温度和光照对青冈栎和浙江樟种子萌发的影响

目的]研究不同温度和光照对青冈栎和浙江樟种子萌发的影响。方法]计算青冈栎和浙江樟种子的千粒重并观察其形态特征。研究4种温度处理和3种光照时间对种子萌发的影响。结果]在15～30℃范围内,青冈栎和浙江樟种子的发芽率呈现先上升后下降的趋势;青冈栎种子在黑暗条件下其发芽势和发芽率显著低于光照条件,浙江樟种子在光照和黑暗条件下萌发率都超过了75%。结论]青冈栎的最适宜萌发温度为25℃,而浙江樟则为20℃;青冈栎种子萌发需在有光条件下进行,在黑暗中萌发受抑制,浙江樟种子在黑暗和光照条件下均能萌发,但是12 h的光照可以明显提高其种子发芽率。

Effects of Temperature and Light on Seeds Germination of Cyclobalanopsis glauca and Cinnamomum chekiangense

Objective]The effects of temperature and light on seeds germination of Cyclobalanopsis glauca and Cinnamomum chekiangense were studied.Method] The thousand seed weight of Cyclobalanopsis glauca and Cinnamomum chekiangense were calculated and morphological specificity were observed.The effects of 4 kinds of temperature and 3 kinds of uminous intensity on seeds germination were studied.Result] Germination percentage of Cyclobalanopsis glauca and Cinnamomum chekiangense showed increased firstly and then decreased in 15-30 ℃.Germination potential and germination percentage of Cyclobalanopsis glauca in the dark conditions were significantly lower than the illumination conditions,germination percentage of Cinnamomum chekiangense seeds exceeded 75% in the dark and illumination conditions.Conclusion]The best suitable germination temperature for Cyclobalanopsis glauca was 25 ℃ and 20 ℃ for Cinnamomum chekiangense.Light was a prerequisite for germination of Cyclobalanopsis glauca,and the seed germination was restrained in the dark treatment.The seed of Cinnamomum chekiangense can germinate both in the light and dark,but 12 hours treatment of light obviously enhanced the percentage of its germination.