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O enraizamento adventício de estacas é influenciado por fatores intrínsecos e extrínsecos do material vegetal, e o conhecimento da ação deles é fundamental para o sucesso da produção de mudas por miniestaquia. O objetivo deste trabalho foi avaliar o grau de associação entre o estado nutricional das minicepas e o enraizamento de miniestacas de eucalipto, cultivadas em minijardim clonal em tubetes com subirrigação. Foram utilizados dados de enraizamento de miniestacas e teores de nutrientes quantificados pelas análises químicas dos tecidos foliares. A taxa de enraizamento foi correlacionada com o estado nutricional das brotações. Verificou-se que a nutrição mineral desempenha papel importante no enraizamento adventício de modo genótipo-dependente, ou seja, há diferença de comportamento dos clones em relação ao efeito dos nutrientes no enraizamento das miniestacas. Com relação ao teor de K, Ca, Mg e Mn, não foi observada associação com as taxas de enraizamento. Quanto aos demais nutrientes, em pelo menos um clone, houve associação positiva ou negativa entre as variáveis analisadas, com grau variável de acordo com o clone e o nutriente. The adventitious rooting of cuttings is influenced by intrinsic and extrinsic factors of the plant material. The knowledge about the action mode of these factors upon rooting is fundamental for the successful production of clonal seedlings through minicuttings. The objective of this study was to evaluate the degree of association between the nutritional state of ministumps with the rooting of eucalypt minicuttings, grown in a clonal minigarden in tubes with subirrigation. Data from minicutting rooting and nutrient contents quantified by chemical analyses of the leaf tissues were used. The rooting rate was correlated with the nutritional status of the shoots. It was verified that mineral nutrition plays an important role in adventitious rooting in a genotype-dependent way, i.e, the performance of the clones differs in relation to the effect of nutrients on minicutting rooting. For potassium, calcium, magnesium and manganese no association was observed between nutrient contents and the shooting and the rooting rates. For the other nutrients, at least for one clone, there is a positive or negative association among the variables, and the degree of this association varies according to the clone and nutrient

Relação do estado nutricional de minicepas com o enraizamento de miniestacas de eucalipto