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Dietary factors affecting the maximum feed intake and the body composition of pre-ruminant kid goats of the Granadina breed

Published online by Cambridge University Press:  09 March 2007

M. R. Sanz Sampelayo ,
L. Allegretti ,
I. Ruiz Mariscal ,
F. Gil Extremera  and
J. Boza
M. R. Sanz Sampelayo
Affiliation:
Estación Experimental del Zaidín (Consejo Superior de Investigationes Científicas), Departamento de Nutrición Animal, Profesor Albareda 1, 18008 Granada, Spain
L. Allegretti
Affiliation:
Estación Experimental del Zaidín (Consejo Superior de Investigationes Científicas), Departamento de Nutrición Animal, Profesor Albareda 1, 18008 Granada, Spain
I. Ruiz Mariscal
Affiliation:
Estación Experimental del Zaidín (Consejo Superior de Investigationes Científicas), Departamento de Nutrición Animal, Profesor Albareda 1, 18008 Granada, Spain
F. Gil Extremera
Affiliation:
Estación Experimental del Zaidín (Consejo Superior de Investigationes Científicas), Departamento de Nutrición Animal, Profesor Albareda 1, 18008 Granada, Spain
J. Boza
Affiliation:
Estación Experimental del Zaidín (Consejo Superior de Investigationes Científicas), Departamento de Nutrición Animal, Profesor Albareda 1, 18008 Granada, Spain
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Abstract

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An experiment was carried out with kid goats of the Granadina breed to identify the dietary factors affecting voluntary feed intake of the kid goat and those that additively could determine its body composition. The animals used were from birth to 61 d of age, fed ad lib. on different milk replacers containing 200, 240 and 280 g crude protein/kg DM and 200, 240 and 280 g fat/kg DM, thus giving nine dietary treatments. The utilization of the milk replacers and the animals' body composition were determined by balance and slaughter trials. There were significant positive effects of protein concentration of the milk replacers on component digestibilities, energy metabolizability, feed intake, empty-body weights, empty-body composition and protein and fat retention. The concentration of fat in the milk replacers also had a significant positive effect on the digestible and metabolizable energy concentration of the diets and on fat retention. The relationships existing between feed intake and diet composition (concentration of digestible protein, metabolizable energy and digestible protein:metabolizable energy ratio) as well as between empty-body composition or protein and fat retention and diet composition, were examined. From these it was deduced that feed intake was significantly influenced by the digestible protein concentration of the diets. The higher the digestible protein concentration the higher the feed intake up to a maximum digestible protein concentration value. As the digestible protein concentration of the diets was the dietary factor which significantly influenced feed intake, this also significantly influenced the body composition and the protein and fat retention. The protein concentration of the feed at which metabolizable energy intake in these animals would be greatest was estimated to be 347 g/kg DM.

Keywords

Feed compositionFeed intakeBody compositionKid goats
Type
Feed intake in Granadina goat kids
Information
British Journal of Nutrition , Volume 74 , Issue 3 , September 1995 , pp. 335 - 345
Copyright
Copyright © The Nutrition Society 1995

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