冬小麦-夏玉米‖夏花生周年种植的农田温室气体排放及碳足迹评价OA北大核心CSTPCD
Assessment of greenhouse gas emissions and carbon footprint associated with annual cultivation of winter wheat-summer corn‖summer peanut in farmland
为探究冬小麦-夏玉米‖夏花生周年种植模式对农田温室气体排放及碳足迹的影响,设置冬小麦-夏玉米、冬小麦-夏花生、冬小麦-夏玉米‖夏花生3种轮作种植方式;其中夏玉米‖夏花生间作设置3∶4,3∶6和6∶8三种行比.通过大田试验研究了周年农田温室气体排放和碳足迹特征.结果表明,夏玉米‖夏花生种植模式能够减少农田温室气体的排放,与玉米单作相比,土壤CO2 和N2O的平均排放通量降幅分别为10.24%～18.75%和10.78%～23.93%、排放总量降幅分别为8.30%～19.12%和14.09%～26.81%.间作减少了后茬冬小麦(轮作模式下)的温室气体排放,间作处理的后茬冬小麦较玉米单作处理的后茬冬小麦土壤CO2排放通量减少3.79%、排放总量减少3.84%;土壤N2O排放通量减少16.80%、排放总量减少17.66%;土壤CH4排放总量呈现"汇"现象.此外,单作玉米生产过程中碳足迹主要来源是氮肥,占总排放的49.13%;单作花生生产过程中碳足迹主要来源是氮肥和地膜,分别占总排放的23.77%和26.06%;间作模式下碳足迹主要来源是氮肥、柴油和地膜,分别占总排放的31.50%、16.74%、17.92%.间作模式增加了后茬小麦碳排放效率、降低了全球增温潜势和温室气体排放强度.综上,冬小麦-夏玉米‖夏花生(间作玉米花生行比3:6)周年种植模式能够减少农田碳排放与作物生产过程中的碳足迹,具有良好的生态效益.
To explore the impact of annual planting patterns of winter wheat summer corn and summer peanut on greenhouse gas emissions and carbon footprint in farmland,3 crop rotation planting methods were set up:winter wheat summer corn,winter wheat summer peanut,and winter wheat summer corn and summer peanut.Among them,the intercropping of summer corn and summer peanut was 3∶4(intercropped corn peanut row ratio of 3∶4),3∶6(in-tercropped corn peanut row ratio of 3∶6),and 6∶8(intercropped corn peanut row ratio of 6∶8),the annual green-house gas emissions and carbon footprint characteristics of farmland were studied through field experiments.Re-sults showed that the intercropping mode of summer corn and summer peanut could reduce greenhouse gas emis-sions in farmland,compared with corn monoculture,the average emission fluxes of soil CO2 and N2O decreased by 10.24%-18.75%and 10.78%-23.93%,respectively,and the total emission decreased by 8.30%-19.12%and 14.09%-26.81%,respectively.Intercropping reduced greenhouse gas emissions from subsequent winter wheat crops(under rotation mode),resulting in 3.79%decrease in soil CO2 emissions and 3.84%decrease in total emis-sions compared to corn monoculture treatment.Soil N2O emission flux decreased by 16.80%and the total emission decreased by 17.66%;the total amount of CH4 emissions from soil showed a"sink"phenomenon.In addition,the main source of carbon footprint in monoculture corn production was nitrogen fertilizer,accounting for 49.13%of the total emissions;the main sources of carbon footprint in monoculture peanut production were nitrogen fertilizer and plastic film,accounting for 23.77%and 26.06%of total emissions,respectively;the main sources of carbon footprint under intercropping mode were nitrogen fertilizer,diesel,and plastic film,accounting for 31.50%,16.74%,and 17.92%of the total emissions,respectively.The intercropping mode increased the carbon emission efficiency of sub-sequent wheat crops,reduced the global warming potential,and greenhouse gas emission intensity.In summary,the annual planting model of winter wheat summer corn and summer peanut(intercropped corn peanut row ratio of 3∶6)could reduce carbon emissions from farmland and carbon footprint in crop production,and was beneficial for ecolo-gy.
贾文玘;伊淼;张佳蕾;杨莎;孟静静;张正;郭峰;王建国;万书波
山东省农业科学院,山东 济南,250100||青岛农业大学农学院,山东 青岛,266109青岛农业大学农学院,山东 青岛,266109||汶上县第一中学,山东 济宁,272500山东省农业科学院,山东 济南,250100
农业科学
玉米-花生间作农田温室气体排放碳足迹全球增温潜势
corn peanut intercroppinggreenhouse gas emissions from farmlandcarbon footprintglobal warming potential(GWP)
《中国油料作物学报》 2024 (003)
664-675 / 12
国家现代农业产业技术体系(CARS-13);山东省重点研发计划项目(ZFJH202310、2022CXPT031、2023TZXD012);泰山学者工程(tsqn202211275、tspd20221107);山东省现代农业产业技术体系(SDAIT-04-05)
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