Biomasa de Eucalyptus nitens de 4-7 años de edad en un rodal de la X Región, Chile

Abstract

The total biomass of a Eucalyptus nitens plantation was estimated in age sequence from 4 to 7 years, with fertilization (X Region, 41°01'S- 73°27'W), in red clayey soil of Crucero series. The forest biomass at ages 4, 5 and 7 was estimated from the corresponding average quadratic diameter (DMC) of the tree; being interpolated at age 6. Components of the crown, stem and roots were obtained; additionally humus and litter were calculated. The total biomass of the stand reached 92 t ha-1 at 4 years, 131 t ha -1 at 5 years and 181 t ha-1 at 6 years with a density of 1,500 trees ha-1. After thinning, between ages 6-7, the total biomass increase was 29.8 t ha-1. Yearly root increase was 0.5, 2.4 and 3.8 t ha-1 in the sequence 4-7 years old. Thinning provided the soil with 21.7 t ha-1 of waste (crowns and bark) and exported 49 t ha -1 of wood. Pruning of the lowest third of crowns (800 trees ha -1) at 5 years contributes with 5.8 t ha-1 of branches and 3.8 t ha-1 of leaves to the soil. © 2007 Universidad Austral de Chile.