Expected pig performance has been increased with improvements in lean growth potential and health status so reevaluation on amino acid requirements is needed. Specifically on the lysine requirement and the ratio of DE to lysine for weaned pigs. Current ratios vary from 2.8 to 5.0 g total lysine/Mcal DE. For pigs growing from 7.5 to 22 kg, the optimum ratio from this experiment is 4.65 g total lysine/Mcal DE. Average daily gain was unaffected by DE levels. Feed efficiency was slightly improved when increasing DE and therefore lowering feed intake. Diet economics for weanling pigs change depending on market price and ingredient costs.
The Effect of Dietary Energy Concentration and Lysine – Energy Ratio on the Growth Performance of Weaned Pigs (full article)
