CUTTING TYPES COLLECTED AT DIFFERENT SEASONS ON BLACKBERRY MULTIPLICATION

Abstract

ABSTRACT Blackberry is a shrubby perennial tree with high economic importance among horticultural crops in several countries. The fruit has a good market value, both at national and international level. The objective of this work was to evaluate the multiplication of blackberry cv. Xavante cuttings under different seasons over the year, aiming to improve the production of nursery plants. The experiment was carried out from April 2012 to March 2013 and it was laid out in randomized complete block design with different types of cutting: tip, softwood, semihardwood and root, examined in different seasons: autumn, spring and summer, with 5 replications and 10 cuttings per plot. The variables studied were: cutting rooting, cutting survival, number of roots, length of major roots and roots dry weight. Cuttings of blackberry had a significant temporal variation in the percentage of successful rooting and survival of cuttings. It was verified that softwood and semihardwood cuttings collected in summer are the best option for blackberry cv. Xavante multiplication for commercial production of nursery plants.RESUMO A amoreira-preta é uma planta arbustiva e perene de relevante importância econômica entre as culturas frutíferas cultivadas no mundo, e apresenta frutos de bom valor de mercado, seja nacional ou internacional. O objetivo do trabalho foi avaliar o enraizamento de diferentes tipos de estacas de amoreira-preta cv. Xavante em três estações do ano. O ensaio foi conduzido entre abril de 2012 a março de 2013, no outono, primavera e verão, utilizando estacas de ponteiro, herbácea, semilenhosa e raiz. O delineamento experimental foi em blocos casualizados, com cinco repetições e 10 estacas por parcela. As variáveis estudadas foram: porcentagem de sobrevivência e enraizamento, número de raízes por estaca, comprimento e massa seca das raízes. As estacas de amoreira-preta apresentaram significativo impacto temporal na porcentagem de enraizamento e sobrevivência. Estacas herbáceas e semilenhosas, coletadas durante o verão, são as melhores opções para a multiplicação comercial de mudas da amoreira-preta cv. Xavante.