肥猪饲养管理.ppt

J. NOBLET - INRA - American Soybean Association - 09/2001 Nutrition of the growing pig: adaptation of diet characteristics to animal and environment conditions Jean NOBLET Institut National de la Recherche Agronomique 35590 Saint Gilles (France) Estimation of digestible lysine requirement (LysD) in growing pigs Estimation of digestible lysine requirement (LysD) in growing pigs = Increase of energy requirement Exposure to cold climatic conditions Reduction of diet lysine content = Effect of energy restriction Exposure to hot climatic conditions No important change in diet lysine content ? Effect of health status Health status Poor Good DE intake, MJ/d 12.45 14.21 ADG, g 507 654 Protein gain, g/d 80 106 Lipid gain, g/d 70 83 LysD requirement g/d 9.0 11.8 % of diet 1.00 1.15 Effect of health status on performance and lysine requirement (6-27 kg) From Williams et al., 1997 Health status Poor Good DE intake, MJ/d 27.8 31.3 ADG, g 688 854 Protein gain, g/d 88 117 Lipid gain, g/d 211 241 LysD requirement g/d 10.3 13.5 % of diet 0.51 0.60 Effect of health status on performance and lysine requirement (6-112 kg) From Williams et al., 1997 = Increase of protein deposition Improvement of healthstatus Increase of diet lysine content More important for improved genotypes ? Response of growing pigs to diet energy concentration Effect of energy concentration on DE intake Relative DE intake, % Effect of energy concentration on BW gain Relative carcass yield, % Effect of energy concentration on carcass yield No change in feed energy: BW gain ratio Reduced feed: BW gain ratio Increased carcass fatness Increase of diet energy concentration ? Feed intake in growing pigs Gain, g/d From Quiniou et al., 1996 Barrows; 45 to 100 kg BW Effect of ME intake on protein gain Practical range Feed (energy) intake in growing pigs is depressed by: Meal feeding, palatability, energy density, ... High ambient temperature Poor health / management Genetic im