By Michael Edmonds, Ph.D., Vice President, Swine and Poultry Nutrition
Many research trials have been conducted over the years at the Kent Nutrition Group Product Development Center in which performance, carcass, and economics were all improved with supplemental Paylean. This article contains additional research conducted in 2013 in which Paylean was fed during the last 28 days of finishing via a “step-up” program at 4.5 grams per ton (Days 0-14) followed by 9.0 grams per ton (Days 14-28).
There were 558 terminal-cross finishing pigs involving 79 pens for each treatment. With an average starting weight of 214 pounds, the pigs were randomly allotted on the basis of weight and sex. The pigs were fed diets formulated with vitamin and trace minerals (VTM’s), limestone, monocalcium phosphate, salt, distillers dried grains, soybean meal, corn and synthetic amino acids with the average cost of around $240/ton. The Paylean cost was approximately $36.75 per pound for Paylean 9. On average, the diets contained 17.2% crude protein and 1.02% lysine. The results are shown in Table 1 below:
Late finishing pigs fed Paylean had significant improvements in gain (13.9%) and feed efficiency (-12.8%) as well as a lower cost of gain due to the marked improvement in feed efficiency. The pigs on Paylean also weighed 7.8 pounds heavier at market and had a significant improvement in dressing percent, which further increased the carcass weight advantage to 8.2 pounds. Using a meat price of 86₵ per pound for the carcass weights shown, resulted in an advantage in carcass value of $7.05 per pig with Paylean. Furthermore, we observed a marked improvement in grade premiums with Paylean, which added more value. In contrast, the added cost per head was $2.10 more per pig with Paylean. Subtracting total carcass value from the cost of gain per head resulted in a final net return advantage of $6.87 per head for those pigs fed Paylean.
Three of 558 pigs died on the Control diets, and one pig died of 558 pigs on the treatment with Paylean. There were also two lame pigs out of 558 pigs on the Paylean treatment. So with the genetics used and proper pig handling, we did not experience any significant problems with the use of Paylean and in return made $6.87 more per pig by feeding diets with Paylean via a “step-up” program.