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探讨不同发育时期水曲柳种子的外部形态和生理变化及其层积处理后的萌发效应结果表明:水曲柳开花120d后为成熟脱水阶段,开花110d后种子的胚长和胚乳干重趋于稳定,花后110～120d期间种子胚干重趋于稳定;花后70～100d采集的种子不耐层积,层积处理后逐渐死亡,花后110d采集的种子经层积处理后可以萌发;110d后采集的水曲柳种子经暖温(20℃)16周+低温(5℃)12周的层积处理后,其休眠破除的效果较好,适当延长暖温层积时间有利于提高种子萌发率。
The morphological and physiological changes of the seeds and the germination effects after stratification were investigated in different developmental stages. The results showed that the mature stage of the mature stage was 120 days after flowering, the embryo length and dry weight of endosperm tended to be Stable, the seed embryo dry weight tended to be stable during the period of 110-120 d after anthesis; the seeds collected after 70-100 d after flowering were intolerant of stratum, gradually died after stratification treatment, and seeds collected 110 days after anthesis could germinate after stratification treatment; After 110 days, the seeds of Fraxinus mandshurica collected after 12 weeks of warm temperature (20 ℃) for 16 weeks + low temperature (5 ℃) for 12 weeks, the effect of dormancy breaking was better. Germination rate.