Abstract: The result of the growth survey about 3.2 year-old regeneration forest stand of Eucalyptus urophylla × E.grandis in different treatments showed that transplanting seedlings regeneration forest stand average breast diameter is 6.8% more than sprout regeneration's and the average single-tree volumeoftransplanting seedlings regeneration is 11.4% more than that of sprout regeneration. Sprout regeneation forest stand average breast diameter decreases with the increase of reserved density. In different density treatments, differencesin sprout regeneration forest stand average breast diameter of Eucalyptus urophylla × E.grandis are remarkable according to variance analysis. Sprout regeneration forest stand average single-tree volume decreases with the increase of reserved density. Sprout regeneration forest stand average single-tree volume inthe reserved density of 1110·hm^-2 is 26.5% less than that in 2100·hm^-2. In the same density of 1110·hm^-2, transplanting seedlings regeneration forest stand volume per hectare is 23.1 % more than sprout regeneration's. Sprout regeneration forest stand volume per hectare increases with the increase of reserved density, and forest stand volume per hectare in forest stand density of 2100·hm^-2 is 53.7% more than that in 1110·hm^-2.

Key words: plantation forest, sprout regeneration, transplantingseedling regeneration, E.grandis×E.urophylla