不同生长素处理条件下杂种落叶松生根力变异.pdfVIP

第45卷 第 9期 林 业 科 学 Vo1．45．No．9 2009年 9月 SCIENTIA SILVAE SINICAE Sep．，2009 不同生长素处理条件下杂种落叶松生根力的变异 孙晓梅 赵海祥 宁延龙 王军辉 王笑山。王玉芝 (1．中国林业科学研究院林业研究所 国家林业局林木培育重点实验室 北京 100091；2．河北省隆化县茅荆坝林场 隆化 068150) 关键词 ： 杂种落叶松 ；IBA；浓度 ；处理时间；生根力；遗传变异 中图分类号 ：$723．132；$718．46 文献标识码 ：A 文章编号 ：1001—7488(2009)09—0142—05 EffectsofAuxinontheRootingAbilityofHybridLarch Cuttings SunXiaomei ZhaoHaixiang2 NingYanlong2 WangJunhui WangXiaoshan WangYuzhi (1．KeyLaboratoryofTreeBreedingandCultivationofStateForestryAdministration Researchlnst~ eofForestry，CAF Bering100091； 2．MaoJingbaForestFarm，Longhua，HebeiProvince Longhua068150) Abstract： Five5．5一year-oldhybridfamiliesseedlingortetsinlarchnurseryofMaojingbaforestfarm，HebeiProvince，were usedasregeneratingmaterialsinthisexperiment，theeffectofIBA concentrationandsoakingtimeonrootingofsemi—hardwood cuttingsofhybrid larchand theresponseofdifferenthybrid familiesto auxin treatmentwere systematically studied，and the geneticparametersofrootingunderdifferentauxintreatmentswereestimated．TheresultsshowedthatsuitableIBA treatmenthad anobviouseffecton acceleratingrootingandrootdevelopmentofhybrid larch cuttings．Rootingpercentage increasedwith enhancingIBA concentrationorextendingsoakingtime，butdecreasedwhenreachingacertainconcentrationandsoakingtime． TherootnumberincreasedwithenhancingIBA concentrationorextendingsoakingtime，however，one—sidedrootingpercentage hadreversetrend．Rootingpercentageandrootdevelopmentof kaempferi73—2×Hybrid93—16werebetterthanotherhybrid families．thepercentageofrootedcuttingwasupto94％ andmeanrootnumberpercuttingwas5．3by200mgL‘ IBA soaked with20min．ThefollowinghybridfamilywasL．kaempferi12×L．gmelinii9，whosepercentageofrootedcuttingwasupto 87％ andmeanrootnumberpercuttingwas4．8by4