柚木嫩枝扦插  

Cutting Propagation of Tectona grandis by Tube-seedling Hedges

作　　者：曾炳山[1] 裘珍飞[1] 梁坤南[1] 刘英[1] 

机构地区：[1]中国林业科学研究院热带林业研究所,广东广州510520

出　　处：《中南林学院学报》2005年第3期78-81,共4页Journal of Central South Forestry University

基　　金：中国林业科学研究院基金项目"柚木嫩枝扦插技术研究".

摘　　要：　对柚木组培苗田间扦插扩繁的主要技术开展了研究.结果表明:不同无性系的萌条数量有显著差异,高的达14.8条/月,低的5.5条/月,平均9.1条/月;从0.05～2.00mg/L,随着IBA浓度的提高,生根率、根条数、总根长等生根指标均呈现有规律的变化;综合考虑各种生根指标,以IBA0.05mg/L为最佳生根激素处理;扦插介质对柚木插穗生根有显著的影响,以泥炭土+黄心土按1∶1混合为最佳扦插介质;不同无性系的扦插成活率不同,从56.7%至90.0%,变动幅度大;随扦插季节变化,生根率和成活率均呈现有规律的变化,5～6月份的生根率中等,7～8月最高,9～10月份迅速下降,成活率随季节的变化也是两头低、中间高,6～8月的成活率最高,大于93%;综合考虑生根率、成活率和苗木生长期,5～8月份为柚木适宜的嫩枝扦插季节.<Abstrcat>This paper deals with cutting techniques of teak clones based on tube-seedlings. The twig production of different clones is different, from 5.5 twigs per month to 14.8 twigs per month. The rooting rate, root number and root length change regularly as the concentration of IBA goes up from 0.05 to 2.00 mg/L. At the concentration of 0.05 mg/L ppm IBA, rooting rate and root length are the highest. Cutting substrate also has eminent effect on rooting rate and survival rate, 50%peat plus 50% sub-top soil is the best substrate. The survival rate differs greatly among clones, from 56.7% to 90.0%. Rooting rate and survival rate change regularly as season changes. The rooting rate of May and June is middle, that of July and August is high and that of September and October drops rapidly. The survival rate is low in May, September and October and high in June, July and August. Taking rooting rate, survival rate and growing season of seedling into consideration, the period from May to August is the proper cutting season for teak.

关 键 词：柚木 嫩枝扦插 扦插成活率 生根率 主要技术 BA浓度 激素处理 插穗生根 季节变化 10月份 扦插季节 无性系 组培苗 泥炭土 6月份 生长期 8月份 指标 最佳 介质 萌条 扩繁 根条 根长 心土 苗木 

分 类 号：S792.99[农业科学—林木遗传育种] S793.605[农业科学—林学]