三种杀菌剂对海南冬季蔬菜地土壤N₂O排放的影响

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中图分类号：X144 文献标志码：A 文章编号：1672-2043（2025）11-3005-10 doi：10.11654/jaes.2025-0020

Abstract：ToinvestigateteeffctsoffungicidesonNOemissosfromvegetablesoilsinHainanuringwnterthisstudycoducteda laboratoryincubatioeperimetwithfourtreaments：otrol（CK），arbendazi（CA），ifeoonzole（DF），anzoxystrob（O）. TheresultsdemonstratedthatcomparedtoCK，CAR，DIF，andAZOtreatmentssignificantlyincreasedcumulativeNOeisionsby （20 23.38% ， 27.27% ，and 27.28% ，respectively.The DIF treatment enhanced denitrification potential by 9.57% compared to CK and significantly elevated soil enzyme activities（ β- glucosidase，N-acetyl- -β- D-glucosaminidase，and acid phosphatase）. In contrast， CAR and AZO treatments reduced denitrification potential，potentially inhibiting the conversionof N2O to N2 and thereby increasing N2O emisions.Futerore，tlaieontrbutiosoffungaldenitrfiatioinCAR，DFndZOtreamntseresintlytedby （20 52.17% ， 53.15% ，and 46.42% ，respectively，compared to CK.Fungicidesreduced soil pH，which favored fungal activityand shifted N 20 （2 productionpathwaysfrombacterial-domiatedtofungal-dominateddenitrification，ultimatelyamplifyingNOemissionsThisstudy revealsthatfungicidesmayindirectlynhanceNOemisionsinwintervegetablesoilsofHainanbyalteringmirobialcomuitisand nitrogen transformation processes.

Keywords：fungicides; soils; vegetable field; nitrogen cycling; N2O emissions

农药在农业生产中的广泛使用显著提升了农作物的产量，通过有效防治病虫草害为粮食安全做出了重要贡献。（剩余22676字）