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一、良种采集采种时,用材林的母树应选择生长迅速、发育健壮、树干通直圆满、材质优良、冠幅小的壮龄树木。采集大量优质种子,正确掌握种子的成熟期和采集期。采集过早,种子尚未成熟,发芽率低;采集过晚,种子往往会自然脱落,被风吹散难于收集或遭受鸟、兽、虫类等危害。
First, the seed collection, seedling trees should choose to grow rapidly, vigorous growth, trunk straight round, good material, small crown crown age trees. Collect a large number of high-quality seeds, correctly grasp the maturity and collection of seeds. Premature collection, the seed is not yet mature, low germination rate; too late collection, the seeds tend to fall off naturally, the wind is difficult to collect or suffer birds, beasts, insects and other hazards.