Effect of dietary protein and lysine concentration on performance and energy utilization of growing pigs
Noblet, J.; Henry, Y.; Dubois, S.
19 emes Journees de la recherche porcine en France 1987: 259-264
From 20 to 55 kg body weight, except for littermates killed initially, 32 female Large White pigs had at 120 g/kg0.75 a pelleted diet based on maize and soya with 17.8, 15.3 or 15.3% crude protein and, respectively, 0.81, 0.67 and 0.80% lysine. With reduced protein and lysine, gain in bodyweight and in weight of ham, loin and muscle tissue decreased, weight gain of fatty portions and tissues increased and energy efficiency decreased significantly. With low protein and added lysine growth was similar to that with normal protein, but gains in fat and ham were more. Organ mass increased most with normal protein. With all 3 treatments lysine requirement per kg weight gain reached 17 to 19 and per kg muscle gain 37 to 39 g. For comparable metabolizable energy intake, daily deposition of body DM was not affected by dietary protein or lysine level, whereas deposition of lipid and protein depended on both, but protein deposition in muscle tissue only on lysine. Energy balance is shown.