生物炭配施硝化抑制剂对热区稻菜轮作土壤 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）06-1667-08 doi：10.11654/jaes.2024-0548
Effectsof combined applicationofbiochar and nitrification inhibitoron N2O emission from tropical ricevegetablerotationsoilsinHainanregion
WANG Xiaoqi1，JIANG Chunlan²，MENGLongwei²，LI Kaikai²， WU Yanzheng³，ZHU Qilin，MENG Lei³* （1.HainanGuoweiYikeEnviroentCo.Ld.，Hainan5oo，China;2.HainaResearchcademyfEvironentalSiences，Hinan ，China; 3.School ofBreedingand Multiplication，Hainan University，Sanya 572O25，China）
Abstract：ToelucidatetheimpactsandmechanismsofbiocharandnitificationinhibitorsonNOmisionfromrice-vegetablerotation soils in Hainan. The experiment set up without biochar and nitrification inhibitor treatments（CK），adding 2% biochar（B）， 2% biochar combined with nitrification inhibitor dicyandiamide（DCD;BD，addition amount is 5% of pure nitrogen）and 3，4-dimethylpyrazole phosphate（DMPP; BP， addition amount is 1% of pure nitrogen），and combined with 1/2 of DCD and DMPP（BDP）.Each treatment set to the flooding environment and 60% soil watercapacity（WHC），respectively.Biochar added significantly increased the soil organic carbon （SOC）contentsandtotalnitrogen（T）underdiferentwaterconditions.Biocharaditionsignificantlyincreasedthecontentsofsoil microbialbiomasscarbon（MBC）andmicrobialnitrogen（MBN）underdiferentwaterconditionscomparedwithCK.However，compared withBtreatment，theMBCcontentdecreasedsignificantlyofbiocharcombinedwithnitrificationinibitortreatments.Under60%WHC condition，theiocharddionsignificantlyicreasdoilp，andeombinatoofocharndrificatioiibitorfutcasd soilpH.ComparedwithCK，biocharadditionsignificantlypromotedsoilNOcumulativemisionat%WHC.ThecumulativeslO emisionof inBDwassignificantlylowerthanthatinCKandBtreatments.ThecumulativesoilN2OemissoninBPandBDPwas significantlyhighrtatatinCK，utsigificantllowertantatinBtreatment.Underflodingcondiio，Btreatmentsiantly promotedsoilNOemissoncompaedwithCK，andbiocharadditioncombinedwithnitrficationinhibitorssignificantlyreducedthe cumulativeNOemisioaddingbocartoicevegetablerotationsoilcanpromotesoilNOemissointheshortter.AingDCD canffectivelyreducesoilNOemissonsindrylandcondions，andapplyingDCDandDMPPunderfloodedcondionscansigiicantly reduce soil N2O emissions，with the best effect when both are applied but the dosage is halved.
eywords：biochar;nitrificationinhibitor; N2O emissions;tropical; rice-vegetable rotation syster
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