Biomass production of Eucalyptus tereticornis Smith plantation managed under high density plantation system

Biomass production potential of seven years old Eucalyptus tereticornis plantation managed under high density plantation system was studied in the mid-hill zone of Himachal Pradesh at the experimental farm of Department of Silviculture and Agroforestry, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, HP. The experiment consisted of nine treatment combinations comprising of three plant densities and three N-levels. It was laid out in randomized block design with three replications. The results of the study revealed that survival per cent, tree height and diameter (dbh) were higher in the lowest plant density ie D₃ (6944 plant ha⁻¹) and minimum under density D₁ (27778 plant ha⁻¹) having maximum plant population. Biomass production per plant in all tree components decreased significantly with increase in plant density. An increase of 1.26 and 1.59 times in total biomass production with the decrease in plant population from D₁ to D₂ and D₁ to D₃ respectively was recorded. However results on hectare basis for the same parameters were exactly opposite to it and total biomass production under density D₁ was 2.50 times higher than D₃ and 1.78 times higher than the density D₂.