Effects of a saccharomyces yeast postbiotic on growth performance and carcass traits of pigs fed diets with divergent protein content

作者：Li X, Alambarrio DA, Zedonek SS, Vaughn MA, Paulk CB, Gonzalez JM · 发表于：Translational animal science · 年份：2026 · DOI：10.1093/tas/txag013 · 被引用次数：32 · 研究领域：Saccharomyces yeast postbiotic、elevated-protein、feed performance、porcine、yield

The objective of this study was to determine effects of a Saccharomyces yeast postbiotic (SYP) on pig growth performance and carcass traits when added to diets containing elevated- and commercial-protein contents during growing and finishing phases. Pigs (N = 51 barrows and 57 gilts; initial BW 28.3 ± 3.5 kg) were weighed, stratified by weight within sex, and within each 18-pig strata pigs were randomly assigned to a pen (N = 18; N = 6 pigs/pen). Pens were randomly assigned to one of two dietary treatments (TRT) consisting of 0- (SYP-) or 100-ppm SYP (SYP+) mixed in a four-phase dietary regimen (phase 1, d 0 to 21; phase 2, d 22 to 42; phase 3, d 43 to 63; phase 4, d 64 to 84). Feed consumption and body weight (BW) were collected weekly to calculate average daily gain (ADG) and average daily feed intake (ADFI). Pigs were harvested over three harvest blocks where the heaviest male and female from each pen were harvested and carcass data were collected 24-h postmortem. During all four phases, there were no TRT effects on BW, ADG, and ADFI (P > 0.12), except SYP + pigs had less (P = 0.04) phase-4 ADFI. There was no TRT effect (P = 0.86) on phase-2 G: F, but SYP + pigs had greater phase-1 and -4 G: F and smaller phase-3 G: F (P < 0.04). Carcasses from SYP + pigs tended to have greater (P = 0.09) HCW and had greater (P < 0.01) dressing percent than SYP- carcasses. There were no TRT treatment effects for 10th or last rib fat thickness (P > 0.13), but SYP + carcasses tended to have ...