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Revista Brasileira de Fruticultura

versão impressa ISSN 0100-2945

Resumo

TEIXEIRA, Luiz Antonio Junqueira; QUAGGIO, José Antonio; CANTARELLA, Heitor  e  MELLIS, Estêvão Vicari. Potassium fertilization for pineapple: effects on plant growth and fruit yield. Rev. Bras. Frutic. [online]. 2011, vol.33, n.2, pp.618-626. ISSN 0100-2945.  http://dx.doi.org/10.1590/S0100-29452011000200035.

A field experiment with pineapple (Smooth Cayenne) was carried out on an Ultisol located in the city of Agudos (22º30'S; 49º03'W), in the state of São Paulo, Brazil, with the objective of investigating the effects of rates and sources of potassium fertilizer on plant growth and fruit yield. The experiment was a complete factorial design (4x3) with four rates (0, 175, 350, and 700 kg ha-1 of K2O) and three combinations of K sources (100% KCl, 100% K2SO4, and 40% K2SO4 + 60% KCl). Plant growth and fruit yield were evaluated. Biomass accumulation of pineapple plants was impaired by chlorine added with potassium chloride. Fruit yield increased with potassium fertilization. At high rates of K application, fertilization with K2SO4 showed better results than with KCl. Detrimental effects of KCl were associated with excess of chlorine.

Palavras-chave : potassium chloride; potassium sulphate; Ananas comosus; K.

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