Open AccessVariáveis dendrométricas e produção de Eucalyptus benthamii em diferentes espaçamentos
Author(s) -
Luciano Farinha Watzlawick,
Cristiane Carla Benin
Publication year - 2020
Publication title -
colloquium agrariae
Language(s) - English
Resource type - Journals
ISSN - 1809-8215
DOI - 10.5747/ca.2020.v16.n6.a413
Subject(s) - sowing , hectare , mathematics , basal area , eucalyptus , volume (thermodynamics) , forestry , zoology , horticulture , botany , geography , biology , physics , ecology , quantum mechanics , agriculture
This study aimed to evaluate the effect of planting spacing on production and dendrometric variables, in experimental planting with improved E. benthamiiseeds, at six years of age. The experimental design adopted was in randomized blocks, with four replications of twenty trees. The treatments were four planting spacing 3 x 2 m, 3 x 3 m, 3 x 4 m and 4 x 4 m. After the field procedures (forest inventory, sampling and cubage of 79 trees), the main dendrometric parameters were obtained in each spacing. The heights were determined by a hypsometric relationship and the volume ofother trees in the stand was estimated by the model of Schumacher and Hall (1933). The dendrometric variables showed a high correlation with the spacing. The wider spacing favored the diameter, height, transversal area and the individual volume, while the smaller vital spaces were responsible for the highest values of basal area and volume per hectare. Production ranged from 238.90 m³ ha-1in the largest spacing to 392.08 m³ ha-1in the smallest spacing. It was concluded that there was an effect of the planting spacing, and that with the trends observed regarding the higher production per hectare in the denser spacing, it is opportune to plan the forest production according to the planting spacing adopted.