Aplicação foliar de Sílicio e Aminoácidos em abacaxi .

Abstract

The use of amino acids (aa) in agriculture has been practiced for several decades, in various crops. Despite the reported benefits of using these products, there is controversy about the use of amino acids, since their isolated application does not always show significant effects on plant productivity. Similarly, silicon (Si) is a beneficial element known to alleviate biotic and abiotic stresses, in addition to improving plant growth and productivity in the absence of stress. However, there is a lack of research on pineapple crops. The objective was to evaluate the vegetative development, productivity and quality of ‘Pérola’ pineapple as a result of the foliar application of aa and Si, in isolation and in combination. The planting of seedlings of the type pup was carried out on 06/01/2023. The treatments were applied via foliar application, once a month, starting in the first month after planting, totaling 6 applications. The treatments were: amino acids at the recommended dose (aa100%), Si at the recommended dose (Si100%), the combination of aa and Si, both at half the recommended dose (aaSi50%), the combination of aa and Si, both at the recommended dose (aaSi100%) and the control, without application. A randomized block experimental design (RBD) was used, with 4 replicates. The recommended dose of Si was 40 mmol L-1. The Si source was potassium silicate stabilized with sorbitol – 115 g L -1 of Si and 113.85 g L -1 of K2O. K2O was balanced between treatments with KCl. The aa dose used was 1 L ha -1 of the commercial product. In the vegetative phase, the length of the diagnostic leaf (D leaf) was evaluated, and at the end of the crop cycle, 14 months after planting, the fresh mass of the fruits, total soluble solids (°Brix) and total titratable acidity were evaluated. The treatments did not influence the vegetative and reproductive development of the pineapple. In conclusion, the foliar applications of aa and Si, alone or in combination, did not alter the vegetative and reproductive development and quality of ‘Pérola’ pineapple.