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1、江西農業(yè)大學碩士學位論文嚴重退化紅壤重建森林的土壤微生物特性研究姓名：楊家林申請學位級別：碩士專業(yè)：森林培育指導教師：劉苑秋杜天真2002.5.1StudiesonsoilmicrobialcharacteristicsofseverclydegradedredsoilinreconstructedforestAbstractThereconstructedforestinseverelydegradedredsoilregioninT

2、ailheCountyhasbeenresearchedinthepaperAccordingtothestudiesonmicrobialquantities，microbialbiomass，respiratoryintensityofthesoilandsoilenzymeactivi吼thesoilmicrobialcharacteristicsofdifferentreconstructedmodelshavebeenanal

3、yzedcomprehensivelyandsystemicallyTheresultsshowthatthediscrepanciesofmicrobialquantitiesandrespiratoryintensityofthesoilindifferentreconstructedmodelsareveryremarkableAmongthemicrobialquantities，bacteriawhichaccountfora

4、bove90％，areatthemost，followedbyactinomycetes，andfungiareattheleastAsfarastheeffectsontheincreaseofthemicrobialquantitiesandrespiratoryintensityateconcerned，mixedforestisatthemost，followedbybroadleafforestandconiferousfor

5、est，andcontrolareaisattheleastThethreekindsofmicroorganismsbacteriaacfinomycetesandfungi—andrespiratoryintensityofthesollindifferentreconstructedmodeIshavethesamevariousrulesTheydecreasestepbystepalongwiththeincreaseofso

6、ildepthBothsoilmicrobesandsoilenzymeactivitieshaveextensiveandintimaterelationshipswiththephysicalandchemicalpropertiesofsoilTheresultsfromcanonicalcorrelationanalysisareasfollows：theircorrelationcoefficientsofthefirstpa

7、ircanonicalvariatesare08737andO9442respectivelyandattainthelevelofgreatsignificanceTheresultsofstepwiseregressiononthefiveenzymesactivitiesandsoilphysicalandchemicalpropertiesarealsopointedoutTherelationshipsbetweensolle

8、nzymeactivitiesandsollmicrobialcharacteristicsarealsoveryintimateThecanonicalcorrelationcoefficientofthefirstpairisashighas09541ThefivekindsofsoilenzymeactivitiesdeclinestepbystepwiththeincreaseofsoildepthThediscrepancie

9、sofsollellzymeactivitiesindifierenttypesofforeststandsarealsoverypalpableAsfarasthesoilenzymeactivitiesareconcerned，mixedforestishighest，followedbybroadleafforest，toniferousforestisattheworstThebiomassesofsoilfinerootsde

10、creasegraduallyalongwiththeincreaseofsoildepthThesollfinerootsindifierentreconstructedmodelsdistributemainlyfrom0cmto20cmbelowthesurfaceTheyaccountforabove7500％oftotalquantitiesofsoilfinerootsandthehighestisupto8740％Thes

11、oilfinerootsandsoilmicrobes，soilenzymeactivitieshavethecorrelationofgreatsignificanceAndthelinearequationsofsoilenzymeactivitiesandsoilfinerootsarealsopointedoutinthepaperThegraysystematicaltheoryhasbeentobeusedtoevaluat

12、ecomprehensivelythemicrobialcharacteristicsTheresultsshowthattherehabilitatedeffectsindifferentreconstructedmodelsareasfollows：pureforestofliquidambarliquidambarslashpine(plantintervalsmixed)pureforestofSchimasuperbaliqu

13、idambarslashpine(rOWintervalsmixed)pureforestofIowdensityPinusrigigidapureforestofeucalyptusuncoveredfieldspureforestofhighdensityPinusrigigidapureforestofslashpineKeywords：Redsoil；SeveredegradationSoilmicrobe：Soilenzyme

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