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1、ChineseAgriculturalScienceBulletinVol.24No.32008Marchhttp://www.casb.org.cn·106·农业基础科学农业基础科学珍稀保护植物十齿花群落灌木种间联结性分析1,2432,3林长松,李玉英,朱万斌,程序(1六盘水师范高等专科学校生物与地理科学系，贵州六盘水553004;2中国农业大学农学与生物技术学院，北京100094；3中国农业大学生物质工程中心，北京100094；4南阳师范学院生命科学与技术学院，河南南阳473061)2摘要:运用方差比率法(VR)、X检验、种间共同出现百分率(PC)和联结系数(AC)分析
2、了贵州省六盘水市玉舍国家级森林公园十齿花群落20个优势灌木种群的种间联结性。总体关联度检验显示:20个灌木种群构成的190个种对总体上表现为显著的正关联。几项关联检验指标对十齿花群落主要灌木种群之间联结性关系检测结果表明:共同出现百分率PC和联结系数AC反映出的显著关联及完全独立的种对2数均比用X检测所得的种对数多,尤其是显著负联结的种对较为明显,但几种方法检验的结果总体上反映了大致相同的联结趋势;在总的种对数中,正联结种对数略多于负联结,呈显著和极显著关联以及完全独立的种对数所占比率较低,多数种对联结性不显著,趋于独立。关键词:十齿花;优势种群;灌木层;玉舍森林公园;种间
3、联结中图分类号:S759.992.7文献标识码:AAnalysisonInterspecificAssociationamongShrubSpeciesofRareandPreciousPlantDipentodonSinicusCommunitiesinYusheNationalForestPark,Guizhou1,2432,3LinChangsong,LiYuying,ZhuWanbin,ChengXu（1DepartmentofBiology&GeographyScience,LiupanshuiNormalCollege,Liupanshui553004;2Col
4、legeofAgronomyandBiotechnology,ChinaAgriculturalUniversity,Beijing100094;3CenterofBiomassEngineering,ChinaAgriculturalUniversity,Beijing1000944CollegeofLifeScienceandTechnology,NanyangNormalUniversity,Nanyang473061）Abstract:Basedonthe2×2contingencytable，differentindicesincludingvariancerat
5、io(VR)，W-test,2X-test,associationcoefficient(AC)andpercentageco-occurrence(PC)wereusedtodeterminetheinter-specificassociationsofthe20mainshrubpopulationsofDipentodonsinicuscommunityinYusheNationalForestParkofLiupanshui,Guizhouprovince.Thegeneralcorrelationtestshowedthattheassociationofthe1
6、90speciespairsofthe20mainshrubspeciesshowedasignificantpositiveassociationasawhole.There-sultsabouttheinterspecificassociationsofthemainshrubpopulationsofDipentodonsinicuscommunity2testedbythethreeassociationindeces,Xtest,percentageco-occurrence(PC)andassociationcoefficient(AC),showedthatt
7、hesignificantlyassociatedspeciespairsandabsolutelynon-associatedspeciespairstested2byPCandACweremorethanthatofwhichtestedbyX-test,especially,thenegativeassociationspeciespairswereofverymarkedness,whereastheseveralindecesapproximatelyreflectedthesameassociatedt
