筇竹种子萌发及温度对幼苗生长的影响

Effect of temperature on seed germination and seedling growth of Qiongzhuea tumidinoda

为了探究温度对筇竹种子萌发及幼苗生长的影响,以筇竹种子为试验材料,设定了16~30℃共8个梯度恒温温度处理,对筇竹种子萌发以及幼苗生长的指标进行观测。结果表明,温度对筇竹种子萌发及幼苗生长有着显著的影响。随着温度的升高,种子发芽率先升高后降低,20℃温度下发芽率最高(79.44%),20~24℃下种子萌芽率差异不显著,是筇竹种子萌发的最适温度区间;幼苗生长速率随温度的增加先增快后减慢,24℃温度下生长最快,24和26℃下幼苗的生长高度以及胚根生长长度差异不显著,是筇竹幼苗生长的最适温度区间。温度过高或过低均抑制种子的萌发及幼苗的生长。

In order to explore the effect of temperature on seed germination and seedling growth of Qiongzhuea tumidinoda bamboo, we took Q. tumidinoda bamboo seed as the test material, and set up a total of 8 temperature gradients from 16℃ to 30℃ for seed germination test. The results showed that temperature had a significant effect on the seed germination and seedling growth of Q. tumidinoda. With the increase of temperature, the seed germination rate increased firstly and then decreased. The germination rate was the highest (79.44%) at 20°C. There was no significant difference in seed germination rate between 20°C and 24°C, which was the optimum temperature range for the seed germination of Q. tumidinoda. The growth rate of seedlings increased firstly and then decreased, it growing fastest at 24℃,and there was no significant difference in seedling growth height and radicle growth length at 24℃ and 26℃, which was the optimum temperature range for the growth of seedlings of Q. tumidinoda. Too high or too low temperature would inhibit the seed germination and seedling growth of Q. tumidinoda.