Thinning Intensity and Pruning Impacts on Eucalyptus Plantations in BrazilReport as inadecuate




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International Journal of Forestry Research - Volume 2015 2015, Article ID 168390, 10 pages -

Research Article

Department of Forestry Engineering, Federal University of Jequitinhonha and Mucuri Valleys, Rodovia MGT 367, Km 583, No. 5000 Alto da Jacuba, Campus JK, 39100-000 Diamantina, MG, Brazil

Faculty of Forestry, University of British Columbia, 2424 Main Mall, Vancouver, BC, Canada V6T 1Z4

Department of Forestry Engineering, Federal University of Viçosa, Avenida Peter Henry Rolfs, s-n, Campus Universitário, 36570-900 Viçosa, MG, Brazil

Received 10 September 2014; Revised 17 November 2014; Accepted 2 December 2014

Academic Editor: Timothy Martin

Copyright © 2015 Gilciano Saraiva Nogueira et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A thinning intensity experiment using the Eucalyptus grandis × E. urophylla hybrid was conducted at three sites in Bahia State, Brazil. The treatments were a combination of thinning intensities and pruning: 20%, 35%, and 50% basal area removed with no pruning and 35% basal area removed plus pruning at 27 months. Plots were measured roughly annually from 27 to 165 months. Thinning was implemented on all sites at 58 months and again at 142 months at two of the sites. One of the sites was harvested at 87 months of age. A linear mixed model was applied separately to each installation to test for differences among treatments for mean increment of height, dominant height, quadratic mean diameter, and volume outside bark at the plot level. Additionally, differences in mean monthly increment of basal area and volume outside bark as a percentage of the value at the beginning of the increment period were examined. Increased thinning intensity increased all tree-level variables except dominant height. Pruning had no impact. Observed mortality on all plots was quite low. Thinning intensity response varied among sites and with time since thinning; however, the thinning intensity response was consistent through time among the installations.





Author: Gilciano Saraiva Nogueira, Peter L. Marshall, Helio Garcia Leite, and João Carlos Chagas Campos

Source: https://www.hindawi.com/



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