Abstract
The ideal spacing of a tree species is the one that maximizes wood production. Spacing is an important matter to be considered in forest management researches. The present study aimed to evaluate the development of Pinus taeda L. in the region of Irati, southern Brazil, grown at different vital spaces (ranging from 1.0 m2 to 16.0 m2 per tree), provided by nine different spacing measures between plants of a field experiment carried out in randomized block design with five replications. This study was based on measures of height and diameter at breast height (DBH) on 25 trees within the plot, seven years after the planting of seedlings from a clonal seed orchard. Analyses of variance and regressions were used to interpret the results. Average volumes between 74.75 and 274.89 m3 per hectare have been verified. Considering production volume even with small diameters, one should opt for smaller spaces; when larger diameters are desired, the option should be for larger spaces. A better performance in the relationship between volume and diameter can be obtained using vital spaces between 5.0 m2 and 8.0 m2 for each tree.
Highlights
The ideal spacing of a tree species is the one that maximizes wood production
Spacing is an important matter to be considered in forest management researches
The present study aimed to evaluate the development of Pinus taeda L. in the region of Irati, southern Brazil, grown at different vital spaces, provided by nine different spacing measures between plants of a field experiment carried out in randomized block design with five replications
Summary
Na medida em que a busca pelo aumento da produtividade em plantios florestais é constante, a produção de madeira com boas características depende do uso do manejo florestal e de práticas silviculturais adequadas, cuja prática necessita do conhecimento sobre a dinâmica de crescimento e a interação entre indivíduos no povoamento. Inúmeros fatores podem ser elencados como determinantes na escolha do espaçamento a ser empregado em plantios florestais, dentre os quais: a forma de crescimento e desenvolvimento radicial; as características do solo; o crescimento e o desenvolvimento das variáveis dendrométricas; a tolerância e a adaptabilidade da espécie escolhida; as práticas silviculturais e técnicas de manejo; os fatores climáticos; as condições de mercado; os métodos de colheita e, principalmente, o objetivo da produção. O objetivo deste trabalho foi avaliar o efeito de nove diferentes espaçamentos no desenvolvimento volumétrico de Pinus taeda L
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