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通过对灰楸不同时期采集的楸吊、种子特征的观测及种子发芽试验,研究了不同采种期灰楸种子的品质和种子活力,为合理确定灰楸种子的采收期提供科学依据。结果表明:随采种期的变化,灰楸楸吊的鲜重、出种率、千粒重发生规律性变化。不同采种期灰楸种子的出种率、楸吊鲜重、千粒重、发芽率、发芽势、活力指数、发芽指数随采种期的变化差异极显著,不同单株间楸吊的鲜重、长度、粗度、出种率、发芽率、活力指数有极显著差异。10月底到11月中旬采集的灰楸楸吊出种率、千粒重、种子发芽率、活力指数、发芽指数最高,分别为17.5%、6.79、89.43%、35.67、3.73。表明10月底到11月初是天水地区灰楸采集的最佳时期,是适宜的采种期,采种时间越提前,品质越差。不同方位的种子发芽率有显著差异。
Through the observation of Catalpa bungei, the characteristics of seed and the germination test of Catalpa bungei collected from different periods, this paper studied the seed quality and seed vigor of C. bungei at different seeding times, and provided a scientific basis for the reasonable determination of harvest time. The results showed that the fresh weight, the seed rate and the 1000-grain weight of Torreya jackii were changed regularly with the changes of the seedling stage. The results showed that there was significant difference in the seed germination rate, fresh weight per hanging, fresh weight per thousand, germination rate, germination energy, vigor index and germination index with the seed-picking stage in different seed-maturing periods. The fresh weight, length, Roughness, seed rate, germination rate, vitality index have very significant differences. The germination rate, 1000-grain weight, seed germination rate, vitality index and germination index of Torreya jackii collected from the end of October to the middle of November were the highest, which were 17.5%, 6.79,89.43%, 35.67 and 3.73 respectively. Show that the end of October to early November is the best time to collect the collected P. sojae in Tianshui area, which is the suitable seed-picking period. The earlier the harvesting time, the worse the quality. The seed germination rate of different orientations is significantly different.