【摘要】 巨尾桉二代萌芽更新林地清理方式试验研究结果表明 ,巨尾桉二代萌芽更新的林地清理方式以不炼山且伐桩不覆盖处理为最好 ,与炼山的处理方式相比 ,该模式不但有利于伐桩早萌芽且萌芽率高 ,而且林分径高比例较为协调 ,抗风能力强 ;不炼山的林地采伐剩余物多 ,白蚁食物丰富 ,伐桩及萌芽条基本不受白蚁危害 ,更新效果较为理想 ,2 6 5个月林分有效株数、萌芽率、平均树高和胸径分别达 3 2 1 7条·hm- 2 、81 0 4%、7 3 0m和 6 2 0cm ;实行不炼山 ,采伐剩余物的腐烂分解将使腐殖质增多 ,利于地力的维持。不论从经济还是生态角度出发 ,巨尾桉二代萌芽更新应采用不炼山伐桩不覆盖处理方式。更多还原

【Abstract】 In the expriments for forests land clearance ways of Eucalyptus grandis×E.urophylla second-generation sprout regeneration stand, non-burning and non-covering stump treat was the best, comparing with control burning, the non-buring was propitious to sprout early and the ratio of sprout was high, the proportion of DBH and height was harmonious, and was strongly resistant to wind. Simultaneously, logging slash of forest land and the food of termite were both rich, so the stump and stump plant were not harmed by termite, and the tree number, ratio of sprout, height and DBH is 3 217 tree·hm -2、81.04%、7.30*!m and 6.20*!cm respectively in 26.5 months. Because of non-buring, logging slash decomposed and humus increased, effect of soil fertility maintenance was better. Therefore, from the angle of economy and ecology, E.grandis×E.urophylla second-generation sprout regeneration stand should be treated with non-burning and non-covering stump.更多还原