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Resumo -O objetivo deste trabalho foi avaliar as características agronômicas de bananeiras tipo Prata em três ciclos de produção, sob diferentes sistemas de irrigação, em condições semiáridas. Adotou-se o delineamento experimental de blocos ao acaso, com seis tratamentos em arranjo fatorial 3x2: três sistemas de irrigação -aspersão convencional, microaspersão e gotejamento -e dois genótipos -'Prata-Anã' e PA42-44. Utilizaram-se quatro repetições e parcelas com seis plantas úteis. À época do florescimento, avaliaram-se: altura de planta; perímetro de pseudocaule; número de folhas vivas; comprimento e largura da terceira folha; área foliar total e índice de área foliar. À colheita, avaliaram-se: massa do cacho e das pencas; massa média das pencas; massa das três primeiras pencas; número de pencas e de frutos; massa, comprimento e diâmetro de fruto; e número de folhas vivas. O sistema de irrigação por gotejamento proporciona menor vigor, expresso pelo porte e perímetro do pseudocaule, para bananeiras tipo Prata, em comparação aos sistemas de irrigação por aspersão e microaspersão. A 'Prata-Anã' apresenta maior número de frutos e de pencas por cacho, enquanto seu híbrido PA42-44 apresenta maior massa, comprimento e diâmetro do fruto.Termos para indexação: Musa, distribuição de água, irrigação pressurizada, triploide AAB, tetraploide AAAB. Agronomic characteristics of Prata type banana plants under different irrigation systemsAbstract -The objective of this work was to evaluate the agronomic characteristics of Prata banana plants during three production cycles, under different irrigation systems, in semi-arid conditions. A randomized block design was adopted with six treatments, in a 3x2 factorial arrangement: three irrigation systems -conventional sprinkler, microsprinkler and drip -and two genotypes -'Prata-Anã' and its hybrid PA42-44. Four replicates in plots with six useful plants were used. Plant height, pseudostem perimeter, number of alive leaves, length and width of the third leaf, total leaf area, and leaf area index were evaluated at flowering. Weight of bunch and hands, mean weight of hands, weight of the three first hands, number of hands and fruits per bunches, and weight, length and diameter of fruits and number of alive leaves were evaluated during the harvest season. The drip irrigation system provides smaller vigor to banana Prata, in comparison to conventional and to micro sprinkler systems, as can be seen by the size and perimeter of the pseudostem. The cultivar Prata-Anã shows a larger number of fruit and hands per brunch, while its hybrid PA42-44 shows larger weight, length and fruit diameter.

