【摘要】 实验证明水曲柳1年生插穗的生根率较高,如果能利用少量有限的超级苗资源获得大量1年生萌条,则可增加插穗来源,实现利用扦插技术大量扩繁优良资源的目的。本试验以水曲柳超级苗的平茬桩(仅留1~2个侧芽)和去顶芽桩(仅摘除顶芽)为试材,采用激动素(KT)、2,4-二氯苯氧乙酸(2,4-D)、高锰酸钾(KMnO4)、三十烷醇(TA)和诱芽营养剂进行萌芽促进试验,探索获得大量的1年生萌条的途径。结果表明,对水曲柳1年生苗平茬桩,诱芽营养剂的促萌效果相对较好,其次是1 mg/L的KT和5%的KMnO4;对水曲柳1年生去顶芽桩,诱芽营养剂促萌效果较好,1 mg/L和20 mg/L的2,4-D,5 mg/L的KT、TA和2,4-D,1%和5%的KMnO4也有一定效果;对水曲柳2年生苗平茬桩和去顶芽桩,诱芽营养剂萌芽促进效果较好;对2年生苗平茬桩,0.1 mg/L的KMnO4浸泡48 h的促萌效果也较好。总体来看,诱芽营养剂对水曲柳苗桩萌芽促进的应用潜力最大。更多还原

【Abstract】 It has been proved that high rooting capacity of Fraxinus mandshurica can be obtained by taking 1-year-old seedling stems as cuttings.Therefore,it may be a useful approach for promoting rooted cutting utilization of F.mandshurica by obtaining more 1-year-old shoots from the superior seedlings,and then producing rooted cuttings from these shoots.To reproduce more and more 1-year-old shoots for rooted cuttings,sprouting promotion experiments were conducted by chemical control reagent treatment of the seedling stumps with just 1 or 2 axillary buds remained and apical-bud-removed seedlings in this paper.The chemical reagents included Kinetin(KT),2,4-Dichlorophenoxyacetic Acid(2,4-D),KMnO4,1-Triacontanol(TA) and bud inductive nutrient reagent(BINR)(made by Jiafeng Ltd.,Shanghai).The result indicated that for 1-year-old seedling stumps,the sprouting promotion effect of BINR was the best,1 mg/L KT and 5% KMnO4 treatments also had good effect.For 1-year-old apical-bud-removed seedlings,the sprouting promotion effect of BINR was the best and 1 mg/L and 20 mg/L 2,4-D,5 mg/L KT,TA and 2,4-D,1% and 5% KMnO4 treatments also had certain effect respectively.The sprouting promotion effect of BINR was the best either for 2-year-old seedling stumps or for apical-bud-removed seedlings.For 2-year-old seedling stumps,the treatment of dipping 48 h with 0.1 mg/L KMnO4 had also certain effect.Generally,BINR had the prospective potential for promoting bud sprouting of seedling stumps and apical-bud-removed seedlings of F.mandshurica.更多还原