Produção da bananeira 'Prata Anã' em função da aplicação de adubo fosfatado, em quatro ciclos

Abstract

O objetivo deste trabalho foi avaliar a resposta da bananeira 'Prata Anã' (AAB) irrigada à aplicação de fósforo no solo, em quatro ciclos de produção. O experimento foi conduzido na região semiárida do norte de Minas Gerais, em Latossolo Vermelho, argiloso, com teor de P disponível muito baixo (4,6 mg dm-3, Mehlich). Utilizou-se o delineamento de blocos ao acaso, em arranjo fatorial 5x4, com cinco doses de superfosfato triplo (0, 50, 100, 200 e 300 g de P2O5 por planta por ano), quatro ciclos de produção e quatro repetições. No primeiro ciclo, a aplicação de P no solo aumentou a altura, o diâmetro do pseudocaule, a massa e o número de frutos do cacho de banana; no entanto, a bananeira não respondeu à aplicação de P nos segundo, terceiro e quarto ciclos. A bananeira 'Prata Anã', mesmo quando cultivada em solo com baixo teor de P, responde à aplicação desse nutriente somente no primeiro ciclo de produção.

Agronomic Evaluation of Banana Plants in Three Production Cycles in Southwestern State of Bahia

“…Among cases of variation, most of the cultivars showed an increase in the number of fruits per hand throughout cycles. Similar results were found by Silva and Rodrigues (2013) when evaluating bunch mass, number of hands and fruits per bunch of 'Prata-Anã' banana plants, regardless of application of P in the soil, in four production cycles.…”

Growth, yield and fruit quality of ‘Maçã’ banana under different rates of phosphorus fertilization

“…The result corroborates the findings of Silva and Rodrigues (2013), evaluated 'Dwarfprata' banana in four production cycles and reported that the third leaf from the apex, which is commonly used for nutrient content analysis, may not be sensitive to detect P deficiency or excess.…”

“…The results corroborate the findings of Reis and Chepote (2008), who evaluated the effect of P on 'Pacova' banana (AAB) in dystrophic red-yellow latosol (oxisoil), they also reported a quadratic function on plant height and pseudo-stem circumference. However, banana does not require large amounts of P (Silva and Rodrigues, 2013), phosphorus fertilization has proved to be necessary for growing 'Maçã' banana, which increases pseudo-stem diameter (4.6%), but available P content tends to be extremely low in most latosols, because assimilable forms is restricted to a few plant (Silva et al, 2011). P can notably increase vegetative growth; being indispensable for cell division, as it is a constituent element of nucleoproteins (Malavolta, 1997).…”

“…During inflorescence phase, it was collected leaf samples (Teixeira et al, 1997); and P levels were evaluated (Malavolta et al, 1997). At the end of harvest, the resin method was used to measure the quantity of potentially available P by collecting four simple soil samples per plot (at a depth of 0-20 cm) in the fertilization area, which formed a composite sample (Silva and Rodrigues, 2013).…”

“…According to Silva and Rodrigues (2013), who evaluated the first cycle of 'Dwarf-prata' banana, observed an increase in height, pseudo-stem diameter, bunch mass and number of fruits per bunch at different rates of P 2 O 5 . Al-Harthi and alYahyai (2009) evaluated growth and yield of 'Wiliams' banana under NPK fertilizer.…”