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1、楸树无性系生长和生理特性研究摘要：通过对楸树(CatalpabungeiC.A.Mey)19个杂种无性系生长、生理指标进行比较分析，将为楸树优良无性系的选育提供科学依据。试验结果表明，不同楸树无性系的树高、叶长、叶宽、长宽比及叶柄长度差异极显著，胸径、叶绿素含量SPAD值差异显著；树高与叶绿素含量SPAD值和比叶重呈极显著正相关，胸径与叶长和叶宽呈显著正相关，与叶绿素含景SPAD值呈极显著正相关；根据树高、胸径和叶绿素含量SPAD值3个指标，对19个楸树无性系进行聚类分析，结果无性系9-1、07-5-8-17、07-Y27-4和07-5-8-20较为优良。本文采集自网络，本站发布的论文均是优质
2、论文，供学习和研宄使用，文中立场与本网站无关，版权和著作权归原作者所有，如有不愿意被转载的情况，请通知我们删除己转载的信息，如果需耍分享，请保留本段说明。关键词：楸树(CatalpabungeiC.A.Mey)；无性系；生长；生理中图分类号：S792.99+7文献标识码：A文章编号：0439-8114(2016)22-5858-06D0I：10.14088/j.cnki.issn0439-8114.2016.22.034StudyonGrowthandPhysiologicalCharacteristicsofCatalpabungeiClonesJIAOYun-del,ZIIAOYan2,Z
3、IIAOKunl,WANGJun-hui3,ZHANGJian-xiangl,YANGYan-hongl,CHENXin-yul(1.LuoyangAcademyofAgricultureandForestrySciences,Luoyang471023,Henan,China；2.HenanUniversityofScienceandTechnology,Luoyang471003，Henan,China；3.ChineseForestryScienceInstitute,InstituteofForestry/TheStateForestryAdministrationCultivatin
4、gkeyLaboratoryofTrees，Beijing100091,China)Abstract:ToprovideascientificbasisforchoosingsuperiorCatalpabungeiC.A.Meyclones,thegrowthandphysiologicalindexesof19C.bungeicloneswerestudiedandanalyzed.Themainresultsshowedthatthereweresignificantdifferencesintreeheight,leaflength,leafwidth，aspectratioandpe
5、tiolelength,andobviousdifferencesindiameteratbreastheight(DBH)andchlorophyllSPADvalueofdifferentC.bungeiclones.TherewasverysignificantpositivecorrelationbetweentreeheightandchlorophyllSPADvalue,specificleafweight.TherewassignificantpositivecorrelationbetweenDBHandleaflength,leafwidth,very-significan
6、tpositivecorrelationbetweenDBHandchlorophyllSPADvalue.Takingthreeindexesincludingtreeheight，DBHandchlorophyllSPADvalue,9-1,07-5-8-17，07-Y27-4and07-5-8-20cloneswereexcellentaccordingtoalusteranalysison19C.bungeiclones.Keywords:CatalpabungeiC.A.Mcy；clone；growth；physiology楸？洌？CatalpabungeiC.A.Mey)属紫葳科(
7、Bignoniaceae)梓树属(CatalpaScop.)，是中国特存的珍贵用材和观赏树种，它材质优，用途广，适应性强，造林成活率高；在中国己经有二千多年的栽培历史，自古素有“木王”之美称［1］。正是因为楸树的优良特性，造成了人类对楸树的超限开发利用，长期的择优采伐使楸树资源面临严重枯竭的境地，现在木材市场上楸树短缺，而森林里材种比例失调，林种结构不合理，进而危及到自然生态平衡［2］。为确保楸树
