不同插穗规格和季节对米槁扦插生根的影响

Effect of Different Cutting Sizes and Seasons on the Cutting Rooting of Cinnamomum migao

【目的】研究不同插穗规格和季节对米槁扦插生根的影响,为米槁扦插繁殖提供科学依据。【方法】从米槁插穗的粗度(>2～3、>3～4、>4～5、>5 mm)、长度(7、l0、13、15、18 cm)和扦插的季节(3、6和9月)对扦插生根过程进行观察记录并对扦插的生根率、愈伤组织形成率、偏根率、生根数、最长不定根长等指标比较分析。【结果】(1)春秋两季扦插的愈伤组织、不定根发生较夏季迟,夏季部分插穗皮部生根,生根时间短,但腐烂数量多。(2)综合各生根性状,>3～4 mm粗的插穗生根效果最好,生根率也最高;>5 mm以上的插穗的最大根长高于其他处理。(3) 7～13 cm长的插穗除偏根率外各项生根指标均明显优于15 cm及18 cm的插穗。【结论】米槁在春季3月选取>3～4 mm粗、10 cm长的枝条进行扦插生根效果最佳。

[Purpose]To study the effect of different cutting sizes and seasons on the cutting propagation of Cinnamomum migao and to provide scientific evidence for C.migao cuttage.[Methods]The C.migao cuttings roughness(>2-3,>3-4,>4-5,>5 mm),length(7,l0,13,15,18 cm)and cutting season(March,June and September)on rooting process was recorded and the rooting rate of cuttings,rate of callus formation,partial root rate,root number and the maximum adventitious root length were studied by comparative analysis.[Results](1)The callus and adventitious root cut in the spring formed later than that cut in summer;the branches cut in summer bark rooted and the rooting time was short,but more rotten.(2)The rooting traits of>3-4 mm cuttings had the best indexes and the highest rooting rate.The maximum length of>5 mm cuttings was longer than other treatments.(3)The rooting indexes of cuttings of 7-13 cm indexes except the partial root rate were significantly better than those of the cuttings of 15 cm and 18 cm.[Conclusion]Comprehensive analysis result indicated that C.migao branches of>3-4 mm cuttings roughness and 10 cm long cutting in spring had the best rooting effect.