Doses de nitrogênio em cultivares de cebola no Norte de Mato Grosso

Abstract

The onion (Allium Cepa ) is one of the vegetables most consumed in the world. For your cultivation, it is essential the use of N in fertilization because is the element most required for the plant in the early stages of development. Thus with the completion of this study aimed to evaluate growth parameters, development, commercial productivity, total productivity, fresh weight, total acidity, soluble solids and commercial classes of onion bulbs under different doses of nitrogen, in Mato Grosso. The experiment was conducted in the experimental area of the campus UFMT during the period may to November 2015. The experimental design will be a be ing used blocks at random in 4X2 factorial scheme with four replications. The treatments consisted of the combination of 4 N rates (150, 200, 250 and 300 kg/ha -1 de N) and 2 cultivars (Baia Periforme and Texas Grano 502). The increase of N rates reflected positively obtaining better responses to the doses 300 and 250 kg/ha -1 N) for total productivity, commercial productivity and fresh weight. Already the doses 150 and 200 kg/ha -1 N had better response to total acidity, soluble solids and commercial class 3. The cultivar Texas Grano 502 was highest to Baia Periforme with respect to total productivity, commercial productivity and fresh weight. However, the Baia Periforme was better in qualitative parameters total acidity and soluble solids. Besides that, obtained the highest percentage of bulbs in class 3 which is the best economic return.