This work evaluated the mineral composition of leaves and fruits of apple (Malus domestica Borkh) ‘Fuji’ on different rootstocks. The experiment was conducted from 2008 to 2011 in the municipality of São Joaquim (SC). The treatments evaluated rootstocks: CG.008, CG.24, CG.56, CG.058, CG.210, CG.213, CG.757, CG.814 and CG.969 of the American series Cornell Geneva (CG); JM.2 and JM.7 of the Japanese series Japan, Morioka (JM); and M.7, M.9 and M.26 of the English series, EMLA (M). The experimental design was randomized blocks with four repetitions. Annually, the leaves were collected for the chemical analysis. Only in the years 2009 and 2010, the fruit samples were collected to determine nitrogen (N), phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg). The leaf Ca content differed between rootstocks, especially for CG.213 and CG.969, which presented a higher content of the nutrient. However, there were no differences between rootstocks in terms of Ca content in the fruit, which confirms the low ratio between the contents in leaves and fruits. Ratios between nutrients, mainly (K+Mg)/ Ca, are more sensitive to the Ca content to discriminate groups of rootstocks about possible risk of physiological disorders in the fruits. Indexation terms: Malus domestica, mineral nutrition, physiological disorders, fruit quality. Composição mineral de folhas e frutos da macieira ‘Fuji’ em diferentes porta-enxertos na região de São Joaquim-SC Resumo – O trabalho objetivou avaliar a composição mineral de folhas e frutos de macieira (Malus domestica Borkh) ‘Fuji’ sobre diferentes porta-enxertos. O experimento foi conduzido durante o período de 2008 a 2011, no município de São Joaquim (SC). Os tratamentos consistiram na avaliação de 14 porta-enxertos: CG.008, CG.24, CG.56, CG.058, CG.210, CG.213, CG.757, CG.814 e CG.969 da série americana Cornell Geneva (CG); JM.2 e JM.7 da série japonesa Japan, Morioka (JM); e M.7, M.9 e M.26 da série inglesa, EMLA (M). O delineamento experimental foi em blocos ao acaso, com quatro repetições. Anualmente, foram coletadas as folhas para a análise química. Apenas nos anos de 2009 e 2010, as amostras de frutos foram coletadas para determinação de nitrogênio (N), fósforo (P), potássio (K), cálcio (Ca) e magnésio (Mg). O teor foliar de Ca diferiu entre porta-enxertos, com destaque para CG.213 e CG.969, os quais apresentaram maior teor do nutriente. Entretanto, não houve diferenças entre porta-enxertos em relação ao teor de Ca no fruto, o que confirma a baixa relação entre os teores nas folhas e nos frutos. As relações entre os nutrientes, principalmente de (K+Mg)/Ca, são mais sensíveis que o teor individual de Ca para discriminar grupos de porta-enxertos quanto ao possível risco de apresentar distúrbios fisiológicos nos frutos. Termos para indexação: Malus domestica, nutrição mineral, distúrbios fisiológicos, qualidade de frutos. 1Agronomist, Doctor in Soil Science and Plant Nutrition, Embrapa Clima Temperado , Pelotas, RS-Brasil, E-mail: gilberto.nava@embrapa.br 2Agronomist, Doctor in Soil Science, Researcher of the Estação Experimental de São Joaquim/ São Joaquim,SC-Brasil, E-mail: marlise@epagri.sc.gov.br 3Assistant Professor, Department of Horticulture, Oregon State University, Mid-Columbia Agricultural Research and Extension Center, 3005 Experiment Station Drive, Hood River, OR 97031, E-mail: mateus.pasa@gmail.com 4Agronomist, Master in phytopathology, Researcher of the Empresa Fito Desenvolvimento e Produção, São Joaquim-SC-Brasil. E-mail: fito.boneti@gmail.com
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