首页|Warming intensified the effects of nitrogen addition on N2O emissions from alpine meadow in the northern Qinghai-Tibet Plateau

Warming intensified the effects of nitrogen addition on N2O emissions from alpine meadow in the northern Qinghai-Tibet Plateau

扫码查看
原文链接
  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
Warming and nitrogen(N)addition may impact soil nitrous oxide(N2O)emissions,but the relationship between plant community composition and soil microbial activities remains unclear.For a two-year field study in the Qinghai-Tibet Plateau,open-top chambers were used to quantify the effects of warming,N-addition,and their interactions on N2O emissions.We found that the N-addition greatly increased N2O emissions by 77.4％in 2018 when compared to the control group.In contrast,warming showed little effect on N2O emissions but did increase the activity of enzymes associated with soil nitrification and denitrification.A combined effect of warming and N-addition of resulted in 208.6％(2018)and 90.8％(2019)increase in N2O emissions,respectively,compared to the individual treatments of warming or N-addition.Global warming in alpine meadows is causally linked to increased legume biomass which is further intensified with the N-addition.Intensified legume biomass(p＜0.05),soil moisture(p＜0.001)and enzyme activity(p＜0.001)had a positive effect on N2O emissions,while diminished microbial carbon/nitrogen(MBC/MBN)(p＜0.05)correlated with reduced N2O emissions.Final results indicated that N-addition has a positive effect on N2O emissions,and the addition of warming further intensifies this effect.The increased dominance of legumes and microbial N content contributes to this effect.These outcomes suggest that warming and atmospheric N deposition can stimulate N2O emissions of alpine meadows in the future.

Alpine meadowCommunity compositionNitrogen additionNitrous oxide fluxQinghai-Tibet PlateauWarming

Ming-Jie LI、Yi-Qing GE、Hasbagan GANJURJAV、Guo-Zheng HU、Hong-Bao WU、Jun YAN、Shi-Cheng HE、Qing-Zhu GAO

展开 >

Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agricultural Sciences,Beijing 100081,China

National Agricultural Experimental Station for Agricultural Environment,Nagqu 852100,China

Ecology and Nature Conservation Institute,Chinese Academy of Forestry,Beijing 100091,China

Tongliao Experimental Middle School,Tongliao 028000,China

College of Resource and Environment,Anhui Science and Technology University,Fengyang 233100,China

Nagqu Agriculture,Animal Husbandry,and Prataculture Science and Technology Research and Extension Center,Nagqu 852100,China

展开 >

National Natural Science Foundation of ChinaSecond Tibetan Plateau Scientific Expedition and Research ProjectNagqu Science and Technology ProjectYouth innovation Program of Chinese Academy of Agricultural Sciences

321715902019QZKK0307NQKJ-2023-02Y2023QC08

2024

10.1016/j.accre.2024.01.007

气候变化研究进展(英文版)
国家气候中心

气候变化研究进展(英文版)

影响因子：0.806
ISSN：1674-9278
年,卷(期)：2024.15(1)
  • 75