植物营养与肥料学报2025，Vol.31Issue(10)：2015-2028,14.DOI:10.11674/zwyf.2025025
水土保持措施对红壤坡耕地花生-油菜轮作系统温室气体排放的影响
Effects of soil and water conservation methods on greenhouse gas emissions in red soil sloping farmland under peanut-rape rotation system
摘要
Abstract
[Objectives]We studied the impacts of soil and water conservation measures on greenhouse gas emissions from red soil sloping farmland and their comprehensive greenhouse effect,to provide theoretical support for the selection of efficient mitigation technology while maintaining high crop yields.[Methods]A field experiment was conducted in a slope farmland in Jiangxi Province,where the cropping system was peanut-rapeseed rotation.The treatments included conventional tillage with hedgerows(HT),conventional tillage with rice straw mulching during peanut season(MT),and no-tillage(NT),as well as a merely conventional tillage control(CT).The static chamber-gas chromatography method was applied for monitoring in-situ CO2,CH4,and N2O emission fluxes in a year period.The crop yields were recorded,and the global warming potential(GWP)and greenhouse gas intensity(GHGI)were calculated,the influencing factors were proposed using correlation and redundancy analysis.[Results]Compared with CT,MT treatment reduced the cumulative N2O emissions by 13.1%,while NT and HT treatments increased it by 28.5%and 19.7%,respectively.The NT treatment significantly decreased the cumulative CO2 emissions by 10.4%,whereas the HT treatments increased it by 17.9%,with the majority of the increase attributed to CO2 emissions during the rape season.All three treatments showed weak CH4 sink.Redundancy analysis results indicated that air temperature,soil water and nitrate nitrogen content were the key factors determining the emissions of the three greenhouse gases.Under a 100-year CO2-equivalent time scale,the annual GWP of the HT and MT treatments increased by 18.1%and 9.5%,respectively,compared with the CT treatment,while the NT treatment decreased it by 9.4%.The annual GWP was mainly contributed by CO2 emissions,followed by N2O emissions,while soil CH4 emissions had a negative contribution.The HT treatment showed a significantly higher peanut and annual yield than the other treatments.Although it was recorded that HT and MT had higher GWP than CT and NT,HT had a similar GHGI due to higher crop yield,while MT had a significantly higher GHGI.[Conclusions]The soil of peanut-rapeseed rotation farmland on red soil sloping farmland serves as a source of N2O and CO2 emissions,and a weak sink for NH4.Due to high temperature and elevated soil moisture,the greenhouse gas emission intensity during the peanut season is greater than that during the rapeseed season,making it the primary period for greenhouse gas emissions.The planting of hedgerows and straw mulching increases CO2 emissions,resulting in a significant higher global warming potential,compared to conventional tillage.However,since planting hedgerows enhances peanut yield,it subsequently reduced the comprehensive greenhouse emission intensity.Considering the crop yield and environmental effects,both planting hedgerows and no tillage represent relatively ideal soil and water conservation measures for the red soil sloping farmlands.关键词
水土保持耕作/红壤坡耕地/花生-油菜轮作/温室气体/综合温室效应Key words
soil and water conservation tillage/red soil sloping farmland/peanut-rapeseed rotation/greenhouse gas/comprehensive greenhouse effect引用本文复制引用
左继超,赵黎雯,聂小飞,廖凯涛,刘昭,肖胜生,郑海金..水土保持措施对红壤坡耕地花生-油菜轮作系统温室气体排放的影响[J].植物营养与肥料学报,2025,31(10):2015-2028,14.基金项目
国家自然科学基金项目(42367032,42367049) （42367032,42367049）
江西省"双千计划"项目(JXSQ2023201069) （JXSQ2023201069）
江西省自然科学基金项目(20224BAB213039) （20224BAB213039）
江西省主要学科学术和技术带头人培养计划(20225BCJ23005) （20225BCJ23005）
江西省科技+水利联合计划项目(2023KSG01001) （2023KSG01001）
江西省重点研发计划项目(20243BBH81035). （20243BBH81035）
