红曲米酒糟对贵州黄鸡产蛋性能、孵化性能、养分消化利用及血液生化指标的影响OA

This study aimed to investigate the effects of partially replacing soybean meal with red yeast rice dis-tillers'grains on the laying performance,hatching performance,nutrient digestion and utilization,and blood biochemical indices of Guizhou yellow chickens,and to evaluate the nutritional value and safety of red yeast rice distillers'grains.A total of 576 healthy Guizhou yellow chickens aged 29 weeks with similar body weight were selected and randomly divided into 4 groups,with 4 replicates per group and 36 chickens per replicate(34 hens+2 roosters).Chickens in the CON,D5,D10 and D15 groups were fed experimental diets containing 0(control),5%,10%,and 15%red yeast rice distillers'grains as a partial substitute for soybean meal,re-spectively.The experiment included a 1-week adaptation period followed by an 8-week formal trial period.The results showed as follows:1)the supplemental level of red yeast rice distillers'grains had no significant effects on the laying rate,average daily feed intake and feed-to-egg ratio of Guizhou yellow chickens(P＞0.05),but showed an increasing trend in average egg weight(P=0.006).2)Compared with the CON group,dietary supplementation with 5%to 15%red yeast rice distillers'grains significantly increased the fer-tility rate and hatchability of Guizhou yellow chickens(P＜0.05).3)Compared with the CON group,dietary supplementation with 5%to 15%red yeast rice distillers'grains significantly improved the yolk ratio of Guizhou yellow chickens at both the 4th and 8th weeks of the trial(P＜0.05);when the red yeast rice distill-ers'grains supplemental level reached 15%,it significantly enhanced yolk color at the 4th week(P＜0.05).In addition,dietary supplementation with 5%red yeast rice distillers'grains significantly increased eggshell strength at the 4th and 8th week(P＜0.05).4)The activities of glutathione peroxidase and superoxide dis-mutase in the serum of Guizhou yellow chickens showed an extremely significant linear increase with the in-crease of red yeast rice distillers'grains supplemental level(P＜0.01),while the content of malondialdehyde in plasma showed an extremely significant linear decrease(P＜0.01).Similarly,the contents of immunoglobu-lin Y and immunoglobulin A in serum also exhibited an extremely significant linear decline with the increase of red yeast rice distillers'grains supplemental level(P＜0.01).The contents of interleukin-1β,tumor necrosis factor-α and interleukin-6 in serum followed an extremely significant quadratic curve(P＜0.01),initially de-creasing and then increasing as the red yeast rice distillers'grains supplemental level increasing.With the in-crease of red yeast rice distillers'grains supplemental level,the content of uric acid in plasma displayed an ex-tremely significant quadratic trend(P＜0.01),first decreasing and then increasing,whereas the content of tri-glycerides in plasma showed an extremely significant linear decrease(P＜0.01).Furthermore,compared with the CON group,dietary supplementation with 5%to 10%red yeast rice distillers'grains significantly increased the activity of aspartate aminotransferase in serum(P＜0.05).5)The apparent metabolizabilities of dry matter,gross energy,crude protein and calcium in the diets by Guizhou yellow chickens showed an extremely signifi-cant linear increase with the increase of red yeast rice distillers'grains supplemental level(P＜0.01).The ap-parent metabolizabilities of dry matter,gross energy,crude protein,ether extract,calcium and phosphorus in red yeast rice distillers'grains for Guizhou yellow chickens were 83.22%,88.26%,59.81%,88.24%,41.69%and 45.44%,respectively.In conclusion,dietary supplementation with 5%to 10%red yeast rice dis-tillers'grains as a partial replacement for soybean meal can improve nutrient digestion and utilization,enhance antioxidant capacity,increase hatchability and egg quality,and alleviate inflammatory responses in Guizhou yellow chickens.However,it may also cause certain adverse effects on the liver function and humoral immuni-ty.[Chinese Journal of Animal Nutrition,2026,38(3):1851-1861]