Protein Sparing Effect Of A Fermenation Product In Pig Diets From Weaning To Market
Kansas State University Swine Reserach 1990. One hundred eighty pigs (avg wt of 21.1 lb) were used in an experiment to determine if a fermentation product1 improves performance and reduces last rib fat thickness in pigs when added to a low-protein diet regimen. Treatments were: 1) positive control (19-16-14% crude protein regimen during the nursery-growing-finishing phases); 2) positive control plus 2.50 lb/ton fermentation product; 3) low-protein regimen (17-14-12% crude protein during the nurserygrowing- finishing phases); 4) low-protein regimen plus 1.25 lb/ton fermentation product; 5) lowprotein regimen plus 2.50 lb/ton fermentation product; and 6) low-protein regimen plus 5.00 lb/ton fermentation product. As addition of fermentation product was increased from 0 to 5.00lb/ton in the low-protein regimen, average daily feed intake (ADFI) of nursery pigs decreased linearly. However, average daily gain (ADG) and feed to gain ratio (F/G) tended to be best for pigs fed 1.25 lb/ton of fermentation product compared to other treatments. During the growing and finishing phases, feeding the low-protein regimen reduced performance compared to the positive control. Compared to pigs fed the positive control, feeding 2.50 lb/ton of fermentation product tended to decrease ADFI and ADG but improved F/G. Feeding 2.50 and 5.00 lb/ton fermentation product reduced ADG and ADFI, and worsened F/G for pigs fed the low-protein regimen. Overall (from 21 to 220 lb), feeding the fermentation product at more than 1.25 lb/ton in the low-protein diet regimen tended to reduce performance, and pigs fed the low protein diets with or without the fermentation product had poorer performance (ADG, ADFI, F/G, and last rib fat thickness) than pigs fed the 19-16-14% crude protein diets.