THE EFFECT OF PRUNING INTENSITY ON THE PRODUCTION OF Pinus elliottii Engelm., IN A POOR SOIL IN THE STATE OF RIO GRANDE DO SUL

• Autor(a) principal: Schneider, Paulo Renato
• Data de Publicação: 1999
• Outros Autores: Finger, César Augusto Guimarães, Hoppe, Juarez Martins
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Ciência Florestal (Online)
• Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/364
• topic: Pinus elliottii Engelm.; pruning; yield.; Pinus elliottii Engelm.; desrama; produção.

The effect of the pruning intensity on the production of Pinus elliottii Engelm. was studied in a randomized block design trial with 5 treatments and 3 repetitions. The treatments were: T1 – control, without pruning; T2 – pruning of the dead branches; T3 – pruning of 40% of the total height; T4 - pruning of 50% of the total height; and T5 – pruning of 60% of the total height. The diameter and wood volume were affected by the pruning intensity of the 11-year old stand. The control (263.5 m3/ha) and pruning of the dead branches (245.1 m3/ha) were different from all other treatments (pruning of 40% - 231.5 m3/ha; pruning of 50% - 225.5 m3/ha; and pruning of 60% -211.6 m3/ha). The smallest production loss was 12% on the 40% pruning, and the greatest loss was 20% on the 60% pruning treatment. It is concluded that pruning intensities below 40% of the total height should be employed because of the lower production losses, and increases in diameter and quality of the wood.