Topdressing N fertilization on productivity and nutritional status of common bean crop

The present study aimed to compare sources and doses of N on productivity, nutritional status and commercial quality of bean (Phaseolus vulgaris) crop. The treatments consisted of the following N doses: 60, 90 and 110 kg N/ha. The sources were YaraLiva Nitrabor (390, 585 and 715 kg ha-1) and Urea (130, 195 and 240 kg ha-1). Both sources and doses were applied before or after 15 mm irrigation. In case of fertilizers application after 15 mm irrigation, 1 mm of water was applied after application only to lightly soak granules, which was called “drizzle”, simulating a low-intensity rain after fertilizer application. The experiment was designed as randomized block with four replications in a factorial scheme (2x3x2) + 1, during 113 days with sowing on 06/25/2018 and harvest on 10/18/2018. BRS Estilo was the cultivar used in this study. Application of calcium nitrate in moist soil followed by drizzle provide gains around 5.48 kg of bean per kg of topdressing N, while urea provides gains of 2.22 kg of bean per kg of topdressing N