Abstract:The growth, biomass and calorific values of 2-year-old Eucalyptus hybrid clone DH201 (Eucalyptus grandis E. tereticornis) as an energy forest in Leizhou Peninsula were studied under different densities. The results showed that the effects of density on diameter at breast height (DBH) and height (HT) were significant, and which stand volumes were different at different development stages. The individual biomass was decreased with increment of density. The stand volume and biomass in 1-year-old were biggest at density of 10000 ind. hm-2 for 52.57 m3 hm-2 and 32.02 t hm-2, respectively, and which those in 2-year-old were biggest at 2500 ind. hm-2 for 75.85 m3 hm-2 and 45.66 t hm-2, respectively. The effects of densities on wood calorific values and ash contents were not different significantly. It suggested that the optimal densities for bio-engery plantations at 1- and 2-year-old were 10000 and 2500 ind. hm-2, respectively.
