Pesquisa Agropecuária Brasileira (Apr 2018)

Macromineral requirements of Holstein calves

  • João Paulo Pacheco Rodrigues,
  • Jéssika Carolina Moutinho Lima,
  • Marcelo Messias Duarte Castro,
  • Sebastião de Campos Valadares Filho,
  • Mario Luiz Chizzotti,
  • Mariana Magalhães Campos,
  • Fernanda Samarini Machado,
  • Marcos Inácio Marcondes

DOI
https://doi.org/10.1590/s0100-204x2018000400015
Journal volume & issue
Vol. 53, no. 4
pp. 522 – 525

Abstract

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Abstract: The objective of this work was to quantify the net requirements for the maintenance (NRm) and growth (NRg), as well as the retention coefficient (RC) of calcium, phosphorus, sodium, potassium and magnesium, of Holstein calves. The NRm were 87.8, 20.8, 4.36, 2.21, and 1.01 mg kg-1 of empty body weight for Ca, P, Na, K, and Mg, respectively. The RC was 0.882, 0.473, 0.274, 0.088, and 0.052 for Ca, P, Na, K, and Mg respectively. The requirements of Ca and P of Holstein calves are higher than those estimated for adult animals.

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