Abstract:

Abstract In forest stands, the ideal planting spacing can provide each tree with enough space for its establishment, aiming at greater growth and wood quality, according to the objective of planting. The objective of this study was to evaluate the growth in height, diameter, and volumetric production of three eucalyptus clones planted in different spacings. The experiment was carried out in an area belonging to Campo Bom Farm, in Chapadão do Sul, MS. A randomized block design was used in a factorial scheme, combining six spacings (2.5 x 0.5 m; 2.5 x 1.0 m; 2.5 x 2.0 m; 3.0 x 0.5 m; 3.0 x 1.0 m and 3.0 x 2.0 m) and three clone of Eucalyptus grandis x Eucalyptus urophylla (GG 680, GG 157 and GG 100) with three replications. The diameter at breast height (DBH) and height of all plants were evaluated at 12, 18, 24, and 32 months after planting. At 32 months, the cubage of a tree per plot was performed to obtain the volume of wood per tree and hectare. In the largest spacings, the highest average plant heights were observed. The growth of plant height was reduced from 24 months of age, except for the GG 680 clone, at 2.5 x 2.0 m and 2.5 x 1.0 m spacings, and in GG 100 clone, at 2.5 x 1.0 m spacing. The average diameter and volume per tree increased with the spacing for the three clones, while the volume per area was higher in the denser spacing. Wood volume production per area was dependent on the spacing used for the three clones. Author Biographies Wesley Gomes Silva, Universidade Federal de Mato Grosso do Sul, Campus de Chapadão do Sul/Egresso do curso de Engenharia Florestal Graduado em Engenharia Florestal pela UFMS, campus de Chapadão do Sul. Darcy Maria da Conceição Laura dos Santos, Universidade Federal de Mato Grosso do Sul, Campus de Chapadão do Sul/Discente Graduanda em Engenharia Florestal pela UFMS, campus de Chapadão do Sul. Ana Paula Leite Lima, Universidade Federal de Mato Grosso do Sul, Campus de Chapadão do Sul/Docente Doutora em Ciências Florestais, Professora dos cursos de Agronomia e Engenharia Florestal da UFMS. Filipi Duran Mattos, Universidade Federal de Mato Grosso do Sul, Campus de Chapadão do Sul/Egresso do curso de Engenharia Florestal Graduado em Engenharia Florestal pela UFMS, campus de Chapadão do Sul. Sebastião Ferreira Lima, Universidade Federal de Mato Grosso do Sul, Campus de Chapadão do Sul/Docente Doutor em Fitotecnia, Professor dos cursos de Agronomia, Engenharia Florestal e do Mestrado em Produção Vegetal da UFMS. Rita de Cássia Mariano de Paula, Universidade Federal de Mato Grosso do Sul, Campus de Chapadão do Sul/Egressa do curso de Engenharia Florestal Graduada em Engenharia Florestal pela UFMS, campus de Chapadão do Sul. References (I) Bernardo, A.L., Reis, M.G.F., Reis, G.G., Harrison, R.B., Firme, D.J., 1998. Effect of spacing on growth and biomass distribution in Eucalyptus camaldulensis, E. pellita and E. urophylla plantations in southeastern Brazil. Forest Ecology and Management, 104, 1-13.

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