三角梅绿色嫩梢的花泥扦插繁殖技术初探

Preliminary Study of Cutting Propagation on Floral Foam of Young Greening Shoot in Bougainvillea spp.

摘要:

为了解决三角梅 Bougainvillea spp.新优品种繁殖难题，利用花泥进行6个品种的绿色嫩梢扦插繁殖试验。结果表明：花泥基质和泥炭+珍珠岩（1︰1）基质中的绿色嫩梢的生根率没有显著差异，但均极显著高于珍珠岩和木屑基质中的。IBA处理对绿色嫩梢扦插有明显促根作用，浓度可用100～300 mg/L。不同品种间扦插生根有显著差别，‘塔紫’生根率最高（100%），其后依次为‘斑叶塔紫’（95.0%）、‘樱花’（72.0%）、‘金边大红’（71.0%）、‘银边浅紫’（61.0%）和‘金心双色’（54.0%）。扦插时间宜选择在6月底至8月初，该时段的扦插生根率极显著高于10月中旬。花泥扦插生根苗的移栽成活率为100%。

Abstract:

In order to solve the difficult problem of propagation of new superior cultivars of Bougainvillea spp., the young greening shoot cutting propagation of 6 cultivars are carried out by using floral foam. The results show that the rooting rate of young greening shoots of Bougainvillea spp. in floral foam matrix and peat + perlite (1:1) matrix are not significantly different, but both are significantly higher than that in perlite and sawdust matrix. Indolebutyric acid (IBA) has obvious rooting effect on greening shoots cuttings, and the concentration can be used from 100 to 300 mg/L. There are significant differences in rooting among different cultivars. The rooting rate of ‘Pixie Pink’is the highest (100%) , followed by‘Pixie Pink Variegata’(95.0%) ,‘Imperial Delight’ (72.0%), ‘Raspberry Ice’(71.0%), ‘Mrs. Eva Mauve Variegata’(61.0%), and ‘Thimma’ (54.0%). The best time for cutting is from the end of June to the beginning of August, and the rooting rate of cutting in this period is significantly higher than that in the middle of October. The survival rate of seedling transplanting with floral foam matrix is 100%.