生长调节剂对5个白蜡属新品种嫩枝扦插的影响

Effects of Growth Regulators on Softwood Cutting of Five New Varieties of Fraxinus

为实现白蜡属植物优良品种的规模化生产,以5个白蜡属植物新品种当年生半木质化嫩枝为材料,采用随机区组试验方法,研究IBA、ABT1、NAA 3种植物生长调节剂对嫩枝扦插的影响。结果表明,品种不同所适用的处理也不同。利用隶属函数法对各品种扦插苗的生根率、总根数及不定根长进行综合评价,1号处理(200 mg/LIBA浸泡20 min)最适于‘金箭’和‘盐蜡’嫩枝扦插育苗,3号处理(200 mg/L ABT1浸泡20 min)最利于‘鲁蜡5号’,4号处理(1000 mg/L ABT1浸泡1 min)最适用于‘青碧’,而‘华雄’则最适合用5号处理(200 mg/L NAA浸泡20 min)。对5个白蜡新品种的扦插苗各指标进行比较,不同品种间的生根率、总根数及不定根长之间的差异均达极显著水平,其中平均生根率由高到低为‘盐蜡’>‘青碧’>‘金箭’>‘华雄’>‘鲁蜡5号’;总根数以‘青碧’最多,平均总根数为13.1条;不定根长以‘鲁蜡5号’最长,为9.4 cm。

To realize the large-scale production of excellent varieties of Fraxinus, the effects of three kinds of plant growth regulators, IBA, ABT1 and NAA, on the softwood cutting of five new varieties of Fraxinus were studied by using the random block test method. The results showed that different treatments were suitable for different varieties. The rooting rate, total root number and adventitious root length of cutting seedlings of various varieties were comprehensively evaluated by membership function method, and the results showed that treatment No.1(soaking in 200 mg/L IBA for 20 min) was most suitable for ’ Jinjian ’ and ’ Yanla ’ , treatment No.3(soaking in 200 mg/L ABT1 for 20 min) was most suitable for ’ Lula Wuhao ’ softwood cutting, treatment No.4(soaking in 1000 mg/L ABT1 for 1 min) was most suitable for ’ Qingbi ’ , and treatment No.5(soaking in200 mg/L NAA for 20 min) was most suitable for ’ Huaxiong ’ . The cutting seedling indexes of the five new varieties of Fraxinus were compared and the results showed that the differences of rooting rate, total root number and adventitious root length among different varieties were very significant. The order of average rooting rate from high to low was ’ Yanla ’ > ’ Qingbi ’ > ’ Jinjian ’ > ’ Huaxiong ’ > ’ Lula Wuhao ’;the total root number of ’ Qingbi ’ was the most, which was 13.1;the adventitious root length of ’ Lula Wuhao ’ was the longest, which was 9.4 cm.