Resumen de Vegetative development and yield of the banana cv. 'Prata Anã' as a function of magnesium and potassium fertilization

Inêz Pereira da Silva, José Tadeu Alves da Silva, Paulo Jorge de Pinho, Cleber Lázaro Rodas, Janice Guedes de Carvalho

• español

  Vegetative development and yield of the banana cv. 'Prata Anã' as a function of magnesium and potassium fertilization PDF Índice Volumen 31, N° 2. Páginas 83-88 IDESIA (Chile) Mayo-Agosto, 2013 INVESTIGACIONES Vegetative development and yield of the banana cv. 'Prata Anã' as a function of magnesium and potassium fertilization Desarrollo y producción del banano 'Prata Anã' bajo fertilización con magnesio y potasio Inêz Pereira da Silva1*, José Tadeu Alves da Silva2, Paulo Jorge de Pinho1, Cleber Lázaro Rodas1, Janice Guedes de Carvalho1 1 Departamento de Ciência do Solo - Universidade Federal de Lavras, Campus UFLA, Lavras- MG, Brasil. Caixa Postal 3037-CEP 37.200-000.

  2 Empresa de Pesquisa Agropecuária de Minas Gerais - EPAMIG/ CTNM. * Corresponding author: inezps@yahoo.com.br ABSTRACT To apply high amounts of K to the soil there must be adequate quantities of Mg, thus avoiding the rise of physiological disorders in the banana plant which appear as Mg-induced deficiency symptoms. The purpose of this study was to evaluate the effects of application of K and Mg on the vegetative development and yield of the banana cv. "Prata Anã'. Treatments were distributed in a randomized block design in a 3 x 5 factorial arrangement, corresponding to three doses of potassium (0, 800 and 1200 kg ha-1 year-1) and five doses of magnesium (0, 60, 120, 240 and 480 kg ha-1 year-1), with three replicates. The sources of potassium and magnesium were potassium chloride and magnesium sulfate, respectively. Application of K, regardless of the cycle, increased the bunch weight, the number of banana fruits per bunch, the number of hands per bunch, and the weight and diameter of the middle fruit of the banana plant. Increasing doses of Mg applied to the soil reduced the weight of the bunch in the first cycle; and with increasing doses of K there was an increase in the leaf content of K and Ca, with a decrease in the leaf content of Mg and B in the banana cv. 'Prata Anã'.

  Key words: Musa sp., mineral nutrition, nutritional balance.

  RESUMEN Para que sean aplicadas grandes cantidades de K en el suelo, hay necesidad que los niveles de Mg sean adecuados en lo mismo, evitando así la aparición de desórdenes fisiológicos en el banano, expresado en los síntomas de deficiencia inducida de Mg. El objetivo de este estudio fue evaluar los efectos de la aplicación de K y Mg en el desarrollo y la productividad del banano'Prata Anã'. Los tratamientos se dispusieron en un diseño de bloques al azar con un factorial 3 x 5, que corresponden a tres niveles de potasio (0, 800 y 1200 kg ha-1 año-1) y cinco dosis de magnesio (0, 60, 120, 240 y 480 kg ha-1 año-1), con tres repeticiones. Las fuentes de potasio y magnesio fueron, respectivamente, cloruro de potasio y sulfato de magnesio. La aplicación de K, independiente del ciclo, aumentó el peso del racimo, número de frutos por racimo, el número de manos por racimo, la masa y el diámetro del fruto central de la banana. Dosis crecientes de Mg aplicadas al suelo reducen la masa del racimo en el primer ciclo. Con el incremento de las dosis de K hubo un aumento en K y Ca foliar, con una reducción en Mg y B foliar del banano 'Prata Anã'.

• English

  To apply high amounts of K to the soil there must be adequate quantities of Mg, thus avoiding the rise of physiological disorders in the banana plant which appear as Mg-induced deficiency symptoms. The purpose of this study was to evaluate the effects of application of K and Mg on the vegetative development and yield of the banana cv. "Prata Anã'. Treatments were distributed in a randomized block design in a 3 x 5 factorial arrangement, corresponding to three doses of potassium (0, 800 and 1200 kg ha-1 year-1) and five doses of magnesium (0, 60, 120, 240 and 480 kg ha-1 year-1), with three replicates. The sources of potassium and magnesium were potassium chloride and magnesium sulfate, respectively. Application of K, regardless of the cycle, increased the bunch weight, the number of banana fruits per bunch, the number of hands per bunch, and the weight and diameter of the middle fruit of the banana plant. Increasing doses of Mg applied to the soil reduced the weight of the bunch in the first cycle; and with increasing doses of K there was an increase in the leaf content of K and Ca, with a decrease in the leaf content of Mg and B in the banana cv. 'Prata Anã'.