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Effect of energy intake on performance, nutrient and tissue gain and protein and energy utilization in growing boars

Published online by Cambridge University Press:  02 September 2010

N. Quiniou ,
J. Noblet ,
J. van Milgen  and
J.-Y. Dourmad
N. Quiniou
Affiliation:
Station de Recherches Porcines, Institut National de la Recherche Agronomique, 35590 St-Gilles, France
J. Noblet
Affiliation:
Station de Recherches Porcines, Institut National de la Recherche Agronomique, 35590 St-Gilles, France
J. van Milgen
Affiliation:
Station de Recherches Porcines, Institut National de la Recherche Agronomique, 35590 St-Gilles, France
J.-Y. Dourmad
Affiliation:
Station de Recherches Porcines, Institut National de la Recherche Agronomique, 35590 St-Gilles, France
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Abstract

Twenty crossbred (Large Wliite × Piétrain) boars were used to investigate the effect of energy intake (0·71, 0·80, 0·90, 1·00 ad libitum) and body weight (BW) on growth performance, and rates of protein (PD) and lipid (LD) deposition between 40 and 100 kg BW. Daily crude protein intake was kept constant. Total PD and LD were measured according to the comparative slaughter technique (CST) during total experiment and according to nitrogen and energy balance technique at 45, 65, 80 and 94 kg mean BW. Average daily gain increased linearly with metabolizable energy (ME) intake (+36 g/MJ ME) whereas food conversion ratio was not affected by energy level (28·0 M] ME per kg BW gain). Daily PD increased from 126 to 171 g/day, and LD from 70 to 187 glday between 0·71 ad libitum and ad libitum ME intake. Maintenance ME requirement was constant when expressed per kg BW'60 (992 kJ/day). PD varied with ME intake above maintenance (MEp) according to a linear-plateau relationship. The slope decreased with BW (+11·5 g/MJ MEp at 65 kg BW and +9·0 g/MJ MEp at 94 kg BW). LD was linearly related to MEp (+16 g/M} MEp). The LD: PD ratio in marginal empty BW gain was constant within BW class, but increased from 1/5 to 1/9 between 65 and 94 kg BW.

Keywords

body weightenergy intakelipid metabolismpigsprotein utilization

Information

Type
Research Article
Information
Animal Science , Volume 61 , Issue 1 , August 1995 , pp. 133 - 143
Copyright
Copyright © British Society of Animal Science 1995

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