卷荚相思嫩枝扦插技术研究

对影响卷荚相思扦插生根的内、外因素研究表明:外源生根激素可显著提高扦插生根率,ATB1号生根粉的促根效果优于IBA,NAA;半封闭式扦插效果好;细砂及沙性黄土较宜作扦插基质;在不同季节扦插,其生根率没有显著差异,但生根所需时间差异显著;扦插适宜的光照强度为7 000~15 000 Lx,其间光照强度越高,插穗生根速度越快;1~5龄母树上采集的插穗生根率基本相同,但开始生根时间随母树年龄的增大而推迟,插穗木质化程度对生根的影响与母树年龄效应的影响相似.

Cuttage Experiment with Tender Cuttings of Acacia continma

The intrinsic and external influencing factors on rooting rate of Acacia continma tender cuttings were studied by systematic experiments.The following results were obtained: Plant growth regulators could significantly promote the rooting rate of the tender cuttings,ATB No.1 had better enhancing effect on rooting than IBA and NAA.The semi-closure cuttage with light,temperature and soil moisture control had higher rooting rate.Fine sand and sandy yellow soil were good substrates for A.continma cuttage.Although there was no significant difference in rooting rate among different cuttage seasons, there was difference in rooting speed.The optimal illumination intensity was between 7 000 ~ 15 000 Lx,within this scope,the higher illumination intensity,the faster rooting speed.The age of the maternal plants within 1~5 years old had about the same rooting rates,but the rooting speed slowed down along with the age increase.The effect of lignification extent of the cuttings on rooting rate and rooting speed was similar to the age effect of the maternal trees.