0
In the first experiment, sow ADFI averaged 7 kg per day. Sow body weight gain was significantly reduced (20.8, 15.7, 17.8, 17.5, 10.4 kg, P ≤.04) as lysine intake increased. However, subsequent performance and average daily pig gain were not significantly different (P ≥.1). In the second experiment, total lysine intake was 35.2, 40.2, 45.1, 50.2, and 56.7 g of lysine per day, respectively. Sow weight gain was not affected by lysine intake. Piglet litter gain was linearly improved (2.18, 2.19, 2.25, 2.35, and 2.43 kg, P ≤.03) with the feeding of additional lysine. In addition, piglet average daily gain was linearly improved as g of lysine increased (.228, .246, .239, .244, and .254, P ≤.03).
In conclusion, the feeding of a minimum of 50 g of lysine per day for older parity sows can improve piglet performance. In addition, formulating a sow diet based on percent lysine is only effective when total feed intake is known. Since total feed intake can vary within a herd, it is better to formulate the sow's requirements based on grams of lysine per day.
L Greiner, J Soto, J Connor, G Allee, J Usry, and N Williams, 2010. Journal of Animal Science, 87 (E-Suppl. 3):55.
