The increment percentages of DBH for stand densities 3 300, 4050,4800 and 5550 trees per hectare were 3.43%, 2.85%, 2.64% and 2.56% respectively, with contrasts of 240.00%, 207.00%, 191.00% and 186.00% respectively.

• 间伐后立木保存密度为3300株/hm~2；4050株/hm~2；4800株/hm~2和5550株/hm~2的4a胸径增长率分别为3.；43%25；2