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Effects of Acute Changes in the Energy and Protein Intake Levels over the Short-term on the Maternal Milk Amino Acid Concentrations in Lactating Mares

Matsui, A.    (Equine Science Division, Hidaka Training and Research Center, Japan Racing Association   ); Inoue, Y.    (Equine Science Division, Hidaka Training and Research Center, Japan Racing Association   ); Asai, Y.    (Equine Science Division, Hidaka Training and Research Center, Japan Racing Association  );
  • 초록

    This study was designed to test the effects of changes in energy and protein intake levels on the maternal milk amino acid concentrations over the short-term in lactating mares. Three lactating mares were enrolled for the study 7 weeks after parturition. A low-energy and low-protein diet (LEP) was administered during the first week of the study, followed by administration of a high-energy and high-protein diet (HEP), again for a week (day 1 to day 7), and milk was sampled thrice daily at intervals of 8 h during the study period. The mean amino acid concentrations in the maternal milk, except for those of proline, serine and valine, were significantly higher in the HEP feeding period than during the LEP feeding period (p ${\pm}$ 26.9 and 1,542.3 ${\pm}$ 36.0 mg/100 g, respectively, the difference between the two was not significant. When the ratio of each amino acid concentration to the TAA in the maternal milk was analyzed, there were significant differences between the HEP and LEP feeding periods for all amino acids, except glycine, serine, alanine and histidine. It was found that the concentrations of glutamic acid+glutamine, serine, threonine, arginine and valine were significantly higher (p


  • 주제어

    Amino Acids .   Milk .   Lactating .   Mare.  

  • 참고문헌 (27)

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