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1、应用生态学报2003年12月第14卷第12期CHINESEJOURNALOFAPPLIEDECOLOGY,Dec.2003,14(12)∶2273～2277不同水分管理下稻田土壤CH4和N2O排放3与微生物菌群的关系33岳进黄国宏梁巍焦志华梁战备王琛瑞史奕(中国科学院沈阳应用生态研究所陆地生态过程重点实验室,沈阳110016)【摘要】采用MPN计数法对黑土(海伦)和草甸棕壤(沈阳)稻田生长季4种微生物菌群数量进行了测定,同时采用封闭式箱法对CH4和N2O通量进行观测,以深入了解稻田生物源温室气体排放的微生物学过程.两地试验田均采用长期淹灌与间歇灌溉两种不同水分管理.对实验结果多元
2、回归分析,结果表明,海伦与沈阳两地稻田两种水分管理条件下CH4通量季节变化与产甲烷菌数季节变化存在极显著正相关关系.沈阳稻田生长季CH4通量季节变化与甲烷氧化菌数季节变化具有显著正相关性.间歇灌溉条件下黑土稻田N2O通量与反硝化菌数呈显著性正相关关系.两种水分管理条件下沈阳稻田N2O通量与硝化菌数具有显著正相关关系.间歇灌溉条件下沈阳稻田N2O通量与反硝化菌数呈显著性正相关关系.关键词产甲烷菌甲烷氧化菌硝化细菌反硝化细菌CH4N2O文章编号1001-9332(2003)12-2273-05中图分类号S181文献标识码ARelationshipbetweenCH4andN2Oemi
3、ssionsandrelatedmicroorganismpopulationsinpaddysoilsunderdif2ferentwatermanagementregimes.YUEJin,HUANGGuohong,LIANGWei,JIAOZhihua,LIANGZhanbei,WANGChenrui,SHIYi(KeyLaboratoryofTerrestrialEcologicalProcess,InstituteofAppliedEcology,Chi2neseAcademyofSciences,Shenyang110016,China).2Chin.J.Appl.E
4、col.,2003,14(12):2273～2277.Methanogens,methanotrophs,nitrifiersanddenitrifiersaretheimportantmicroorganismsintheproductionandconsumptionofCH4andN2Oinsoil.Inordertounderstandthemicrobialprocessesrelatedtothetwogreen2housegasesinpaddysoil,thefourbacteriagroupsinphaeozem(Hailun)andburozem(Shenya
5、ng)weresurveyedduringricegrowthseasonbyusingMPNcountingtechnique.TheCH4andN2Oemissionsweremeasuredwithclosedchambermethod.Twodifferentwatermanagementregimes,i.e.,continualirrigationandintermittentir2rigation,wereusedforthetwopaddysoils.Theresultsofmultipleregressionanalysisshowedthattherewasa
6、significantlypositivecorrelationbetweenCH4emissionandmethanogenpopulationinbothphaeozemandburozemundertwowatermanagementregimes.InthesoilofShenyang,therewasasignificantlypositivecorre2lationbetweenCH4emissionandmethanotrophpopulation.TheN2Oemissionwassignificantlycorrelatedtothedenitrifierpop
7、ulationinbothphaeozemandburozemunderintermittentirrigation,andinthesoilofShenyang,therewasasignificantlypositivecorrelationbetweenN2Oemissionandnitrifierpopulationundertwowaterman2agements.KeywordsMethanogens,Methanotrophs,Nitrifiers,Denitrif
