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1992年4月末在黑龙江省林口县青山林场种子园进行试验研究,其结果表明:长白落叶松散粉历时8d左右,主要集中在第2～5d。种子园内每天的散粉量除了与各无性系植株的雄球花发育程度及散粉量有关外,还与环境因子有关,早晚散粉量主要受温湿度的控制,到9时后随着气温升高,散粉量还受风速的影响。一天内的散粉量主要集中于9～15时。花粉密度的空间立体变化,在垂直方向由高到低呈现由小到大的变化趋势;在水平方向上花粉分布也不均匀,在5个区中,第2、4区明显高于其它3个区。
At the end of April 1992, the experiment was conducted in the Qingshan Forest Farm in Linkou County, Heilongjiang Province. The results showed that the powdery larch powder lasted for about 8 days and mainly concentrated on the 2nd to 5th days. Seed powder in the park every day except with the clonal male sterile flower plant development and the amount of scattered powder, but also with the environmental factors, sooner or later scattered amount of powder mainly by temperature and humidity control, to 9:00 with the temperature rise , Loose powder is also affected by the wind speed. The amount of loose powder in a day mainly concentrated in 9 ~ 15 o’clock. The three-dimensional spatial variability of pollen density showed a small to large variation trend from high to low in the vertical direction. The pollen distribution in the horizontal direction was also uneven. Among the five regions, the 2,4 and 4 regions were significantly higher than the other three Area.