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时间:2020-03-25
《控释肥对土壤氮素反硝化损失和N2O排放的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、农业环境科学学报2010,29(5)i1015—1019JournalofAgro-EnvironmentScience控释肥对土壤氮素反硝化损失和N20排放的影响丁洪1'2,王跃思2,秦胜金1,张玉树1,项虹艳1,李卫华1(1.福建省农业科学院土壤肥料研究所,福州350013;2.中国科学院大气物理研究所,大气边界层物理和大气化学国家重点实验室(LAPC),北京100029)摘要:在实验室培养条件下,研究了3种控释肥对土壤氮素硝化反硝化损失和N20排放的影响。结果表明,控释肥具有明显控制氮素释放的作用。在培养的前23d,控释肥处理的土壤NⅢ一N含量低于尿素处理,而后则高于尿素处理。各肥料处
2、理土壤NO;一N含量均随培养时间逐渐增加,但不同肥料处理问差异不显著。28d培养期间,施入控释肥的土壤反硝化氮损失量为30.33~30.91mgN·kg。土,比施加尿素处理土壤低13.83—14.41mgN·kg-1土,差异达到显著水平(P3、5EffectsofControlledReleaseFertilizersonNitrogenLossbyDenitrificationandN20EmissionDINGHon912'WANGYue-si2,QINSheng-jin’,ZHANGYu-shul,XIANGHong-yan’,LIWei-hua‘(1.InstituteofSoilandFertilizer,FujianAcademyofA蜊culturalSciences,Fuzhou350013,China;2.LAPC,InstituteofAtmosphericPhysics,ChineseAcademyofSci4、ences,Bering100029,China)Abstract:A28一daysincubationexperimentwasconductedtostudytheeffectsofthleeControlledReleaseFertilizers(CRFs)onthenitrogenlOSSbydenitrificationandN20emission.TheresultsshowedtheCRFshadsignificantdelayedeffectonthenitrogenrelease.Beforeday23thoftheincubation,thesoilNH:一Nconten5、tsinCRFstreatmentswerelowerthanthatinureatreatment.andthefactWasoppositeafterday23t}1.ThesoilNO;一Ncontentsinallfertilizertreatmentsincreasedwiththetimeofincubation,but。themwerenosignificantdifferencesa—mongtreatments.After28days,theNlossamountsbydenitrificationwere30.33—30.91mgN·kg—soilinCRFstreatm6、ents.whichwere13.83-14.41mgN·k—soillowertIlallthatofureatreatment(P<0.05).TheCRFsdecreasedtheratesofdenitrification10ssesinnitrogenfe卜tilizerby3.45-3.60percentagepoint.TheN20emissionamountswere15.71-20.45mgN·kg一1soilinCRFstreatmentswhichwere13.83一14.41mgN·kg~soilhigherthaninureatreatment,but,thedif7、ferencesdidnotreachedsignificantlevels.Keywords:controlledreleasedfertilizer;urea;nitrification—denitrification;N20emission农田土壤硝化和反硝化过程是氮素损失的主要途径之一。氮肥的硝化和反硝化气态损失一方面降低了氮肥利用率,另一方面形成的氮氧化物释放又是大气重要的污染源㈣。Aulakh等【
3、5EffectsofControlledReleaseFertilizersonNitrogenLossbyDenitrificationandN20EmissionDINGHon912'WANGYue-si2,QINSheng-jin’,ZHANGYu-shul,XIANGHong-yan’,LIWei-hua‘(1.InstituteofSoilandFertilizer,FujianAcademyofA蜊culturalSciences,Fuzhou350013,China;2.LAPC,InstituteofAtmosphericPhysics,ChineseAcademyofSci
4、ences,Bering100029,China)Abstract:A28一daysincubationexperimentwasconductedtostudytheeffectsofthleeControlledReleaseFertilizers(CRFs)onthenitrogenlOSSbydenitrificationandN20emission.TheresultsshowedtheCRFshadsignificantdelayedeffectonthenitrogenrelease.Beforeday23thoftheincubation,thesoilNH:一Nconten
5、tsinCRFstreatmentswerelowerthanthatinureatreatment.andthefactWasoppositeafterday23t}1.ThesoilNO;一Ncontentsinallfertilizertreatmentsincreasedwiththetimeofincubation,but。themwerenosignificantdifferencesa—mongtreatments.After28days,theNlossamountsbydenitrificationwere30.33—30.91mgN·kg—soilinCRFstreatm
6、ents.whichwere13.83-14.41mgN·k—soillowertIlallthatofureatreatment(P<0.05).TheCRFsdecreasedtheratesofdenitrification10ssesinnitrogenfe卜tilizerby3.45-3.60percentagepoint.TheN20emissionamountswere15.71-20.45mgN·kg一1soilinCRFstreatmentswhichwere13.83一14.41mgN·kg~soilhigherthaninureatreatment,but,thedif
7、ferencesdidnotreachedsignificantlevels.Keywords:controlledreleasedfertilizer;urea;nitrification—denitrification;N20emission农田土壤硝化和反硝化过程是氮素损失的主要途径之一。氮肥的硝化和反硝化气态损失一方面降低了氮肥利用率,另一方面形成的氮氧化物释放又是大气重要的污染源㈣。Aulakh等【
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