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Bruno Ettore Pavan, Rafaela Goularte Amaral, Rinaldo César de Paula, Bruno Marco de Lima and Edimar Aparecido Scarpinati

Abstract: Plantations made up of clones carry genetic uniformity that can compromise
production. The use of multiclonal plantations is a possible solution.
The objective of this study was to identify effects of competition on silvicultural
performance of Eucalyptus spp. commercial clones. The experiment was carried
out in a randomized block design with 12 eucalyptus clones, three replicates, and
five plants per plot. Clones were evaluated for two competition types, intra- and
intergenotypic, at 3 and 5 years of age. Competition parameters were estimated
based on the analyses performed. Differences were found between the types of
competition at both ages for mean annual increment and wood volume. Clones
8 and 9 stood out from the others in both intra- and intergenotypic competition.
At 5 years of age, intergenotypic competition produced productivity gains
of 13% in clones 8 and 9 and 4% overall considering wood volume and mean
annual increment.

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