Effect of Dietary Lysine Levels on 21-Day Lactation Performance of First-Litter Sows

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Abstract
One-hundred three first-litter sows and their litters were used to assess the lysine requirement of the lactating dam during the first 21 days of lactation. The diet fed during lactation was a 16% protein corn-soybean-sesame meal diet (0.60% lysine) supplemented, with one of five levels of L-lysine·HCl (0, 0.125, 0.250, 0.375 and 0.500%). There were no significant differences in any of the performance criteria studied (number of pigs weaned, pig weight and gain to 21 days and first-litter sow lactation weight loss and feed intake). Hence, it would appear that the lysine need of lactating first-litter sows does not exceed 0.60% of the diet or 20 g per day.

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