罗田垂枝杉不同材料扦插试验研究

Study on the Rooting Ability of the Cuttings from Cunninghamia lanceolata cv. Luotian

摘要:

摘要：为探索罗田垂枝杉的无性繁殖，以大树侧枝和基部萌条及采穗圃穗条为试验材料进行扦插，分析不同材料、不同系号及不同激素处理生根差异。结果表明：20 a以上的大树Ⅱ级侧枝的扦插生根率较低，为48.11%，而Ⅰ级侧枝的扦插生根率可达65%以上；萌条扦插生根率（88.86%）要远高于优树侧枝扦插生根率（48.01%），两者差异达到极显著水平（p＜0.01），黄化未木质化穗条扦插生根率仅为6.67%，远低于其他萌条86.94%～91.67%的生根水平，不同系号间萌条生根率从51.57%～98.77%不等；激素处理的采穗圃穗条生根率都在91.57%以上，粉剂1处理后生根数量最多，与其余三种处理差异达到显著水平。可见侧枝扦插要显著差于萌条扦插，而激素处理可以有效提高扦插生根率。

Abstract:

Abstracts:Aiming to carry out research on asexual reproduction of Cunninghamia lanceolata cv.Luotian,the lateral branches of older trees and coppice shoots were used as the experimental materials,and the difference of the effect of different cuttings,clones and hormones on their rooting ability were compared.The results showed that secondary branches of the trees, which were more than 20 years old,had a low rooting rate which was only 48.11%,but the rooting rate of the lateral branches were more than 65%.The rooting rate (88.86%) of the coppice shoots was far higher than that (48.01%) of the branches of the plus trees,and there were extremely significantly different between them (p＜0.01).The rooting rate of the non-lignification cuttings was only 6.67%,far lower than the rooting level (86.94%～91.67%) of the others.The rooting rate of the coppice shoots from different clones was from 51.57% to 98.77%.The rooting rate of the cuttings treated by hormone was more than 91.57%，and the cuttings treated by powder 1 had the largest number of roots,and there was obviously different between the method and the other treatments (p＜0.05).In general,the cuttings of branches were significantly better than that of coppice shoots,and the rooting rate of cuttings could be improved effectively by hormone treatment.