Original Research

The effect of dietary protein on reproduction in the mare. I. The composition and evaluation of the digestibility of dietary protein from different sources

F.E. Van Niekerk, C.H. Van Niekerk
Journal of the South African Veterinary Association | Vol 68, No 3 | a880 | DOI: https://doi.org/10.4102/jsava.v68i3.880 | © 1997 F.E. Van Niekerk, C.H. Van Niekerk | This work is licensed under CC Attribution 4.0
Submitted: 13 July 1997 | Published: 13 July 1997

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F.E. Van Niekerk,
C.H. Van Niekerk,

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Abstract

Four rations that differed in their crude protein and essential amino-acid content were compiled. Digestibility of the crude protein and essential amino-acid contents were determined biologically in a feeding trial using 4 Anglo-Arab stallions. Their respective daily diets were: Diet 1: 2 kg cubes, 5 kg tef hay (Eragrostis tef); Diet 2: 2 kg cubes, 5 kg lucerne hay (Medicago sativa); Diet 3: 2 kg cubes, 5 kg tef hay, 200 g fishmeal; Diet 4: 2 kg cubes, 5 kg lucerne hay, 200 g fishmeal. The concentrations of the amino-acids threonine, iso-leucine, leucine and arginine were increased in the total ration when lucerne hay replaced the tef hay while fishmeal supplementation increased the methionine and lysine contents, which provided a wide range of concentrations of digestible amino-acids in each of the 4 rations.

Keywords

Amino-Acids; Equine; Nutrition

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