The objective of this study was to analyze data from an experiment on initial spacing, installed in unthinned stands of Pinus taeda L. owned by IGARAS company, located in the Planalto Serrano, State of Santa Catarina, in Southern Brazil. The experiment was arranged in a randomized block design with three repetitions and nine treatments (spacing 1.5 x 1.0; 2.0 x 1.0; 2.5 x 1.0; 1.5 x 2.0; 2.0 x 2.0; 1.5 x 3.0; 2.5 x 2.0; 2.0 x 3.0; and 2.5 x 3.0 m). The measurements were taken from 4 to 14 years. The spacing and age effect on stand variables was analyzed by the Scott-Knot test and regression analysis. The results showed that the spacing influenced the growth tendency for total height, basal area per ha, quadratic mean diameter, volume per tree and volume per ha. The results allowed the confirmation that the spacing has little effect on the estimates of total height, and up to 14 years, the largest spacings provide larger estimates for quadratic mean diameter, volume per tree and survival, and smaller estimates for basal area per ha and volume per ha.
Pinus taeda; initial spacing; growth
