南京椴扦插繁殖技术研究

目的]探讨南京椴嫩枝和硬枝扦插繁殖技术,为南京椴的快速繁育提供依据。方法]分别以南京椴半木质化嫩枝和硬枝作为插穗,研究不同激素（IBA、NAA、ABT）和IBA不同浓度（500、1000、2000、5000mg/kg）对南京椴嫩枝和硬枝扦插生根率的影响。结果]扦插30～40d后各激素处理陆续长出簇状嫩根,其中南京椴半木质化嫩枝扦插的生根率均比木质化枝条扦插的生根率高,嫩枝扦插平均生根数为2.6,平均根长3.1cm,硬枝扦插平均生根数为1.9,平均根长3.0cm。经激素处理后的南京椴插条生根率都高于未经激素处理的插条,其中经5000mg/kgIBA处理后的嫩枝生根率最高,达43.0%。结论]南京椴半木质化嫩枝扦插取材容易,成本低,成活率较高,有广泛的推广价值。

Research on the Propagation Technique of Tilia miqueliana Maxim.

Objective] The basis of the rapid propagation of T.miqueliana was provided through the experiment in the cutting technique of T.miqueliane shoot and hardwood.Method] The semi-lignified shoot and hardwood of T.miqueliana being taken as cutting material,the effect of the different hormones(IBA,NAA and ABT)and the different concentrations of IBA(500,1 000,2 000 and 5 000 mg/kg)on their rooting was researched.Results] The young cluster root in the cutting could be growing in the 30-40 days after hormone treatment,of which,the rooting rate of shoot was better than that of hardwood.The average rooting number of the shoot was 2.6 with the average length of 3.1 cm/root and the hardwood,1.9 with the average length of 3.0 cm/root.The rooting number of T.miqueliana cutting treated with hormone was higher than that of non-hormone treatment,and among treatments,the highest rooting rate was in the shoot cutting,treated with the IBA of 5 000 mg/kg,which was as high as 43.0%.Conclusion]The semi-lignified shoot of T.miqueliana was easy being taken as cutting with low cost and high survival rate,so the method was valuable for a wide range of application.