Abstract
This study evaluated the influences of nitrogen fertilizer and energy supplementation cattle on the growth performance of beef cattle. This study was conducted at the Federal University of Technology of Paraná, Dois Vizinhos through continuous grazing on 6.3ha, divided into nine paddocks. The treatments were: Alexander grass +100kgha-1 of N (N100); Alexander grass +100kgha-1 of N+0.5kg per 100kg of weight live supplementation of wheat bran (N100S); and Alexander grass +200kgha-1 of N (N200), with an average herbage allowance of 10% for all treatments. Crossbred and non-castrated steers with an average weight of 276±41kg were used for 107days. The crude protein from entire plant differed (P<0.05) between treatments, with the greater value (14.8%) occurring in the N200, and the lesser value (13.3%) occurring in the N100S. The herbage accumulation rate was greater (P<0.05) in the N200 (55.7DMha-1d-1) than that in the N100S and N100 (40.0 and 39.7kgDMha-1d-1, respectively). The N100S produced greater (P<0.05) average daily weight gains (0.815kganimalday-1) than did the N200 (0.685kganimalday-1) and N100 treatments (0.727kganimalday-1).
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