Produção de nabo japonês fertirrigado com nitrogênio na região de Dourados

Abstract

The turnip (Raphanus sativus L. var. acanthiformis) cultivation has great importance, considering that can replace potato and cassava, making it a financial gain to vegetable crop potential in the market. Knowing the amount of nutrient uptake in the plant, provides important information that can help in the fertilization program of culture, that is scant and few available information for this species. The objective of this research was to evaluate the effect of different doses of nitrogen applied by fertigation in japanese turnip cultivation in a Hapludox at Dourados-MS area. The experiment was conducted in the irrigation area of the Federal University of Grande Dourados (UFGD) in Dourados - MS. It was used the experimental design a randomized block. The treatments were nitrogen rates (0, 40, 80, 120 and 160 kg ha-1), broken down into three applications, and at 15, 45 and 60 days after planting. The source of nitrogen was urea (45% N). Plants were harvested at 84 days after planting and agronomic and commercial variables were fresh mass of leaves, dry weight of leaves, leaf nitrogen content, turnip long, turnip diameter and mass turnip, evaluating 10 plants of each plot. The results indicated that the N dose increase resulted in increased dry matter, in the rate of dry matter production of culture, productivity and N accumulation in turnip plants.