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同一株银杉的不同球果的出种量没有明显差异 ,说明就同一植株而言 ,其有性生殖是同步的 ,球果的发育程度比较接近。银杉种子的平均重量 0 .0 197g,仅为乔木树种种子平均重量的 6 %。种子中空粒比例达 16 .2 4% ,反映出较高的种子败育率 ,饱满的种子中有生活 力者仅占 5 3 .3 %。银杉种子的吸水过程有 3个明显的阶段 ,0～ 1h是急剧吸水阶段 ,1～ 9h吸水基本停滞 ,9h到 14 d吸水量又呈递增趋势。在同样贮藏条件下 ,播种环境对发芽率影响很大 ,质地疏松、透气性强的土壤有利于种子萌发 ;播种环境相同时 ,贮藏条件对种子发芽率起决定作用 ,以湿沙贮藏最好 ,种子发芽率可达 70 % ,干藏最差 ,发芽率仅 4%。
The same species of silver fir different cones out of the amount of no significant difference, indicating that the same plant, the sexual reproduction is synchronized, the development of cones is relatively close. The average weight of silver fir seed 0. 0 197g, only 6% of the average weight of the tree seed. The percentage of hollow seeds in seeds reached 16.24%, reflecting a high rate of seed abortion, with only 33.3% of those with full seeds. There are three distinct phases in the water absorption process of the silver fir seed, 0-1h is the stage of rapid water absorption, the water absorption basically stagnates after 1 ~ 9h, and the water absorption increases gradually from 9h to 14d. Under the same storage conditions, the sowing environment had a great influence on the germination rate. The soil with loose texture and strong air permeability was conducive to the seed germination. When the sowing conditions were the same, the storage conditions played a decisive role on the seed germination rate, Seeds germination rate up to 70%, dry storage the worst, germination rate of only 4%.