閩北山地上位闊葉林對(duì)毛竹林生產(chǎn)力的影響.pdf

1、南京林業(yè)大學(xué)碩士學(xué)位論文閩北山地上位闊葉林對(duì)毛竹林生產(chǎn)力的影響姓名：侯慧峰申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：生態(tài)學(xué)指導(dǎo)教師：王福升20070601EffectsofupsidebroadleafforestontheproductivityofPhyllostachysheterocyclavatpubescensforestsofmountainareasinNorthernFujianProvineeAbstraetThispapertake

2、PhyllostachysheterocyclavarpubescensmountainsexistingbroadleafforestthatonthemountaintopasstudyobjectsWeanalysisedtheeffectsofmountaintopbroadleafforestsontheproductivityofPhyllostachysheterocyclavarpubescensforests、soil

3、gravimetricwatercontentofPhyllostachysheterocyclavarpubescensforestsonthebudsproutperiod、soilorganicmattercontentandhypogealstructureofPhyllostachysheterocyclavarpubescensforestsThispapertotallyresearchedA、B、C、Dfourtypes

4、TheproportionofbroadleafforestORthemountaintopintotalslopeprojectionarearespectivelyis31％、15％、4％，O％WesettedaseriesofplotsoneachtypeandinvestigatedseveralmainfactorsAfterestablishingfunctions，wekeepotherfactors(onmeanleve

5、l)unchanged，thenanalysistheeffectsofbroadleafforestonthemountaintoptoPhyllostachysheterocyclavarpubescensforestatdifferentaltitudeThemainconclusionsareasfollows：1ThebiggestmeanchestheightdiameterofPhyllostachysheterocycl

6、avarpubescensforestistypeB，thesecondistypeD，thelastistypeAThereisaphenomenonoftypeA&BthatchestheightdiameterincreasesgraduallywhenaltitudeincreasingTypeDreversetothatTheincrementextentoftypeBisthebiggest2Ataltitude850mar

7、ea，theaveragechestheightdiameteroftypeA、B、DincreasegraduallywiththeincrementofmixedproportionThesmallestincrementextentistypeB，thesecondistypeA，thebiggestistypedItcanbeconcludedthattheexistenceofmountaintopbroadleafweake

8、nthePhyllostachysheterocyclavarpubescensforest’SdependenceonmixedproportionThereforeonthePhyllostachysheterocyclavarpubescensmountainsthatexistmountaintopbroadleafforestcanplantmorepurebambooforest3Thebiggestsoilgravimet

9、ricwatercontentofPhyllostachysheterocyclavarpubescensforestonthebudsproutperiodistypeA，thesecondistypeB，thelastistypeDThetypeBchangessmoothlyateachaltitudeItcanbeconcludedthatmountaintopbroadleafforestworksasacurrentstab

10、ilizer4ThesoilgravimetricwatercontentofPhyllostacJ砂Jheterocyclavarpubesc—ensforestonthebudsproutperiodoftypeA、BdecreasesgraduallywiththeincrementofmixedproportionandPhyllostachysheterocyclavarpubescensdensityTypeDhaveafe