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SEED GERMINATION CHARACTERISTICS OF CUPRESSUS CHENGIANA AT DIFFERENT TEMPERATURES IN MAERKANG, SICHUAN
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF APPLIED & ENVIRONMENTAL BIOLOGY
- Issue:
- 2
- DOI:
- 10.3321/j.issn:1006-687X.2005.02.004
- Key Word:
- 岷江柏;种子;温度;发芽
Abstract： 通过对不同温度下岷江柏(Cupressus chengiana S.Y.Hu)种子的发芽特征研究,分析了种子的发芽周期和最适发芽温度,以及温度对种子发芽的影响,并讨论了岷江柏的发芽特征与环境温度的关系.结果表明,种子发芽周期为20 d,其中0～5 d为准备期,5～15 d为对数期.种子发芽温度为5～30℃,适宜发芽温度为10～25℃,5℃和30℃均不利于种子发芽.在贮藏过程中,贮藏开始阶段10℃不利于种子发芽,10～25℃贮藏4～10 mo后的发芽率没有差异.种子最适发芽温度在2003年1月、4月、7月和10月分别为25℃、10℃、15℃和25℃.在不同温度下,种子发芽率没有差异,而种子发芽势和达到50%发芽的天数有显著差异.岷江柏种子的发芽周期和最适发芽温度,以及贮藏过程中的发芽特征与环境温度有着密切的关系,这是它对自然环境的一种适应表现.图3表2参30
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