动物营养学报2026，Vol.38Issue(3)：1727-1739,13.DOI:10.12418/CJAN2026.140
饲粮赖氨酸水平对荣昌商品猪生长性能、血清生化和抗氧化指标及粪便菌群的影响
Effects of Dietary Lysine Level on Growth Performance,Serum Biochemical and Antioxidant Indices,and Fecal Microbiota of Commercial Rongchang Pigs
摘要
Abstract
This experiment was conducted to explore the effects of dietary lysine level on the growth perform-ance,serum biochemical and antioxidant indices,and fecal microbiota of commercial Rongchang pigs.A total of 75"Rongchang×Landrace×Yorkshire"hybrid pigs with good health and similar body weight of(14.81±0.03)kg were selected and randomly divided into 5 groups,with 5 replicates in each group and 3 pigs in each replicate.The experiment was divided into two phases,and five dietary standardized ileal digestible lysine(SID Lys)levels were set in each phase.Among them,the dietary SID Lys levels in the 15 to 30 kg phase were 0.83%,0.91%,0.99%,1.07%and 1.15%,and in the 30 to 60 kg phase were 0.51%,0.57%,0.63%,0.69%and 0.75%,respectively.The experiment lasted for 63 days.The results showed as follows:1)in the 15 to 30 kg phase,the feed to gain ratio in 0.99%SID Lys group was the lowest,which was signifi-cantly lower than that in 0.83%and 1.07%SID Lys groups(P＜0.05);in the 30 to 60 kg phase,the average daily weight gain in 0.63%SID Lys group was the highest,which was significantly higher than that in 0.75%SID Lys group(P＜0.05).2)At 30 kg,the serum alkaline phosphatase activity in 0.91%SID Lys group was significantly higher than that in 0.83%and 1.07%SID Lys groups(P＜0.05);at 60 kg,the serum alanine aminotransferase activity and urea nitrogen content in 0.75%SID Lys group were significantly higher than those in 0.57%,0.63%and 0.69%SID Lys groups(P＜0.05).3)The dietary SID Lys level had no significant effect on the serum antioxidant indices(P＞0.05).4)The dietary SID Lys level had no significant effect on the α diversity of fecal microbiota(P＞0.05);the results of principal coordinate analysis(PCoA)indicated that there were significant differences in the β diversity of fecal microbiota among the groups(P＜0.05).At 30 kg,compared with 1.15%SID Lys group,the fecal Firmicutes relative abundance in 0.83%and 0.99%SID Lys groups was significantly increased(P＜0.05),while the fecal Bacteroidota relative abundance was significantly decreased(P＜0.05);the fecal Prevotellaceae_NK3B31_group relative abundance in 1.15%SID Lys group was significantly higher than that in the other groups(P＜0.05).At 60 kg,there was no significant difference in the relative abundances of the main phyla and genera of fecal microbiota among the groups(P＞0.05).To sum up,the dietary SID Lys level can change the fecal microbiota of commercial Rongchang pigs.Based on the evaluation index of growth performance,the appropriate dietary SID Lys level for commercial Rongchang pigs in the 15 to 30 kg phase is 0.99%,and that in the 30 to 60 kg phase is 0.63%.[Chinese Jour-nal of Animal Nutrition,2026,38(3):1727-1739]关键词
赖氨酸/荣昌猪/生长性能/血清指标/粪便菌群Key words
lysine/Rongchang pigs/growth performance/serum indices/fecal microbiota分类
农业科技引用本文复制引用
朱启东,齐仁立,罗敏,王敬,龙定彪,王琪..饲粮赖氨酸水平对荣昌商品猪生长性能、血清生化和抗氧化指标及粪便菌群的影响[J].动物营养学报,2026,38(3):1727-1739,13.基金项目
国家生猪技术创新中心先导科技项目(NCTIP-XD/B04) （NCTIP-XD/B04）
重庆市现代化农业产业技术体系(CQMAITS202312) （CQMAITS202312）
