甲基溴土壤消毒替代技術(shù)中的線蟲生態(tài)學(xué)初步研究.pdf

1、中國農(nóng)業(yè)大學(xué)碩士學(xué)位論文甲基溴土壤消毒替代技術(shù)中的線蟲生態(tài)學(xué)初步研究姓名：于永莉申請學(xué)位級別：碩士專業(yè)：生態(tài)學(xué)指導(dǎo)教師：曹志平2002.5.1ABSTRACTTheaimofresearchwastoselectandevaluatethealternativetechnologiestotheuseofmethylbromidethroughanalyzingthequantitychange，communitystructureof

2、nematodeandtherelationshipbetweenthenematodequantityandmicrobialbiomassandsoilphysicalandchemicalcharacteristicamongtreatments(Mn，MBVIFMS，MSVIFSSBCA，CK)Theresultsaleasfollows1Nematodesidentifiedmainlyincludedfourfamilies

3、：Rhabditlda、nlenchida，Dorylaimida、Monhysterida。Furthermorewedistinguishedthemintofourtypessuchasfeedingbacteria，feedingfungi，feedingplantandpredatorbasedonthenutritioncharacteristic2Thevarianceanalysissuggestedthediffere

4、nceofthenematodesumandfeedingplantnematodequantitywasnotsignificantamongtreatmentsMB，MBVIFMSandMSVIEButthesignificaneeexistedbetweenSSBCAandtheabovefonrtreatmentsbetweenCKandtheotherfivetreatments3Thecommunitystructureof

5、treatmentsMB，MBVIF，MS。MSVIFwasmuchsimilarbutnotwiththatofSSBCAorClLwhichindicatedthesefourtreatmentsshouldbelongtoonegroup，whileSSBCAasagroupseparatelyCKonegroupbyclusteranalysis4Theseasonaldynamieofsoilnematodewasalsoan

6、alyzedThesumofnematodeupswingedtothetopinJuneandJulythendeclinedinSeptemberandobtainedthebottominDeeemberTheincreasingtrendoccurredinthenextJanuary工TheincidenceofMeloidogyneinMB，MBVIF，MS，MSWIFdeclinedobviouslycomparisonw

7、ithSSBCAorCl‘NosignificanceexistedinSSBCAandCl‘6ThevarianceanalysisshowedthedifrerenceofmicrobialbiomasswassignificantbetweenthefourtreatmentsMBMBVIFMSMSVIFandtheClLHoweveritonlyoccurredduringthefirstmonthaftersoilfumiga

8、tionLaterthesignificancedisappearedTherewasalwaysnosignificanceinmicrobiaIbiomassbetweenSSBCAandCK7Positiverelation(p《001)existedapparentlybetweenthequantityofbacterivorousnematodeandsolImicrobialbiomassNosignificantrola

9、tionexistedbetweenthesumofnematode，orsoilmicrobialbiomassandthenutritionofsoilBasedontheaboveresults，weconcludedthethreetreatmentsMBVIF，MSandMSVIFCallprimarilytakeplaceoftheMBwhileSSBCAdoesnotplaytheroleinsubstitutionofM