Adubação N-K No Abacaxizeiro ‘Brs Imperial’ – Ii Efeito No Solo, Na Nutrição Da Planta E Na Produção

Abstract

RESUMO-o abacaxizeiro 'BRS imperial' é uma cultivar resistente à fusariose, apresenta frutos saborosos, mas ainda é pouco conhecido dos fruticultores. este trabalho teve como objetivo avaliar o efeito de diferentes doses de n e K nas características químicas do solo, nos teores foliares de nutrientes e nas variáveis de produção de um cultivo de 'BRS imperial'. o experimento foi instalado no espaçamento 0,90 x 0,40 x 0,40 m, com quatro doses de n (0; 160; 320 e 550 kg ha NK FERTILIZATION IN 'BRS IMPERIAL' PINEAPPLE -II -VARIABLE OF PLANT PRODUCTIONABSTRACT -the 'BRS imperial' pineapple is a resistant cultivar to Fusarium and it presents tasty fruit, but it is still little known by farmers. This study aimed to evaluate the influence of N and K fertilization on chemical soil characteristics, leaves nutrient contents and yield of 'BRS imperial' plants. the experiment was installed at a 0.90 x 0.40 x 0.40 m spacing and four doses of n (0, 160, 320, 550 kg ha -1 ) and K 2 o (0, 240, 480 and 600 kg ha -1 ) were tested in a completely randomized blocks design with five replicates, in a 4 x 4 complete factorial scheme. Chemical analyzes were made of leaves and soil and measured the production variables. the cultivation of pineapple in a complete absence of n and K fertilization resulted in lower ph, K + , Ca 2+ and Mg 2+ levels of soil in relation to the initial content. even at the highest dose of K 2 o, the K level in the soil was low after the pineapple cultivation. the maximum n and K foliar content, estimated on the higher doses, were 13 g kg -1 and 32 g kg -1 , respectively. Crop variables showed significance for N levels in all evaluations, while the rates of K 2 O influenced only the length/diameter fruit relation. In a quadratic regression, n doses showed 1,086 g on fruit weight with crown at 365 kg ha -1 of n and a yield of 42 t ha -1 .

Organomineral Fertilizer in Pineapple Cultivars in the Acclimatization Stage of Seedlings Produced “In vitro”

“…The comparative nutritional behavior among the cultivars is not described in the literature. The values found in this study agree with several studies for the cultivation of pineapple seedlings, except for calcium content (Prado et al [ [20]) and lower than those found by [4].…”

Growth of leaf D and productivity of ‘Imperial’ pineapple as a function of nitrogen and potassium fertilization

“…Imperial. Oliveira et al (2015c) working with the same cv., reported an estimated yield of 42 t ha -1 and fruit weight with and without crown of 1086 g and 967 g, respectively, at the maximum physical doses of 365 and 374 kg ha -1 of N. For Pineapple Gold, the expression of maximum capacity according to Guarçoni & Ventura (2011), yields of 650.6 and 735.9 kg ha -1 of N and K 2 O, respectively, with yield of 65.4 t ha -1 were obtained.…”

Phenotypic correlation between leaf characters and physical and chemical aspects of cv. Vitória pineapple fruit

“…Correlation in statistics is a widely used tool since it allows the quantitative evaluation of the relevance of one characteristic in relation to the other. Oliveira et al (2015), when studying the Pearson's correlation coefficients in the production characteristics of the 'BRS Imperial' pineapple, reported that the significant negative correlation with a higher coefficient of correlation (-0.77) indicates the possibility that the length of the fruit exerts a greater influence on the smallest crown mass than the diameter (-0.45) and mass of the fruit (-0.56). In other words, they concluded that the larger the mass of the fruit, the greater its diameter and length, and the smaller the crown.…”