Seedling production of black raspberry by different methods of vegetative propagation/ Producao de mudas de framboeseira negra por diferentes metodos de propagacao vegetativa

Aiming to develop a propagation protocol through black raspberry (Rubus niveus) cutting and layering, the objective of the present research was to quantify the rizogenic potential of stems and roots cuttings, point and air layering of this specie. In the first experiment, the stems and roots cuttings of 10 cm of length were treated with different concentrations of indolbutyric acid (IBA): 1000, 2000, 3000 and 4000mg [L.sup.-1] for 10 seconds. In the second experiment, the stems and roots cuttings of black raspberry were cold storage by 10, 20 and 30 days, and control without storage. In both experiments, the stems cuttings were buried 2/3 length in the vertical position and the roots cuttings were totally immerged in the horizontal position, using the vermiculita as substrate, in greenhouse with 50% of light. After 60 days, they were evaluated. In the third experiment, the point and air layering were accomplished in the medium portion of the branches, being applied in the place different concentrations of IBA (0, 1000, 2000 and 3000mg [L.sup.-1]) and soon after, they were involved by the following humidified pinus substrate. After 45 days they were removed for the evaluation. It can be concluded that the stems cuttings presents better results in comparison by roots cuttings, owing cold storage and without IBA; the point layering promoted larger emission of roots in comparison to air layering. Key words: Rubus niveus, seedlings production, indolbutyric acid, cold storage. Visando estudar tecnicas de propagacao vegetativa da framboeseira negra (Rubus niveus) por estaquia e mergulhia, o objetivo do presente trabalho foi verificar o potencial rizogenico de estacas caulinares, radiculares, mergulhia de ponta e alporquia dessa especie. No primeiro experimento, estacas radiculares e caulinares de 10 cm foram tratadas com diferentes concentracoes de acido indolbutirico (AIB): 1000, 2000, 3000 e 4000mg [L.sup.-1] por 10 segundos, alem do controle composto somente por agua. No segundo experimento, as estacas foram armazenadas a frio por 10, 20 e 30 dias, alem do controle sem armazenamento. Em ambos os experimentos, as estacas caulinares foram enterradas 2/3 de seu comprimento na posicao vertical e as estacas radiculares foram totalmente imersas na posicao horizontal, utilizando a vermiculita de granulos finos como substrato, em telado com sombreamento de 50% e, apos 60 dias, foram avaliadas. No terceiro experimento, a mergulhia de ponta e alporquia foram realizadas