MANCHURIAN ASH SEED BANK AND SEEDLING RECRUITMENT

To understand the natural regeneration of manchurian ash and the seed banks undervarious secondary stands,we have investigated the seed quantity and vitality of major trees in theground floor of the stands.in natural secondary stands and dahurian larch plantations with seedsourcc 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 and18000/ha respectively.The numbers of manchurian ash seeds are 110OO/ha and 12133/harespectively.It has been found that litter affects the seedling recruitment of manchurian ash.Whenthe seeds were sown on the litter and under the litter respectively,the final seeding recruitment rateswere 17.9 and 28.9％ respectively.The peak of seedling recruitment in the former case occurred oneyear later.