Abstract
Considering the importance of optimizing forest production, plant spacing is one of the most relevant silvicultural practices, as it holds ecological, silvicultural, and economic implications to the final product. Therefore, this study set out to assess the influence of spacing on the initial growth and production variables of hybrid clones of Eucalyptus urophylla S. T. Blake x Eucalyptus grandis W. Hill ex Maiden planted in a Nelder (fan-shaped) design. Plant densities ranged from 0.50 m² to 41.25 m² in area-per-plant. Variables such as total height, diameter, and volume were observed at 16, 24, and 36 months. A descriptive statistical analysis, Pearson’s correlation coefficient, and cluster analysis of averages were used to evaluate the effect of spacing on the variables in question. Different spacings were found to exert significant influences on growth in height, diameter, and volume.
Highlights
Silviculture is the predominant basis for the forestry sector; all findings obtained through this science will be reflected in socioeconomic and environmental implications
Various studies by Balloni e Simões (1980), Nascimento et al (2012), Benin et al (2014) e Leles et al (2014) have been conducted, and others are currently underway in order to improve silvicultural practices and analytical methods for determining ideal spacing regimes based on the purpose of each plantation
Field research area and implementation of the Nelder “fan-shaped” design The study was conducted in the Federal District of Brasília at Fazenda Água Limpa (FAL), which has an area of 4,390 ha
Summary
Silviculture is the predominant basis for the forestry sector; all findings obtained through this science will be reflected in socioeconomic and environmental implications. Considering the relevance of optimizing forest production through management, proper spacing is fundamental due to its ecological and silvicultural implications to the final product. Spacing must be based on the end use of forest production but on several other ecological, physiological, silvicultural, and economic factors (BALLONI; SIMÕES, 1980). Determining the best spacing is no simple matter. Various studies by Balloni e Simões (1980), Nascimento et al (2012), Benin et al (2014) e Leles et al (2014) have been conducted, and others are currently underway in order to improve silvicultural practices and analytical methods for determining ideal spacing regimes based on the purpose of each plantation
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