農(nóng)田土壤線蟲(chóng)群落垂直分布特征研究.pdf

1、沈陽(yáng)師范大學(xué)碩士學(xué)位論文農(nóng)田土壤線蟲(chóng)群落垂直分布特征研究姓名：曲業(yè)兵申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：動(dòng)物學(xué)指導(dǎo)教師：薛萬(wàn)琦20050401ResearchonVerticalDistributionPatternsofAgricultralSoilNematodeCommunitiesAbstractThisexperimentwasconductedattheShenYangExperimentStationofEcologytostudyV

2、erticalVariationPaternsofNematodeCommunitiesdowntoadepthof150cmunderfourlandusepractices(paddyfielduplandfieldfallowlandandwoodland).Itprimarilyshowstheverticalvariationcharacteristicofthenematodecommunityinthesoillayers

3、underthediferentusetypesandtherelationshipbetweenthevarietyofthesoilnematodeandthediferentecosystem.ThedatathataregotareanalyzedbyusingmaincompositionanalyzingandgroupanalyzingTheresultisasfollows:1.Thenematodesof54gener

4、aarerecordedamongfourlandusetypes.Amongthemthereare39generaintheecologyofwoodlandwhichranksthefirst，thensuccessivelyputdown35fallowland，30uplandecosystems，29ecosystemsofpaddyfield2.Amongeveryecosystemthequantityofsoilnem

5、atodeappearsbasicallytheregularitythatitwillreduceasthedepthoftakingsampleincreases.3.Thenematodeisdiferentinquantityamongthesamedepthoftheeveryecosystemmaturityindexesarediferenttoo.4.Thenematodecommunityofthetensoillay

6、ersunderfourkindsoflandusetypesmakeupfourmaingroups.5.Thefactorialanalysisoffourkindsoflandutilizewayindicatesthatthesamplesofthediferentlayerunderthelandusetypeareobviouslyseparated.6.Amongthepaddyfieldandtheuplandmanki

7、ndlongtermdisturbancedoesnotmakethenematodecommunityofthesoillayerofthecultivatedlandreachequality.7.Thenematodegenusshowsundereachkindoflandoccupationmodethatthesingledepthofcharacteristicisdistributed.Theenrichdegreesi

8、ndexHandtheconsistencyindexJ’ofthe05cmdepthofforestlandcomparedwiththreekindsofotherlandusetypeshaveminimums.Ourresearchhasoferedtheclearevidencethatthediferentlandusetypehasthediferentimpactonnematodes.Spacemodelwhichis