The aim of the experiment was to study the effects of feeding blends of sorbic acid, fumaric acid, and thymol(EOA) on growth performance, digestive functions, and immunity of broiler chickens. A total of 640 one-day-o...The aim of the experiment was to study the effects of feeding blends of sorbic acid, fumaric acid, and thymol(EOA) on growth performance, digestive functions, and immunity of broiler chickens. A total of 640 one-day-old male Cobb 500 chicks with similar BW(41.8 ± 0.6 g) were randomly divided into 4dietary treatment groups consisting of 10 replicates with 16 birds per replicate and fed a basal diet until d 42(CON) or diets with 0.15 g/kg enramycin during the grower period(AG), 0.30 g/kg EOA during the grower period(EG), or 0.30 g/kg EOA during the finisher period(EF). At d 42, the feed conversion ratio was reduced(P < 0.05) for birds in EG group compared with other groups. Birds in EG group showed a higher villus height of the duodenum and jejunum and muscular layers of the duodenum and ileum than birds in CON group(P < 0.05). Compared with other groups, crypt depth of the jejunum and ileum was markedly increased(P < 0.05) by EOA supplementation during the finisher period at d 42. The EOA supplementation during grower period increased significantly lipase, trypsin and chymotrypsin activities of the duodenum at d 21 and 42, as well as lipase and trypsin at d 21, and trypsin and chymotrypsin at d 42 in the jejunum, and trypsin and chymotrypsin activities of the ileum at d 21 compared to the control diet(P < 0.05). Birds of EG and EF groups showed a higher(P < 0.05) spleen index than birds of CON group. The level of secretory immunoglobulin A in duodenal and ileal mucosa was increased(P < 0.05) in EF group at d 42 compared with other groups. In conclusion, the results indicate that EOA can be effectively applied in broiler diets, especially during the grower phase by improving intestinal morphology and increasing digestive enzyme activity.展开更多
本试验旨在研究饲粮中添加中药复合小肽(compound small peptide of Chinese medicine,CSPCM)对肉鸡抗氧化功能、消化酶活力、肉品质和表观代谢率的影响。试验选用400只1日龄雄性爱拔益加肉仔鸡,随机分为4组,空白对照组(基础饲粮)、CSPC...本试验旨在研究饲粮中添加中药复合小肽(compound small peptide of Chinese medicine,CSPCM)对肉鸡抗氧化功能、消化酶活力、肉品质和表观代谢率的影响。试验选用400只1日龄雄性爱拔益加肉仔鸡,随机分为4组,空白对照组(基础饲粮)、CSPCM组(饲料中添加250,500,750 g/t CSPCM),每组100只。饲养在三层笼网中(110 cm×60 cm×50 cm,每笼5只),在整个42 d试验中可自由取食和饮水。分别于21和42 d测定肝脏氧化指标。在42 d测定消化酶活力、肉品质和表观代谢率。结果显示,饲料中添加CSPCM可改善肝脏抗氧化酶活力,消除体内的脂质过氧化产物。饲料中添加500 g/t CSPCM改善机体抗氧化能力和胃蛋白酶活力效果最好,但也加速鸡胸肉变酸的速度。鸡胸肉的系水力与CSPCM在饲料中添加量成反比。饲粮中添加500 g/t CSPCM提高了粗蛋白、粗脂肪、钙和磷的表观代谢率,从而增加了肉鸡营养物质的沉积。结果表明,饲粮中添加CSPCM可提高肉鸡的表观代谢率、消化酶活力和抗氧化能力。而CSPCM的添加会降低鸡胸肉的系水力。CSPCM可以作为肉鸡饲料添加剂来提高肉鸡体内营养物质消化沉积和抗氧化能力,添加量以500 g/t最佳。展开更多
基金supported by the National Natural Science Foundation of China under Grant(31402095,to X Yang)Program for Shaanxi Science and Technology of China under Grant(2017ZDXM-NY-087,to X Yang)Fundamental Research Funds for the Central Universities of China under Grant(2452015030,to X Yang)
文摘The aim of the experiment was to study the effects of feeding blends of sorbic acid, fumaric acid, and thymol(EOA) on growth performance, digestive functions, and immunity of broiler chickens. A total of 640 one-day-old male Cobb 500 chicks with similar BW(41.8 ± 0.6 g) were randomly divided into 4dietary treatment groups consisting of 10 replicates with 16 birds per replicate and fed a basal diet until d 42(CON) or diets with 0.15 g/kg enramycin during the grower period(AG), 0.30 g/kg EOA during the grower period(EG), or 0.30 g/kg EOA during the finisher period(EF). At d 42, the feed conversion ratio was reduced(P < 0.05) for birds in EG group compared with other groups. Birds in EG group showed a higher villus height of the duodenum and jejunum and muscular layers of the duodenum and ileum than birds in CON group(P < 0.05). Compared with other groups, crypt depth of the jejunum and ileum was markedly increased(P < 0.05) by EOA supplementation during the finisher period at d 42. The EOA supplementation during grower period increased significantly lipase, trypsin and chymotrypsin activities of the duodenum at d 21 and 42, as well as lipase and trypsin at d 21, and trypsin and chymotrypsin at d 42 in the jejunum, and trypsin and chymotrypsin activities of the ileum at d 21 compared to the control diet(P < 0.05). Birds of EG and EF groups showed a higher(P < 0.05) spleen index than birds of CON group. The level of secretory immunoglobulin A in duodenal and ileal mucosa was increased(P < 0.05) in EF group at d 42 compared with other groups. In conclusion, the results indicate that EOA can be effectively applied in broiler diets, especially during the grower phase by improving intestinal morphology and increasing digestive enzyme activity.
