核农学报2026，Vol.40Issue(2)：394-403,中插1-中插4,14.DOI:10.11869/j.issn.1000-8551.2026.02.0394
基于Meta分析的氮肥施用对我国粮田N2O和CH4排放影响研究
Impact of Nitrogen Fertilizer Application on N2O and CH4 Emissions from Croplands in China:A Meta-Analysis
摘要
Abstract
To elucidate the effects of nitrogen fertilizer application on N2O and CH4 emissions from croplands in China,a meta-analysis was conducted focusing on major grain-producing regions(wheat,maize,and rice).The study compared the impacts of various climatic conditions,soil basic physicochemical properties,and nitrogen fertilizer management practices on soil N2O and CH4 emissions,global warming potential(GWP),and greenhouse gas intensity(GHGI)after nitrogen fertilizer application.The results indicated that the warm temperate climate zone exhibited the highest increases in cumulative N2O emissions,GWP,and GHGI after nitrogen application.Mean annual temperature significantly influenced cumulative N2O emissions and GWP,while annual precipitation and sunshine hours had greater effects on cumulative CH4 emissions and GHGI,respectively.Cumulative N2O emissions were higher when soil total nitrogen content ranged from 0.9 to 1.5 g·kg-1,whereas cumulative CH4 emissions were higher when soil total nitrogen exceeded 1.5 g·kg-1.Cumulative N2O and CH4 emissions,GWP,and GHGI were all higher when soil organic matter content was between 15 and 30 g·kg-1.Increasing soil pH promoted greenhouse gas emissions.Nitrogen application rate had a significant(P＜0.05)positive effect on cumulative N2O emissions.Split application of nitrogen fertilizer(base+topdressing)was more effective in reducing emissions compared to a single basal application.The combined application of nitrogen fertilizer with biochar resulted in lower increases in GWP and GHGI compared to straw return and organic fertilizer treatments.Slow-release nitrogen fertilizers produced fewer greenhouse gases than conventional fertilizers.In conclusion,optimizing nitrogen management by adopting split application(base＜topdressing,base-to-topdressing ratio of 5∶5 to 0∶10),using slow-release nitrogen fertilizers,or combining nitrogen with biochar can effectively reduce soil greenhouse gas emissions and lower emission intensity compared to conventional nitrogen fertilizer practices in major grain-producing regions of China.The results of this study are of great significance for the scientific application of nitrogen fertilizers and greenhouse gas mitigation in Chinese croplands.关键词
Meta分析/氮肥/氧化亚氮(N2O)/甲烷(CH4)/温室气体排放强度(GHGI)Key words
meta-analysis/nitrogen fertilizer/N2O/CH4/greenhouse gas intensity(GHGI)引用本文复制引用
韩莹,张思源,刘宇,闫秋艳,闫双堆..基于Meta分析的氮肥施用对我国粮田N2O和CH4排放影响研究[J].核农学报,2026,40(2):394-403,中插1-中插4,14.基金项目
山西省重点研发计划项目(201803D221003-2),山西农业大学博士启动计划项目(2022BQ37),山西省高等学校教学改革创新项目(J20240497),山西农业大学教学改革研究项目(JG-202305) （201803D221003-2）
