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Mammary gland development in heifers under different metabolizable protein and metabolizable energy ratios

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Energy and protein metabolism and nutrition in sustainable animal production

Abstract

Mammary development is affected by nutrient intake, which affects the intensity of weight gain. There are several ways to evaluate mammary development, but almost all involve the slaughter of the animals. On other hand, other studies have been conducted with ultrasound to evaluate fat deposition on lean tissue (Wertz et al., 2002). This experiment was designed to evaluate dry matter intake, performance, and mammary gland development in Holstein heifers under different metabolizable protein and metabolizable energy ratios.

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References

  • National Research Council (NRC). 2001. Nutrient Requirements of Dairy Cattle. 7th ed. National Academy Press, Washington, DC.

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Correspondence to M. I. Marcondes .

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James W. Oltjen Ermias Kebreab Hélène Lapierre

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© 2013 Wageningen Academic Publishers The Netherlands

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Albino, R.L., Marcondes, M.I., Gomes, B.C., Pereira, L.G.R., da Silva, T.E., Trece, A.S. (2013). Mammary gland development in heifers under different metabolizable protein and metabolizable energy ratios. In: Oltjen, J.W., Kebreab, E., Lapierre, H. (eds) Energy and protein metabolism and nutrition in sustainable animal production. Energy and protein metabolism and nutrition in sustainable animal production, vol 134. Wageningen Academic Publishers, Wageningen. https://doi.org/10.3920/978-90-8686-781-3_26

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