A Study on the Density Control of Second-generation Eucalyptus grandis × E. urophylla Stand by Sprout Regeneration

The sprouting amount kept and the tree growth, biomass and stand structure of second-generation sprout regenerated Eucalyptus grandis × E. urophylla stand were studied. The results showed that the tree growth with keeping 1～2 sprouts for each stump was better than that keeping all sprouts. The authors put forward some technical measurements for controlling stand density such as keeping proper amount of sprouting, reasonably regulating sprouting time. Taking silviculture object and site condition into account, it is suggested the proper stand density of second-generation sprout regenerated E. grandis × E. urophylla should be 1650～2500 per hectare.