Crescimento e produção de eucalipto submetido à desbrota, interplantio e reforma

• Autor(a) principal: Lopes, Hortênsia Nascimento Santos
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3100
• topic: Sistemas agroflorestais; Clone de eucalipto; Talhadia; Agroforestry; Eucalyptus clone; Coppice; CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::SILVICULTURA

The objective of this study was to evaluate wood production in the coppicing system, with different sprout thinning intensity of an eucalypt clone (clone 06) stand, established in a 10 x 4 m spacing, as compared to interplanting or stand renewal. The treatments included: no sprout thinning, thinning to one, two, three or four sprouts nine months after tree harvesting and to a variable number of sprouts at 12 months, maintaining the agroforestry system; thinning to one or two sprouts after nine months with interplanting of one row with the clone 58 (hybrid of E. camadulensis X E. tereticornis), and, stand renewal (plantation of two rows with the clone 58, with coppice removal), both with agroforetry system (AGF) exclusion. The highest sprout volume production estimate in the AGF was obtained when there was no sprout thinning, even though with a reduced diameter (dbh), total height (Ht) and technical cutting age. By adopting sprout thinning to three or more sprouts per stump, wood production was 15% smaller than for the no sprout thinning treatment, with a greater dbh and a smaller leaf area index (LAI). When the AGF was excluded by adopting interplanting or stand renewal, this last one presented the greatest volume production. The maintenance of three sprouts in the agroforestry system is recommended as it allows an adequate wood production and greater radiation transmittance (smaller LAI) for the crops and pasture of the consortium. Wood production for energy in agroforestry system in short rotations can be obtained by adopting no sprout thinning. Nevertheless, when the consortium is not intended the stand should be replaced by a most productive genotype to obtain higher wood production.