不同温度对白三叶种子发芽及幼苗生长的影响

Influence of Different Temperatures on Seed Germination and Seedling Growth of Trifolum repens

试验研究了温度对白三叶(Trifolum repens L.)种子发芽及幼苗生长的影响。结果表明,温度过高或过低,对白三叶发芽及幼苗生长情况均会产生影响。温度为25℃时,白三叶种子的发芽速度、发芽率和发芽势最好,株高和地上部的生物量也是最大值;当温度升高至30℃时,发芽速度显著降低,发芽势有所下降,而发芽率、株高和地上部生物量与25℃处理下无显著差异;温度低至15℃时,发芽率、发芽势、株高和地上部生物量显著下降,发芽速度与25℃处理下无显著差异。

The effect of different temperature treatments,i.e.15℃,20℃,25℃ and 30℃,on Trifolum repens seed germination and seedling growth was studied.The results showed that 25℃ was the best temperature for the seed germination and seedling growth.When higher or lower than 25℃,it would inhibit the seed germination and seedling growth.When the tem-perature was 30℃, the speed of germination would be reduced apparently and the germinability of seeds decreased, but there were not significantly difference in germination percentage, seedling height and biomass compared with 25 ℃. When it was at 15℃, the germination percentage, the germinability, the seedling height and biomass decreased significantly, but there were not significant difference in germination at the treatment of 15℃ and 25℃.