Dynamics in biomass expansion factor, root-to-shoot ratio and wood quality parameters in different girth class of gmelina arborea roxb.

Trees of different diameter classes were harvested to assess the dynamics in biomass, root: shoot ration and some wood characteristics. A perusal of data showed that in the 20–30 cm girthclass, the proportion of stem (53.67%) and root (25.61%) in total biomass was far more than the branch (12.56%) and leaf (8.16%) but with increase in girth class, the mean proportion of stem and root increased further i.e., 67.22% and 19.13%, respectively than branch (8.86%) and leaves (4.79%) in 120-130cm girthclass. The values of Biomass expansion factor (BEF) ranged from 1.36 to 1.17, showing decreasing trend as the range of the girth classes increased. Root: shoot ratio varied from 0.18 to 0.36 and per cent wood shrinkage decreased as the girth class increased.