HERBICIDE USE FOR THE REDUCTION OF GROWTH STRESS IN Eucalyptus grandis SAWN TIMBER

• Autor(a) principal: Cademartori, Pedro Henrique Gonzalez de
• Data de Publicação: 2015
• Outros Autores: Gatto, Darci Alberto, Stangerlin, Diego Martins, Mastella, Tarso, Vargas, Jonas Flores, Santini, Elio José
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Ciência Florestal (Online)
• Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/19697
• topic: wood quality; wood sawing; wood technology.; qualidade da madeira; desdobro da madeira; tecnologia da madeira.

This work aimed to evaluate the efficiency of herbicide in reduction of growth stress effects on the incidence of splits and warps on boards originated from Ecalyptus grandis trees. For this, 40 trees were selected at random, subdivided into four chemical treatments with application of herbicide (“Imazapyr” active principle) and one treatment without herbicide application, with eight repetitions each. After the action of herbicide, the trees were harvested and the first log of each tree was cut. The logs were sawn to make the analyses before and after air drying operation. The results indicated higher efficiency of herbicide in treatments 4 and 5 on the effect of growth stresses in the form of splits in the boards. For the crook, the treatments 2 and 4 showed lowest levels of defects. The bow had influence of air drying operation, while the cup was not observed significantly in the pieces of sawn timber from five treatments.