La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	The digestibility of raw and processed soybeans by Helmeted Guineafowl, Numida meleagris
Auteurs :	C. S. Ratcliffe, Auteur ; R. M. Gous, Auteur ; H. K. Swatson, Auteur ; T. M. Crowe, Auteur
Type de document :	Article
Dans :	Ostrich (73(3-4) SEP 2002)
Article en page(s) :	135-137
Langues:	Anglais
Résumé :	Helmeted Guineafowl, Numida meleagris, populations have declined significantly within the Midlands of KwaZulu-Natal since the early 1980s. Because guineafowl have been observed feeding on harvested soybean lands and because raw soybeans are known to contain anti-nutritional factors, research into the digestibility of raw soybeans was conducted to investigate possible localized factors in suppressing populations of these birds. A digestibility study was carried out on the apparent metabolizable energy (AME) and the amino acids of both raw and processed soybeans, as well as a number of other feed ingredients, using Helmeted Guineafowl and adult roosters, Gallus gallus, as a control. The results of the energy balance studies were similar for both the guineafowl and the roosters. Soybean, both raw and processed, was found to be comparable with the other feed ingredients in terms of the digestibility of gross energy, but the amino acid digestibility of raw soybeans was considerably lower than that of processed soybean oilcake meal. The availability of raw soybean may thus only be contributing to localized dietary constraints within guineafowl populations.

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