The objective of this research was to evaluate the nutritional status and yield of ‘Prata’ bananas fertilized with different sources for organic management applied to soils with improved fertility. Two cultivars (‘Prata-Anã’ and ‘BRS Platina’), five annual potassium rates (0, 200, 400, 600, and 800 kg ha-1 of K2O) supplied by bovine manure and rock powder, and six evaluation periods (210, 390, 570, 750, 930, and 1.110 days after transplanting – DAT) were laid out in a randomized block design, in a 2 x 5 x 6 factorial arrangement with three replicates. The yield was determined over three cycles. The levels of K and S in leaves increased with increasing rates of K2O interacting with the evaluation periods. The levels of N, P, and Cu increased with increasing rates of K2O. High soil fertility and manure and rock powder applications were not enough to maintain appropriate levels of leaf Mn in ‘Prata-Anã’. The levels of leaf K, S, Cu, and Zn in the cultivar Prata-Anã differed from those of the ‘BRS Platina’. Applying manure and rock powder as organic fertilizers did not increase the yield of ‘Prata-Anã’ and ‘BRS Platina’ banana plants grown on soils with improved fertility during four production cycles. Keywords: Musa spp.; leaf tissue analysis; yield.   Estado nutricional e produção de bananeiras ‘Prata-anã’ (AAB) e ‘BRS Platina’ (AAAB) com fertilização orgânica   RESUMO: Objetivou-se esta pesquisa avaliar o estado nutricional e o rendimento de bananeiras 'Prata' com diferentes fontes de fertilização para manejo orgânico em solos com fertilidade melhorada. Duas cultivares ('Prata-Anã' e 'BRS Platina'), cinco doses anuais de potássio (0, 200, 400, 600 e 800 kg ha-1 de K2O) fornecidas por meio de esterco bovino e pó de rocha, e seis períodos (210, 390, 570, 750, 930 e 1.110 dias após o transplantio), distribuídos em delineamento de blocos ao acaso, em esquema fatorial 2 x 5 x 6 com três repetições. O rendimento foi determinado por três ciclos. Os teores de K e S nas folhas aumentaram com aumento das taxas de K2O em interação com os períodos de avaliação. Os níveis de N, P e Cu aumentaram com o aumento das doses de K2O. A alta fertilidade do solo e as aplicações de esterco e pó de rocha não são suficientes para manter os níveis adequados de Mn em ‘Prata-Anã’. Os teores de K, S, Cu e Zn na cultivar Prata-Anã diferem de ‘BRS Platina’. O esterco e o pó de rocha como fertilizantes orgânicos não aumentam o rendimento das bananeiras ‘Prata’ cultivadas em solos com fertilidade melhorada durante quatro ciclos de produção. Palavras-chave: Musa spp.; análise de tecido foliar; rendimento.

This study aimed to fit regression models for harvest prediction in Prata type bananas. The experiment consisted of plants and bunches of bananas carried out in Guanambi, BA, with genotypes Dwarf Prata (AAB) and BRS Platina (AAAB), planted at a spacing of 3.0 × 2.5 m, with irrigation. Measurements of vegetative and yield characteristics were sampled at random. Models of simple and multiple linear regression were estimated, considering as independent variables with highest correlation coefficients with the masses of the bunch (MB) and hands (MH). The simple linear regression models allow prediction of the masses of the bunch and hands, according to the number of hands (NB), with better precision, for both genotypes and at least 120 days prior to harvest. For the' Dwarf Prata', the equations were: MCA = -10.05 + 3.08NH; r² = 0.99, e, MPE = -12.38 + 3.55NH; r² = 0.99. For the 'BRS Platina' equations were: MCA = -1.37 + 3.02NH; r² = 0.97 e MPE = -2.74 + 2.88NP; r² = 0.97. The determination coefficients for the adjusted models ensure consistency of the regressions for the estimation of Prata type banana production.

The aim of this paper is to evaluate gas exchanges and yield of Prata-type banana plants subjected to fertilizer sources for organic management in soil with improved fertility. Two cultivars ('Dwarf-Prata' and 'BRS Platina'), 5 K 2 O rates (0, 200, 400, 600, and 800 kg ha -1 year -1 ) supplied by cattle manure and Naturalplus ® rock powder, and 2 evaluation times (8:00 am and 2:00 pm) were arranged in a randomized complete block design with 15 replicates. As for production, a randomized block design with 4 cycles and 3 replicates was used. In fertile soils, gas exchanges are little influenced by fertilization. Fertilization with increasing application rates determines a quadratic variation in stomatal conductance and internal CO 2 concentration in 'Dwarf-Prata' and a linear variation for leaf temperature and instantaneous water-use efficiency in 'BRS Platina'. Quantum efficiency of photosynthesis is higher at 8:00 am, whereas at 2:00 pm, for leaf temperature. Photosynthesis and leaf transpiration directly correlate with stomatal conductance, instantaneous water-use efficiency, and leaf temperature, while instantaneous water-use efficiency and photosynthesis inversely associate with transpiration and leaf temperature. Cattle manure and rock powder fertilizations do not increase yield in banana plants grown in soils with improved fertility.

