DESEMPENHO DO FEIJOEIRO COMUM IRRIGADO SOB DOSES E ÉPOCAS DE APLICAÇÃO DE POTÁSSIO FOLIAR

Abstract

A food rich in iron and protein, beans (Phaseolus vulgaris L.) is one of the most cultivated crops in Brazil and in the world, serving as a food and nutritional security factor with the potential to eradicate hunger and malnutrition. Among the factors that influence productivity, mineral nutrition stands out as one of the most relevant, with potassium playing a fundamental role. The objective of the work was to evaluate the performance of common beans grown with different potassium dosages, applied in two phenological stages. The experiment was carried out in a randomized block design, in a factorial scheme five (potassium doses) x two (phenological stages), with four replications, under field conditions. The different doses of potassium (0 Kg ha-1, 0,2 Kg ha-1, 0,4 Kg ha-1, 0,6 Kg ha-1 and 0,8 Kg ha-1) were applied in coverage at the phenological stages R7 and R8, using the product Liqui-Plex Finish. The evaluations were: plant height, number of pods per plant, number of grains per pod, mass of a thousand grains and productivity. The time of application did not interfere with the production data, as opposed to the potassium dosages, which showed significant interaction in the production. Until the dosage of 0,410 kg ha-1 there was an increase in productivity, reaching its maximum value of 4,145.22 kg ha-1. Conversely, above that dosage, productivity decreased. Similar behavior occurs with the weight of a thousand grains, which had a maximum weight of 285.06 g at a dosage of 0,460 kg ha-1.