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.

Key words: Eucalyptus grandis×, E.urophylla, Sprout regeneration, Forest land clearance ways, Control burning, Stump covered