) and organic (glycine-15N) N in both degraded and non-degraded plots by using open-top chambers (OTC) to mimic increasing air temperatures. After 6 h, the 15N contents in soil microbes and plants were measured to investigate the effects of degradation and rising air temperature on N allocations in the ecosystems studied. Results showed that alpine meadow degradation significantly reduced soil microbial N accumulation by 52% compared to those in non-degraded plots. In non-degraded plots, warming significantly lowered the organic N levels of soil microbes by 49%, whereas in degraded ones, it reduced both NH4+-15N and NO3--15N recovery by 80% and 45% on average but increased glycine-15N recovery by 653%. Meanwhile, warming decreased the plant recovery of NH4+-15N and NO3--15N by 75% and 45% but increased the recovery of glycine-15N by 45% in non-degraded plots. Conversely, in degraded plots, warming markedly lowered NH4+-15N recovery by 40% but increased glycine-15N recovery by 114%. Warming mitigates the effects of alpine meadow degradation on nitrogen allocation among soil microbes and plants. In unwarmed plots, degradation significantly elevated the total 15N recovery ratio of soil microbes to plants by 60%. However, in warmed plots, the impact of degradation on this ratio was reduced. The responses of the 15N recovery ratio of soil microbes and plants to rising temperatures were closely related to alpine meadow quality. In non-degraded areas, warming enhanced the recovery ratio for NH4+-15N by 165% but reduced it for glycine-15N by 66%. Conversely, in degraded plots, warming decreased the recovery ratio for NH4+-15N by 66% but increased it for glycine-15N by 232%. This indicates that warming can increase carbon limitation for soil microbes in degraded alpine meadows, and the restoration of degraded alpine meadows should prioritize restoring carbon accumulation.
WOS关键词SEMIARID GRASSLAND ; ORGANIC-NITROGEN ; ELEVATED CO2 ; AMINO-ACIDS ; COMPETITION ; MICROORGANISMS ; TEMPERATURE ; MINERALIZATION ; FERTILIZATION ; DOMINANCE
资助项目Lhasa Key Science and Technology Plan
WOS研究方向Agriculture ; Plant Sciences
语种英语
WOS记录号WOS:001191556700001
出版者MDPI
资助机构Lhasa Key Science and Technology Plan
源URL[http://ir.igsnrr.ac.cn/handle/311030/204192]  
专题中国科学院地理科学与资源研究所
通讯作者Jiang, Lili
作者单位1.Chinese Acad Sci, Inst Tibetan Plateau Res, State Key Lab Tibetan Plateau Earth Syst Resources, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
3.Agr & Agrifood Canada, Ottawa Res & Dev Ctr, Ottawa, ON K1A 0C6, Canada
4.Sci Ctr Lingshan Forum Guangdong Prov, Guangzhou 511466, Peoples R China
5.Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources Res, Key Lab Agr Water Resources,Hebei Key Lab Soil Eco, Shijiazhuang 050021, Peoples R China
7.Fujian Agr & Forestry Univ, Forestry Coll, Fuzhou 350002, Peoples R China
8.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
9.Univ Chinese Acad Sci, Beijing Yanshan Earth Crit Zone Natl Res Stn, Beijing 101408, Peoples R China
推荐引用方式
GB/T 7714		 Pang, Zhe,Wen, Guoqi,Jiang, Lili,et al. Warming Mitigates the Impacts of Degradation on Nitrogen Allocation between Soil Microbes and Plants in Alpine Meadow[J]. AGRONOMY-BASEL,2024,14(3):15.
APA Pang, Zhe.,Wen, Guoqi.,Jiang, Lili.,Nie, Xiaowei.,Wang, Zongsong.,...&Wang, Yanfen.(2024).Warming Mitigates the Impacts of Degradation on Nitrogen Allocation between Soil Microbes and Plants in Alpine Meadow.AGRONOMY-BASEL,14(3),15.
MLA Pang, Zhe,et al."Warming Mitigates the Impacts of Degradation on Nitrogen Allocation between Soil Microbes and Plants in Alpine Meadow".AGRONOMY-BASEL 14.3(2024):15.

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来源：地理科学与资源研究所

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