吲哚丁酸和萘乙酸对黄花槐嫩枝扦插的影响

Effects of Indole Butyric Acid(IBA) and Naphthalene Acetic Acid(NAA) on Softwood Cutting of Cassia surattensis Burm.f.

[目的]为快速扩繁黄花槐提供理论依据。[方法]以生长健壮、无病虫害2年生黄花槐的半木质化枝条为材料,以清水处理为对照,研究250、500、1 000 mg/L吲哚丁酸(IBA)和250、500、1 000 mg/L萘乙酸(NAA)处理对枝条成活率、株高、平均生根数及根长的影响。[结果]IBA和NAA处理后的枝条扦插成活率、株高、生根数和根长均高于对照,不同浓度IBA处理的枝条成活率均高于NAA处理。500 mg/L IBA处理的枝条成活率最高(比对照高20%)、成活枝条的株高最高(33.5 cm,较对照高15.87 cm)、生根数最多(13.13条)、根最长(14.53 cm,较对照长195.93%)。[结论]IBA和NAA处理均可提高黄花槐扦插枝条的成活率、株高、生根数和根长,其中500 mg/LIBA处理的效果最好。

[ Objective] The aim was to provide the theoretical basis for fast propagation of Cassia surattensis Burro. f.. [ Method] With semilignified branches of 2-year-old C. surattensis, that haleness and no diseases and pests as the materials, and treatment with clean water as CK, the effects of 250, 500, 1 000 mg/L indole butyric acid （IBA） and 250, 500, 1 000 mg/L naphthalene acetic acid（NAA） on survival rate, plant height, average rooting number and root length of shoot were studied. [ Result] The survival rate, plant height, average rooting number and root length of branches in treatment with IBA and NAA were all higher than those of CK, and the survival rate of branches in treatments with IBA at different concn, were all higher than that in treatment with NAA at different concn. In the treatment with 500 mg/L IBA, the survival rate of branches was the highest （ being 20% higher than that of CK）, the plant height of survival branches was the highest （33.5 cm, and being 15.87 cm higher than that of CK）, and the root length was the longest （ 14.53 cm, being 195.93% longer than that of CK）. [ Conclusion] Treatments with IBA and NAA all could improve the survival rate of branches, plant height, average rooting number and root length of cutting branches of C. surattensis, and the treatment effect with 500 mg/L IBA was the best.