Padrões de miniestacas e densidade de minicepas na propagação clonal de Eucalyptus grandis x E. urophylla

• Autor(a) principal: Souza, Cibele Chaves
• 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/123456789/3104
• topic: Propagação vegetativa; Enraizamento adventício; Miniestaquia; Vegetative propagation; Adventitious rooting; Mini-cutting; CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::SILVICULTURA

This work aimed to evaluate: 1) the influence of different types of mini-cuttings in the rooting and production of seedlings of Eucalyptus grandis x E. urophylla in summer and winter; 2) the effect of two types of mini-cuttings and four patterns of substrates on production of clonal material genetic of Eucalyptus grandis x E. urophylla, and 3) different densities of mini-stumps in channels in sand to production of mini-cuttings and survival of mini-stumps and mini-cuttings produced. We used five clones of Eucalyptus grandis x E. urophylla for the study of 12 types of mini-cuttings in summer and winter and for the study of two types of mini-cuttings together with four substrates in the production of seedlings. As for the density in mini-stumps clonal we used two clones of Eucalyptus grandis hybrids. The results showed differential responses of clones in the types of mini-cuttings, substrates and time of year. The non-reduction of the leaves of mini-cuttings proved an appropriate procedure for the production of seedling in two seasons, and the seedlings produced using mini-cuttings in summer and 10 cm in size had a higher growth. The substrates consist of vermiculite and carbonized rice husk resulted in better results and with organic compost was not a suitable substrate for the production of seedlings of Eucalyptus grandis x E. urophylla, mainly due to low quality seedlings produced. As for the mini-clonal hedge, the lowest densities mini-stumps/m² (with 57 and 78 mini-stumps/m²) achieved higher production and lower mortality mini-cuttings of mini-stumps.