Abstract
To understand the natural regeneration of manchurian ash and the seed banks under various secondary stands, we have investigated the seed quantity and vitality of major trees in the ground floor of the stands. In natural secondary stands and dahurian larch plantations with seed source of manchurian ash around them, the vital seed numbers of valuable trees (mono maple, manchurian ash, amur linden, manchurian linden, manchurian walnut) are 20933 / ha and 18000/ha respectively. The numbers of manchurian ash seeds arc 11000/ha and 12133/ha respectively. It has been found that litter affects the seedling recruitment of manchurian ash. When the seeds were sown on the litter and under the litter respectively, the final seedling recruitment rates were 17.9 and 28.9% respectively. The peak of seedling recruitment in the former case occurred one year later.
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