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- W1566782408 abstract "Nutrient requirements of beef cattle in Brazil: challenges Feeding has a large impact on production costs. The nutrient requirements by animals have been widely studied and several feeding systems were developed considering the particularities of each production system. Energy and protein requirements have been determined using the comparative slaughter technique and the main national results, which allowed the development of a nutrient requirement system for Zebu in Brazil, will be presented in this review. Nonetheless, there is a number of challenges, which, once resolved, can significantly contribute to the development of even more accurate and robust feeding systems. Among them, the determination of the variable efficiency of use of metabolizable energy, energetic costs related to physical activity, effect of restricted feeding, impact of animal performance on energetic cost of tissue synthesis and the bovine aminoacid requirements are relevant. Further studies need to be carried out to increase the data base and fill existing gaps, allowing new meta-analysis to continually update and evaluate models in the future ." @default.
- W1566782408 created "2016-06-24" @default.
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- W1566782408 date "2009-07-01" @default.
- W1566782408 modified "2023-09-23" @default.
- W1566782408 title "Exigências nutricionais de bovinos de corte no Brasil: desafios" @default.
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