Warming intensified the effects of nitrogen addition on N_(2)O emissions from alpine meadow in the northern Qinghai-Tibet Plateau
作者机构：Institute of Environment and Sustainable Development in AgricultureChinese Academy of Agricultural SciencesBeijing 100081China National Agricultural Experimental Station for Agricultural EnvironmentNagqu 852100China Ecology and Nature Conservation InstituteChinese Academy of ForestryBeijing 100091China College of Resource and EnvironmentAnhui Science and Technology UniversityFengyang 233100China Nagqu AgricultureAnimal Husbandryand Prataculture Science and Technology Research and Extension CenterNagqu 852100China Tongliao Experimental Middle SchoolTongliao 028000China
出 版 物：《Advances in Climate Change Research》 (气候变化研究进展（英文版）)
年 卷 期：2024年第15卷第1期
页 面：101-112页
核心收录：
学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学]
基 金：supported by National Natural Science Foundation of China (32171590) Second Tibetan Plateau Scientific Expedition and Research Project (2019QZKK0307) Nagqu Science and Technology Project (NQKJ-2023-02) Youth innovation Program of Chinese Academy of Agricultural Sciences (Y2023QC08)
主 题：Alpine meadow Community composition Nitrogen addition Nitrous oxide flux Qinghai-Tibet Plateau Warming
摘 要：Warming and nitrogen(N)addition may impact soil nitrous oxide(N_(2)O)emissions,but the relationship between plant community composition and soil microbial activities remains *** 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 N_(2)O *** found that the N-addition greatly increased N_(2)O emissions by 77.4%in 2018 when compared to the control *** contrast,warming showed little effect on N_(2)0 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 N_(2)0 emissions,respectively,compared to the individual treatments of warming or *** warming in alpine meadows is causally linked to increased legume biomass which is further intensified with the *** legume biomass(p0.05),soil moisture(p0.001)and enzyme activity(p0.001)had a positive effect on N_(2)0 emissions,while diminished microbial carbon/nitrogen(MBC/MBN)(p0.05)correlated with reduced N_(2)O *** results indicated that N-addition has a positive effect on N_(2)O emissions,and the addition of warming further intensifies this *** increased dominance of legumes and microbial N content contributes to this *** outcomes suggest that warming and atmospheric N deposition can stimulate N_(2)O emissions of alpine meadows inthefuture.
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