EFFICIENCY OF DIETARY NITROGEN UTILIZATION AND DIGESTIVE METABOLISM OF DAIRY COWS FED DIFFERENT NITROGEN SOURCES AND SUGARCANE - J. R. Naves; E. F. de Jesus; C. M. M. R. Martins; T. Tomazi; J. E. de Freitas Junior; F. P. Rennó; M. V. Santos (Journal of Animal and Plant Sciences, 2015)