不同激素对黄山栾种子萌发和幼苗生长的影响

The Effect of Different Hormones on Seed Germination and Seedling Growth of Koelreuteria bipinnata var.integrifoliola

以黄山栾树种子为试验材料,研究不同浓度激素对种子萌发、幼苗生长的影响,探究不同激素对林木种子萌发及幼苗生长发育的调节作用。结果显示:不同激素处理对对黄山栾树种子发芽具有促进作用,促进作用随处理浓度的增加呈现先增强后减弱的趋势,且100 mg/L的IAA处理对种子发芽指标提高效果最佳。黄山栾树幼苗的鲜重、株高和根长均在300 mg/L的IAA处理时达到最大值,但差异并不显著。研究表明,适当浓度的激素处理不但能有效促进种子萌发,而且能改善幼苗的生长状况,进而提高绿化苗木的质量和对逆境的适应能力。

A study was carried out to investigate the effects of different hormones on seed germination and seedling growth of Koelreuteria bipinnata var.integrifoliola.It was revealed that seed germination was significantly affected by different hormones.This effect was positively correlated with low concentration but high concentration decreased germination rate and seedling growth.The seed germination rate was maximum with IAA at 100 mg/L.The fresh weight,plant height and root length of seedlings reached the maximum at the 300 mg/L treatment,which was not significant than the control.This study indicated that low concentrations of hormones not only promoted seed germination,but also improved seedling growth and might enhance the quality of greening seedlings and the resistance to adverse conditions.