Blackberry (Rubus sp.) rootingfor double cropping production

Mestrado em Engenharia Agronómica - Hortofruticultura e Viticultura - Instituto Superior de AgronomiaWith the increasing of blackberry production worldwide, the search for new production systems has been ceaseless. Considering the extension of vegetative growth in mild winter climates regions, from March until November, and the huge amounts of hardwood wasted with pruning, three trials were accomplished aiming to exploit these features. In the first trial, floricane stem cuttings of three blackberry cultivars, ‘Arapaho’, ‘Ouachita’ and ‘Karaka Black’, were taken on 15th February 2011 from three different positions in the cane: apical, mid, and basal sections, and rooted in substrate under intermittent moist conditions. The mean percentage of rooted stem cuttings differed significantly (P