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对杉木双系种子园中3对兑性系的花期节律观察结果表明:无性系雌雄花各发育阶段存在明显差异。按其始花期早晚、花期长短将无性系划分为几种花期类型,大部分成对无性系雌雄花期基本一致。文中还列举了采用人工辅助授粉和调整花期的方法。
The results of flowering rhythms of three reciprocal lines in the Chinese fir two-line seed orchard show that there are significant differences in the development stages of male and female flowers in clones. According to their initial flowering period, the flowering period will be divided into several types of flowering clones, most of the paired clones of male and female flowering basically the same. The article also lists the use of artificial pollination and adjust the method of flowering.