广西植物2016，Vol.36Issue(12)：1468-1475,8.DOI:10.11931/guihaia.gxzw201504007
IBA浓度、扦插时间对江西杜鹃和 百合花杜鹃扦插生根的影响
Effects of IBA concentration and cutting time on rooting of Rhododendron kiangsiense and Rh. liliiflorum cuttings
摘要
Abstract
To find out the best IBA concentration and cutting time for rooting of Rhododendron subsect. Maddenia (Hutch.) Sleumer cuttings, we studied the effects of four IBA concentrations and four cutting time on rooting of cuttings of Rhododen-dron kiangsiense and Rh. liliiflorum, using soil + sand (1 : 1) and peat + perlite + vermiculite (3 : 1 : 1) as rooting media. The results showed that IBA concentration had significant effects on most parameters except for retention number of old leaves. Cuttings treated with 100 mg·L-1 IBA had the highest rooting rate and length of new shoot and the lowest rotting rate, with good performance of other parameters, and that was the optimum IBA concentration for rooting. Followed by 50 mg·L-1 IBA, cuttings had the highest root width and new shoot rate but the lowest number of adventitious root. The solution of 200 mg·L-1 IBA could promote the development of root, but it gave a low rooting rate and significantly inhibited the de-velopment of new shoot. The contrast had the worst effects on rooting. Cutting time had significant effects on all rooting pa-rameters, and early spring (April 18th) with hardwood cuttings was the optimum cutting time, which gave excellent effect on most parameters except retention number of old leave, followed by autumn (October 19th) with cuttings transforming from semi-hardwood to hardwood. And summer with softwood cuttings (June 21st) or semi-hardwood cuttings (August 16th) had the worst effects, so that was not suitable for cutting propagation. Species and rooting medium also had significant effects on rooting parameters, such as Rh. liliiflorum had better rooting capacity than Rh. kiangsiense, and peat+perlite+vermiculite (3: 1: 1) was better than soil+sand (1: 1). This study found for the first time that using hardwood cuttings in early spring before new shoots sprouting could significantly promote rooting of these two species cuttings, and that pro-vides the information for cutting propagation of Rhododendron subsect. Maddenia species.关键词
江西杜鹃/百合花杜鹃/IBA浓度/扦插时间/生根效果Key words
Rhododendron kiangsiense/Rh. liliiflorum/IBA concentration/cutting time/rooting effect分类
农业科技引用本文复制引用
王书胜,张雅慧,邹芹,单文,李晓花,张乐华..IBA浓度、扦插时间对江西杜鹃和 百合花杜鹃扦插生根的影响[J].广西植物,2016,36(12):1468-1475,8.基金项目
国家国际科技合作项目 (2007DFA31410, 2014DFA31720) （2007DFA31410, 2014DFA31720）
"赣鄱英才555工程"领军人才培养计划项目 （）
江西省主要学科学术与技术带头人培养计划项目(2010DD00500) [Supported by the International S & T Cooperation Project of China (2007DFA31410,2014DFA31720) （2010DD00500）
"555 Project for Gan Po Talents" of Leading Talent Trainning Program （）
Jiangxi Provincial Training Program for S & T Leaders in Main Subjects (2010DD00500)]. （2010DD00500）
