Produção, fisiologia e qualidade do abacaxizeiro (Ananas comosus L. var. comosus) cv. BRS Imperial sob relações K/N no litoral da Paraíba

Abstract

Pineapple farming is an economically viable and socially relevant activity in the exploration regions. However, its success depends on nutritional management with adequate K / N ratios. The objective of this study was to evaluate the effects of different K/N ratios, applied via soil and leaf on nutritional status, phenology of leaf "D" and infructescence, production and quality of pineapple cv. Infructescence, in the State of Paraíba. The experiment was installed in Quartzarênico Neosol, in the municipality of Alhandra-PB. In order to evaluate soil fertility, plant nutrition, leaf "D" growth and infructescence development, the experimental design was a randomized complete block design, with four replications and ten treatments, in a factorial scheme (2x4 + 2). The factors were two levels of N (585,9 and 498,0 kg of N ha-1) and four K/N ratios (1.3: 1, 2: 1, 2.5: 1 and 3: 1) , and two treatments (50% potassium via soil and 50% via leaf). The experimental unit consisted of five rows, each row with 12 plants, with a total of 60 plants per experimental unit. Acclimated seedlings of the Imperial pineapple cultivar from in vitro propagation, planted in pits, were used in the simple rows system, spacing 0,30 x 0,90 m.