Energy-protein supplementation before and after parturition of Nellore primiparous cows in the Brazilian tropical savannah ; Suplementación de energía y proteína antes y después del parto de vacas primiparias Nellore en la sabana tropical brasileña ; Suplementação proteico-energética antes e após o parto para vacas primíparas Nelore na savana tropical brasileira

Reproduction is associated to the profitability of beef herds, which affects the level of productivity and is influenced by nutritional level. The objective of this study was to evaluate the effect of protein and energy supplementation, before and after parturition, on reproductive variables of Nellore primiparous cows extensively raised in the Brazilian tropical savannah. Eighty pregnant heifers with parturition estimated for a 45 d period during the dry season were randomly divided into four treatments: Control, received a mineral salt and urea mixture pre and postpartum; PRE, protein-energy... Mehr ...