Publicação on-line; 21 ref.; 5 tables; Summary (En)

ABSTRACT

The objective of this work was to evaluate the effects of fertilization, spatial arrangement and
age on the biomass production in eucalyptus. The experiment was set up in a randomized block
design with four replicates. Overall, 15 fertilizations adopted by forest companies in plots were
evaluated, and two arrangements, 3.0 x 3.0 m and 6.0 x 1.5 m, were tested in subplots. Diameter at
1.30 m and total height were measured at 12, 24, 36, 48 and 60 months after planting to estimate
trunk biomass. Dependence between commercial fertilization and arrangement were observed
for trunk biomass. The biomass production rate in treatments where higher amounts of nutrients
were applied decreased from the second year. The 3.0 x 3.0 m arrangement proved to be the most
attractive option at 60 months using treatment with 2000 kg of agrosilicon, 400 kg of reactive
phosphate, 130 kg of 04:26:16 + 0.5% Cu + 0.5% Zn and 150 kg of KCl + 1% B.

Keywords: space arrangement, forest fertilization, forestry.