嚴(yán)重退化紅壤重建森林的土壤微生物特性研究.pdf

1、江西農(nóng)業(yè)大學(xué)碩士學(xué)位論文嚴(yán)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(qǐng)學(xué)位級(jí)別：碩士專業(yè)：森林培育指導(dǎo)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