THINNING EFFECT ON PLANT GROWTH OF PRUNED EUCALYPT CLONE

Diego  Correa Ramos; Geraldo  Gonçalves dos Reis; Maria das Graças  Ferreira Reis; Helio  Garcia Leite; Jonathan James  Stocks; Ana Paula  Leite de Lima; Ronan  Soares de Faria

THINNING EFFECT ON PLANT GROWTH OF PRUNED EUCALYPT CLONE

Autores

Diego Correa Ramos

Geraldo Gonçalves dos Reis

Maria das Graças Ferreira Reis

Helio Garcia Leite

Jonathan James Stocks

Ana Paula Leite de Lima

Ronan Soares de Faria

Editor

Universidade Federal de Viçosa

Descripción

pruned stand of eucalypt clone underwent five thinning treatments with the removal of different proportion of the planted trees, at different ages: a) 0% - unthinned, b) 35% at 55 months, c) 35% at 81 months, d) 70% at 81 months, removing sprouts in the thinned plant stumps and, e) 70% at 81 months, without coppice sprouts removal. By the age of 141 months, the Weibull distribution showed higher number of trees in the smallest diameter classes for the unthinned treatment. The 70% thinning, with thinned coppice sprouts removal, presented higher number of individuals in the largest diameter classes. Height and yield were the smallest with the removal of 70% of the trees at 81 months, maintaining coppice sprouts. The after- thinning periodic annual increment was greater by thinning 35% of the trees at 55 months resulting in greater number of trees in the largest diameter classes as compared to the other treatments. Yield was higher for the unthinned treatment. The results of this study indicated that thinning 70% of the trees at the age of 81 months, with coppice sprout removal, could be recommended to obtain trees of larger diameter for multiproduct.