Eucalyptus grandis Hill ex Maiden PRODUCTION IN DIFFERENT THINNING INTENSITIES

• Autor(a) principal: Schneider, Paulo Renato
• Data de Publicação: 1998
• Outros Autores: Finger, César Augusto Guimarães, Hoppe, Juarez Martins, Drescher, Ronaldo, Scheeren, Luciano W., Mainardi, Gerson Luis, Fleig, Frederico Dimas
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Ciência Florestal (Online)
• Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/357
• topic: Thinning; yield; Eucalyptus grandis.

The effect of different thinning intensities on the production of Eucalyptus grandis HILL ex Maiden, planted in 1981, with a spacing of 3.0 x 2.0 m, in Cachoeira do Sul, Rio Grande do Sul, was studied in a randomized block design, in four treatments with two repetitions: control treatment, without thinning, and maintenance of 40%, 50% and 60% of  the  basal  area  proportionally  to  the  control.  Significant differences among the treatments were detected with 5% probability. Maximum yield (756.2 m3cc/ha) was obtained on the control, which was not statistically different from the treatment with 60% of the basal area (639.6 m3cc/ha) only. The reduction in the basal area increased the concentration of the frequencies of the larger diameter classes, skewing the distribution to the right; however, there was an expressive loss of total yield and a significant increase in diameter. The maintenance of 60% of the basal area allowed the least loss of production, at about 15.4%, and an increase of 6.4 cm or 23.9% in diameter of the remaining trees when compared with the control.