Efeito da intensidade de desbaste nas características dendrométricas e tecnológicas da madeira de Eucalyptus grandis
This study aimed at evaluating the effect of different thinning intensities in the dendrometric and technological characteristics of 14 years-old Eucalyptus grandis W. Hill ex Maiden wood sited in the northern coast of Rio Grande do Sul. Randomized blocks experiment, with four treatments (T1 = 163...
Main Authors: | , , , , |
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Format: | Article |
Language: | Portuguese |
Published: |
Universidade Federal de Santa Maria
2007-01-01
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Series: | Ciência Florestal |
Online Access: | http://www.redalyc.org/articulo.oa?id=53417409 |
Summary: | This study aimed at evaluating the effect of different thinning intensities in the dendrometric and
technological characteristics of 14 years-old Eucalyptus grandis W. Hill ex Maiden wood sited in the
northern coast of Rio Grande do Sul. Randomized blocks experiment, with four treatments (T1 = 1638
trees/ha; T2 = 1150 trees/ha; T4 = 589 trees/ha and T8 = 192 trees/ha) and four repetitions was analyzed. The
trees were selected on the basis of the dominant and average diameter of each treatment. After cutting down,
trees were measured and the volume was determined by the Smalian method, disks were taken at the base 0,
25, 50, 75 and 100% of the commercial height, and at the DBH (diameter at breast height), for basic density,
dry mass and radial shrinkage determination. In relation to the dendrometric characteristics, results indicate
that the application of more severe thinning caused significant gain in diameter at breast height, height and
volume in average trees, not influencing the dominant ones. Concerning the technological characteristics,
results indicate that the basic density of the average trees was influenced by thinning; however, without
presenting clear trend regarding the intensity of the intervention. The production of dry mass of the average
trees increased with the thinning intensity and did not affect the production of the dominant trees. The radial
shrinkage of the dominant and average trees grew up in the pith-to-bark direction, not being modified by
thinning intensity. Results allow concluding that the silvicultural interventions applied in the forest influence
wood quality. |
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ISSN: | 0103-9954 1980-5098 |