不同基质和生根剂对彩桂扦插繁殖的影响

Effect of Compound Media and Plant Growth Regulator on the Cuttage Propagation of Osmanthus fragrans ‘Yun Tian Cai Gui’

为提高彩桂扦插繁育技术,在温室全光照喷雾条件下进行基质配方、生根剂种类、生根剂浓度3个因素3个水平的彩桂扦插育苗正交试验。结果表明：有机育苗基质组的3个因素中,除生根剂种类对生根率影响不显著外,基质配方与生根剂浓度对插穗生根影响极显著,各因素的主次顺序为基质配方〉生根剂浓度〉生根剂种类,该组彩桂扦插育苗最优方案为：有机育苗基质＋珍珠岩＋蛭石（体积比3：4：3）,用浓度为200 mg/L的绿色植物生长调节剂（GGR）处理插条2 h,生根率达到83.3%。蚯蚓粪组中基质配方和生根剂种类对生根率存在显著影响,生根剂浓度对生根率的影响不显著,主次顺序为生根剂种类〉基质配方〉生根剂浓度,该组最优方案为：蚯蚓粪＋珍珠岩＋蛭石（体积比3：4：3）,浓度为200 mg/L的GGR处理插条2 h,生根率达到80.0%,而以同期当地长江冲积土为对照的处理生根率只有20%~30%,且在验证试验中该处理彩桂生根率达到了（90.0±3.3）%。在全光照喷雾条件下,这2种方案明显提高了生根率,同时缩短了生根时间,根数量较多且生长于插穗皮部。

A cutting orthogonal experiment with 3 factors and 3 levels was conducted under full light and intermittent sprinkling to investigate the effect of compound media, type and concentration of plant growth regulators on the cutting propagation of Osmantbus [ragrans ＇Yun Tian Cai Gui＇. The results showed that in group A compound media and concentration of plant growth regulator all had extremely significant effects on rooting rate except the type of plant growth regulator. The rooting effects of these three factors on the rooting rate were： compound media〉 concentration of plant growth regulator〉 type of plant growth regulator. The best treatment of group A with the rooting rate of 83.3% was： medium under compound organic substrate： pearlite： vermiculite （3：4：3）, soaking 200 mg/L of GGR for 2 hours. And in group E, except the concentration of plant growth regulator, other two factors had extremely significant effects on rooting rate. The best treatment of group E with the rooting rate of 80.0% was： medium under wormcast： pearlite： vermiculite （3：4：3）, soaking 200 mg/L of GGR for 2 hours. However, the rooting rate of the control treatment with the cutting medium of Yangtze River alluvial soil was 20%-30%. And this was proved by the second experiment with a rooting rate of （90.0＋3.3）%. Cutting under the full light and intermittent sprinkling, these 2 methods of cutting with the roots belonging to surface root type can shorten rooting time significantly, increase rooting quantity and product good quality seedlings according to the plans screened out.