Refining the Factors Affecting N_(2)O Emissions from Upland Soils with and without Nitrogen Fertilizer Application at a Global Scale  

作　　者：Wenqian JIANG Siqi LI Yong LI Meihui WANG Bo WANG Ji LIU Jianlin SHEN Xunhua ZHENG 

机构地区：[1]State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China [2]Key Laboratory for Agro-ecological Processes in Subtropical Regions,Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha 410125,China [3]Changsha Research Station for Agricultural&Environmental Monitoring,Chinese Academy of Sciences,Changsha 410125,China [4]University of Chinese Academy of Sciences,Beijing 100049,China [5]State Environmental Protection Key Laboratory of Formation and Prevention of the Urban Air Pollution Complex,Shanghai Academy of Environment Sciences,Shanghai 200233,China [6]Institute of Carbon Neutrality,Qilu Zhongke,Jinan 251699,China [7]Hubei Province Key Laboratory for Geographical Process Analysis and Simulation,Central China Normal University,Wuhan 430079,China [8]Department of Ecohydrology,Leibniz Institute of Freshwater Ecology and Inland Fisheries,Berlin 12587,Germany [9]Key laboratory of Environment Change and Resources Use in Beibu Gulf,Ministry of Education,Nanning Normal University,Nanning 530001,China [10]Golden Mantis school of Architecture,Soochow University,Suzhou 215123,China

出　　处：《Advances in Atmospheric Sciences》2024年第9期1804-1820,共17页大气科学进展（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Grant No. 42161144002);the National Key Research and Development Programs of China (Grant No. 2022YFE0209200-03);the Suzhou Agricultural Science, Technology and Innovation Programs of Suzhou Agricultural Department (Grant No. SNG2022011);the special fund of State Environmental Protection Key Laboratory of Formation and Prevention of the Urban Air Pollution Complex (SEPAir2022080590)

摘　　要：Nitrous oxide(N_(2)O)is a long-lived greenhouse gas that mainly originates from agricultural soils.More and more studies have explored the sources,influencing factors and effective mitigation measures of N_(2)O in recent decades.However,the hierarchy of factors influencing N_(2)O emissions from agricultural soils at the global scale remains unclear.In this study,we carry out correlation and structural equation modeling analysis on a global N_(2)O emission dataset to explore the hierarchy of influencing factors affecting N_(2)O emissions from the nitrogen(N)and non-N fertilized upland farming systems,in terms of climatic factors,soil properties,and agricultural practices.Our results show that the average N_(2)O emission intensity in the N fertilized soils(17.83 g N ha^(-1)d^(-1))was significantly greater than that in the non-N fertilized soils(5.34 g N ha^(−1) d^(−1))(p<0.001).Climate factors and agricultural practices are the most important influencing factors on N_(2)O emission in non-N and N fertilized upland soils,respectively.For different climatic zones,without fertilizer,the primary influence factors on soil N_(2)O emissions are soil physical properties in subtropical monsoon zone,whereas climatic factors are key in the temperate zones.With fertilizer,the primary influence factors for subtropical monsoon and temperate continental zones are soil physical properties,while agricultural measures are the main factors in the temperate monsoon zone.Deploying enhanced agricultural practices,such as reduced N fertilizer rate combined with the addition of nitrification and urease inhibitors can potentially mitigate N_(2)O emissions by more than 60%in upland farming systems.

关 键 词：N_(2)O emissions influencing factors nitrogen cycling upland farming systems 

分 类 号：X144[环境科学与工程—环境科学]