Propagação vegetativa do jequitibá-rosa (Cariniana estrellensis (Raddi) Kuntze) e do pau-jacaré (Piptadenia gonoacantha (Mart.) Macbr.) por estaquia

• Autor(a) principal: Castro, William Hernández
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3056
• topic: Silvicultura clonal; Enraizamento de estaca; Clonagem; Propagação vegetativa; Clonal forestry; Rooting of cuttings; Cloning; Vegetative propagation; CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::SILVICULTURA

The jequitibá-rosa (Cariniana estrellensis (Raddi) Kuntze) and the pau-jacaré (Piptadenia gonoacantha (Mart.) Macbr.) are native species with great potential of utilization for use by the forest sector brazilian, which are distinguished by the diversity of uses for their wood. Currently, these species have the seeds as the main form of propagation in the process of plants production. The objective of this work was to develop methods for vegetative propagation for jequitibá-rosa (Cariniana estrellensis (Raddi) Kuntze) and the pau-jacaré (Piptadenia gonoacantha (Mart.) Macbr.) by the technique of cutting, where were tested different dosages (0, 2.000 and 6.000 mg L-1) of growth regulator ácido indolbutírico (IBA) and type of cutting (apical, intermediate and basal) using propagules vegetative juvenile of seminal source. Three evaluations were realized (a greenhouse for 120 days, the shade house for 140 days and a full sun for 170 days) in the case of the pau-jacaré was also tested two types of substrate (vermiculite and compost organic) applying 6000 mg L-1 of IBA. In the jequitibá-rosa the IBA dosages were tested in two time periods (seasons). For both species, in the evaluations were quantified survival, rooting (root seen in the bottom of the tube), force and height, and biomass of root and shoot at the end of the experiments. For both species, application of IBA did not show a clear trend on the effects in the characteristics evaluated; however, the type of cutting, the apexes showed the highest values for the characteristics studied. The stump of both species showed a survival of 100% with an upward production of cuttings. In the case of the substrate, the organic compost presented great values in the rooting of the cuttings of pau-jacaré in relation to the vermiculite. How much to the effect of the period of year in the propagation of jequitibá-rosa, in the period from August to January the average values of the characteristics evaluated were lower compared with those obtained in the period of May to October. Concluded that the propagation vegetative of the jequitibá-rosa and of the pau-jacaré by the technique of cutting with cuttings of seminal origin is technically viable, mainly when they used stem cutting, without need of use of AIB.