Effect of genetic line on energy and nitrogen metabolism during late gestation in twin-pregnant ewes fed restrictedly

A. Kiani, A. Chwalibog, M. Nielsen, A. Tauson
2004 Journal of Animal and Feed Sciences  
Nitrogen and energy metabolism were measured in balance and respiration experiments performed seven weeks before expected lambing in twenty twin-pregnant ewes from two genetic lines: high average daily gain (Gain) and slaughter quality (Lean). Ewes were grouped according to liveweight (LW): heavier (Heavy) and lighter (Light) than the average for the genetic line. All animals were fed restrictedly, about 70 % of their energy requirements. Selection for slaughter quality rather than high daily
more » ... r than high daily gain increased apparent crude protein digestibility (77.9 vs 81.1% for Gain and Lean, respectively, P<0.05), but neither genetic line nor LW affected other parameters of quantitative nitrogen and energy metabolism.
doi:10.22358/jafs/73952/2004 fatcat:yglwnewuavbwtj6hfbxsxoqz7e