植物营养与肥料学报2026，Vol.32Issue(2)：320-332,13.DOI:10.11674/zwyf.2025388
优化栽培施肥技术改善麦-玉轮作系统土壤结构并降低温室气体排放
Optimized management practices reduce greenhouse gas emissions by improving soil aggregate structure in a wheat-maize rotation system
摘要
Abstract
[Objectives]The effects of different irrigation and fertilization management practices on soil aggregation structure,soil pore characteristics,and greenhouse gas emissions were studied in a wheat-maize rotation system in the North China Plain,aiming to reveal the physicochemical mechanisms underlying the regulation of greenhouse gas production and emissions by water and fertilizer management.[Methods]A field experiment was conducted in Quzhou County,Handan City,Hebei Province,from 2022 to 2024.Five treatments were established:conventional fertilization(CK);four-dense-one-sparse planting with shallow-buried drip fertigation(Y1);Y1 supplemented with a microbial agent(Y2);Y1 supplemented with bio-organic fertilizer(Y3);and Y1 supplemented with a soil conditioner(Y4).Greenhouse gas(N2O,CO2,and CH4)fluxes,topsoil aggregate composition,and soil pore structure were monitored.[Results]Compared with CK,the Y1 treatment reduced greenhouse gas emission intensity(GHGI)by 21.21%,increased the mean weight diameter(MWD)of aggregates by 17.59%,and improved soil porosity by 29.38%.The application of functional fertilizers(Y2,Y3,and Y4)further improved soil structure and reduced GHGI.Compared with Y1,the MWD and geometric mean diameter(GMD)of soil aggregates under Y2,Y3,and Y4 treatments increased by 25.82%and 29.07%on average,while soil porosity increased by 10.46%and GHGI decreased by 21.15%.No significant differences were observed among Y2,Y3,and Y4.Correlation analysis showed that soil porosity,fractal dimension,and pore density were significantly and positively correlated with the proportion of>2 mm and 1-2 mm aggregates.Enhancing the proportion of large aggregates mitigated greenhouse gas emissions from croplands by improving soil pore structure and aeration,thereby reducing the GHGI in the wheat-maize rotation system of the North China Plain.[Conclusions]In the wheat-maize rotation system of the North China Plain,the management strategy of combining four-dense-one-sparse planting with shallow-buried drip fertigation can simultaneously achieve water saving,fertilizer saving,and yield increase.Based on this,the application of functional fertilizers,especially bio-organic fertilizer,can further significantly enhance soil aggregate stability,improve soil aeration,and reduce greenhouse gas emissions.Therefore,this combination of management techniques represents an optimized cultivation and fertilization mode for the North China region.关键词
麦-玉轮作系统/水肥一体化/土壤团聚体/土壤孔隙结构/温室气体Key words
wheat-maize rotation system/fertigation/soil aggregates/soil pore structure/greenhouse gas引用本文复制引用
敦文静,王恒,于欣慧,何悦,郝展宏,王琛,张丽娟,张杰..优化栽培施肥技术改善麦-玉轮作系统土壤结构并降低温室气体排放[J].植物营养与肥料学报,2026,32(2):320-332,13.基金项目
国家重点研发计划项目(2021YFD1901003). （2021YFD1901003）
