02074nam a2200265 a 450000100080000000500110000800800410001902200140006010000200007424501470009426002010024152011050044265000230154765000220157065000250159265000270161765300200164470000190166470000200168370000200170370000260172370000190174970000180176870000220178620862652018-01-24       2017    bl uuuu     u00u1 u    #d  a1983-43571 aSILVA, D. S. M.  aAnimal performance in pastures of Ipyporã brachiariagrass (B. ruziziensis and B. brizantha) under continuous stocking.h[electronic resource]  aIn: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 54., 2017, Foz do Iguaçu. A new view of animal science: challenges and perspectives: Proceedings. Foz do Iguaçu: SBZ, 2017. p. 538.c2017  aThe large amount of agriculture area and the weather contribute with the based-pasture livestock production systems in Brazilian Amazon. Actually, the high demand for animal protein with quality increases productivity and profitability challenge´s. Focus on that, animal production research aim to identify and apply new technologies to improve livestock productivity. The objective with this study was to evaluate Nellore performance in pastures of Ipyporã brachiariagrass in Amazon biome. The experiment was carried out at Embrapa Agrossilvipastoril, from June/2016 to February/2017, and analyzed in two seasons: dry (June-October) and rainy (November/2016-February/2017). The experimental design was in randomized complete blocks with two treatments (hybrids: BRS RB331 Ipyporã and Mulato II) and four replications. The experimental area were divided into 8 paddocks with 1.5 ha each, totalizing 12 hectares. For performance evaluation, 24 not castrated Nellore steers (tracers), an average, with initial weights of 250 kg and 12 months of age were weighed every 28 days, after 16 h of fasting.  aAnimal performance  aAnimal production  aUrochloa ruziziensis  aBrachiaria Ruziziensis  aDiversification1 aMOMBACH, M. A.1 aCARVALHO, P. de1 aSOUZA, R. da S.1 aCARVALHO, A. P. da S.1 aPEREIRA, D. H.1 aCABRAL, L. S.1 aPEDREIRA, B. C. e