本文对华北落叶松花粉生活力 ,花粉量和花粉萌发进行了测定 ,结果表明 ,华北落叶松散粉从开始到结束需 1 7d左右 ,可分三个时期 ,散粉初期、散粉盛期、散粉末期。在散粉盛期花粉生活力最高 ,达 93 5 % ,平均每个小孢子叶球花粉量最大 ,达 1 1 85 。用不同浓度的蔗糖培养基进行花粉萌发试验表明 ,用 5 %的蔗糖培养基培养花粉 ,效果最好 In this paper, the pollen viability, pollen amount and pollen germination of Larix principis-rupprechtii were determined. The results showed that the larch pollen powder was about 17 days from the beginning to the end, which could be divided into three periods: initial stage, loose stage and loose stage. The highest pollen viability was found in the flourishing period, reaching 93.5%. The average amount of pollen per microspore was the highest, reaching 1 1 85. Pollen germination experiments with different concentrations of sucrose medium showed that 5% sucrose medium was the best for cultivating pollen