雨豆树播种前预处理对种子发芽和种苗发育的影响

播种前对雨豆树(Albizia saman (Jacq.) F. Muell.)的种子进行了5 种预先处理,研究种子预先处理对种子发芽和苗圃种苗发育的影响。实验是在孟加拉吉大港大学林业与环境研究所的苗圃进行。研究结果表明,在种子末端修剪(处理4)提高种子发芽率50%,在冷水中浸泡24 小时(处理1)提高种子发芽率42%,在开水中浸30 秒后再在冷水中浸泡24 小时(处理2),种子发芽完全被抑制。处理4 和处理1 的种子发芽率、种苗初期形态生长和生物量都明显高于对照组。因此,这2 种播种前的种子预处理方法,可用于提高雨豆树种子发芽率和促进早期壮苗生长。图2 表3 参30。

Effect of pre-sowing treatments on germination and initial seedling development of Albizia saman in the nursery

Albizia saman (Jacq.) F. Muell. commonly known as rain tree seeds were treated with five pre-sowing treatments to study the effect of pre-sowing treatments on germination and initial seedling development in the nursery. The experiment was established in the nursery of the Institute of Forestry and Environmental Sciences, University of Chittagong, Chittagong, Bangladesh. Results revealed that Nail clipping in one side of the seed (at the distal end of the seed) (T4) provides the highest (50%) seed germination. The second highest germination (42%) was obtained for the seeds treated with immersion in cold water for 24 h (T1). Germination was completely inhibited when the seeds immersed in boiled water for 30 s followed in cold water soaking for 24 h. Other germination parameter and initial mor- phological growth and biomass production of the seedlings was also higher for the treatments T4 and T1 in comparison to the control (T0) treatment. Pre-sowing treatments of T4 e.g. Nail clipping in one side of the seed (at the distal end of the seed) and T1 (Seeds immersed in cold water for 24 h) may be recommended for maximum germination and initial vigorous seedlings growth of Albizia saman in the nurs- ery.