Objetivou-se com este trabalho avaliar o estado nutricional e características agronômicas de bananeiras tipo prata sob adubação orgânica, no quarto ciclo de produção, em solos de elevada fertilidade construída. Os tratamentos, duas cultivares (Prata-Anã e BRS Platina) e cinco doses de adubação compostas por esterco bovino e farinha de rocha Naturalplus® foram dispostos em esquema fatorial 2 x 5, em delineamento em blocos casualizados, com três repetições. Foram avaliados: os teores de nutrientes nas folhas; altura de plantas; perímetro do pseudocaule; número de folhas; massa do cacho (kg) e pencas (kg); massa média das pencas (kg) e fruto (g) e massa das cinco primeiras pencas (kg); número de pencas; número de frutos por cacho e penca; massa (g), diâmetro (mm) e comprimento interno e externo do fruto (cm). Doses crescentes de K2O incrementam os teores de N, P e Cu para cultivares Prata-Anã e BRS Platina, que diferem entre si quanto aos teores de Fe, Zn e S. A ‘Prata-Anã’ se destaca com número de folhas e frutos por penca, enquanto a ‘BRS Platina’ maior massa média das pencas e do fruto e comprimento do fruto. As doses aplicadas não influenciam a produção das cultivares BRS Platina e Prata-Anã no quarto ciclo em solos de elevada fertilidade construída.Palavras chave: farinha de rocha; esterco bovino; sustentabilidade. PHYTOTECHNICAL AND NUTRITIONAL CHARACTERISTICS OF BANANA SUBMITTED TO FERTILIZER SOURCES FOR ORGANIC MANAGEMENT ABSTRACT:The objective of this work was to evaluate the nutritional status and agronomic characteristics of silver - type banana under organic fertilization, in the fourth cycle of production, in soils with high fertility. The treatments, two cultivars (Prata-Anã and BRS Platina) and five fertilizer doses composed of bovine manure and Naturalplus® rock flour were arranged in a 2 x 5 factorial scheme, in a randomized block design, with three replications. Leaf nutrient contents were evaluated; plant height; perimeter of the pseudostem; number of leaves; mass of the bunch (kg) and hands (kg); average mass of the hands (kg) and fruit (g) and mass of the first five hands (kg); number of leaves; number of fruits per bunch and hands; mass (g), diameter (mm) and internal and external length of the fruit (cm). Increasing doses of K2O increases N, P and Cu contents for Prata-Anã and BRS Platina cultivars, which differ in Fe content, Zn and S. The ‘Prata-Anã’ stands out with the highest number of leaves and fruits per hands, whereas the 'BRS Platina' presents higher average mass of the fruit and the length of the fruit. The applied doses do not influence the production of the cultivars BRS Platina and Prata-Anã in the fourth cycle in soils with high constructed fertility.Keywords: rock dust; bovine manure; sustainability.

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The objective of this work was to establish, through different diagnostic methods, nutrient reference values for ‘Prata-Anã’ banana in improved fertility soil. The study included a database from an experiment conducted in randomized block design, arranged in a 5 × 6 factorial scheme (five doses of K2O - 0; 200; 400; 600 and 800 kg ha-1, supplied by cattle manure and rock powder × six evaluations of leaf nutrition and yield – 210; 390; 570; 750; 930 and 1,110 days after planting), with three replicates, totaling 90 samples. The reference values were determined by the Sufficiency Range, Critical Level by the Reduced Normal Distribution, Boundary Line and Mathematical Chance methods. Plots with high yield, = 36.42 t ha-1 cycle-1, formed the reference population and plots with yield = 45.79 t ha-1 formed the reference subpopulation. The methods were efficient in determining the nutrient reference values of ‘Prata-Anã’ banana. In general, the values established are higher than those reported in the literature, justified by the greater chemical fertility of the soil. Among the diagnostic methods, the Mathematical Chance presented itself as the most accurate for interpreting the nutrient contents in the leaves of ‘Prata-Anã’ banana under improved soil fertility conditions.