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1、安徽农业大学学报,2017,44(4):630-635JournalofAnhuiAgriculturalUniversity[DOI]10.13610/j.cnki.1672-352x.20170811.028网络出版时间:2017/8/1112:06:59[URL]http://kns.cnki.net/kcms/detail/34.1162.S.20170811.1206.056.html闽楠天然次生林树种间联结性分析12322*242游晓庆,潘萍,彭诗涛,臧颢,欧阳勋志,宁金魁,黎芳,曹梦(1.上饶市林业科学研究所,上饶334000;2.江西农业大学林学院,南昌33
2、0045;3.吉安市林业局,吉安343000;4.中国林业科学研究院亚热带林业实验中心,分宜336600)2摘要:应用方差比率法、2×2列联表的χ检验以及Spearman秩相关系数对闽楠天然次生林重要值较高的15个主要树种进行联结性分析,同时对目的树种闽楠不同生长期与其他乔木层树种进行关联性分析。结果表明:(1)物种间总体关联性检验表明15个树种总体种间呈不显著正关联,种间联结较为松散,树种的分布有一定的独立性;105个种对的正负关联比为0.91,检验显著率为9.52%。(2)林分中闽楠大树(20cm≤DBH)、中树(10cm≤DBH<20cm)、小树(5cm≤DBH<10
3、cm)与其他乔木层树种所形成的105个种对的正负关联比分别为0.86、0.76和0.69,其检验显著率分别为11.43%、8.57%和5.71%,均表现为大树>中树>小树,种间联结较为松散,群落处于不稳定发展阶段。关键词:闽楠;天然次生林;种间关联;相关分析中图分类号:S757.2文献标识码:A文章编号:1672352X(2017)04063006InterspecificassociationofPhoebebourneinaturalsecondaryforest12322242YOUXiaoqing,PANPing,PENGShitao,ZANGHao,OUYAN
4、GXunzhi,NINGJinkui,LIFang,CAOMeng(1.ShangraoCityForestryResearchInstitute,Shangrao334000;2.CollegeofForestry,JiangxiAgriculturalUniversity,Nanchang330045;3.Ji’anCityForestryBureau,Ji’an343000;4.ExperimentalCenterforSubtropicalForestry,ChineseAcademyofForestry,Fenyi336600)Abstract:Weanalyze
5、dtheassociativityof15maintreespeciesthathaveahigherimportantvalueinthe2Phoebebourneinaturalsecondaryforestusingthevarianceratio(VR)test,χ-testfor22contingencytableandSpearman'srankcorrelationcoefficient.Meanwhile,weexploredthecorrelationbetweenPhoebebourneifromdifferentgrowingperiodsandot
6、hertreelayerspecies.Themainresultswereasfollows:(1)Theoverallasso-ciationshowednosignificantlypositivecorrelationamongthe15treespecies,whichmeantthatmostofthespe-ciesinthecommunityweredistributedindependently.Theratioofpositivetonegativeassociationof105treespecies-pairswas0.91withasignific
7、antrateof9.25%.(2)Usingdiameteratbreastheight(DBH),Phoehebourneiwasdividedintothreegrowthperiodssuchasbigtree(DBH≥20cm),middletree(10cm≤DBH<20cm)andsmalltree(5cm≤DBH<10cm).TheratioofpositivetonegativeassociationbetweenPhoehebourneiinthreegrowthperiodsandother1