本试验旨在探究饲粮中添加茶多酚对0～18周龄狮头鹅生长性能、屠宰性能、肌肉品质及抗氧化能力的影响.试验采用单因素完全随机试验设计,选取1日龄体重相近的健康雄性狮头鹅360只,随机分为3组,每组6个重复,每个重复20只鹅.对照组饲喂基础饲粮,试验Ⅰ和Ⅱ组分别在基础饲粮中添加500和1 000 mg/kg茶多酚,试验期18周.结果表明:1)与对照组相比,各试验组13～18周龄料重比均显著降低(P＜0.05).2)与对照组相比,各试验组腹脂率均显著降低(P＜0.05).3)与对照组相比,各试验组胸肌24 h红度(a*)值、腿肌45 min a*值均显著提高(P＜0.05),胸肌剪切力显著降低(P＜0.05);试验Ⅱ组腿肌pH45min和pH24h显著提高(P＜0.05),腿肌24 h亮度(L*)值和胸肌滴水损失显著降低(P＜0.05).4)与对照组相比,各试验组胸肌和腿肌粗灰分含量均显著降低(P＜0.05),试验Ⅱ组胸肌水分含量显著降低(P＜0.05)o 5)与对照组相比,各试验组胸肌和腿肌中总超氧化物歧化酶(T-SOD)活性均显著提高(P＜0.05),腿肌谷胱甘肽过氧化酶(GSH-Px)活性显著提高(P＜0.05),胸肌丙二醛(MDA)含量显著降低(P＜0.05);试验Ⅰ组胸肌总抗氧化能力(T-AOC)显著提高(P＜0.05),试验Ⅱ组腿肌T-AOC显著提高(P＜0.05).综上所述,饲粮中添加茶多酚可提高狮头鹅饲料报酬,改善肉品质,降低腹脂率,并提高肌肉抗氧化能力.在本试验条件下,在0～18周龄狮头鹅饲粮中添加1 000 mg/kg茶多酚的应用效果相对较优.
Effects of Tea Polyphenols on Growth Performance,Slaughtering Performance and Muscle Quality of Lion-Head Goose at 0 to 18 Weeks of Age
The experiment was to investigate the effects of dietary tea polyphenols supplementation on growth performance,slaughter performance,muscle quality and antioxidant capacity of lion-head goose at 0 to 18 weeks of age.A total of 360 male lion-headed goose with body weight and genetic background at 1 day of age were randomly divided into 3 groups with 6 replicates per group and 20 lion-headed goose per replicate.The control group was fed a basal diet,and the experimental groups Ⅰ and Ⅱ were fed the basal diet supplemented with 500 and 1 000 mg/kg tea polyphenols respectively for 18 weeks.The results showed as follows:1)com-pared with the control group,feed to gain ratio in all experimental groups significantly reduced at 13 to 18 weeks of age(P＜0.05).2)Compared with the control group,the abdominal fat rate in all experimental groups significantly reduced(P＜0.05).3)Compared with the control group,the 24 h redness(a*)value of chest muscle,and 45 min a* value of leg muscle in all the experimental groups significantly increased(P＜0.05)and the shear force of chest muscle significantly decreased(P＜0.05),while the pH45min and pH24h of leg muscle in the experimental group Ⅱ significantly increased(P＜0.05)and the 24 h lightness(L*)value of leg muscle and drip loss of chest muscle significantly decreased(P＜0.05).4)Compared with the control group,the crude ash content in chest muscle and leg muscle in all experimental groups significantly decreased(P＜0.05)and the moisture content in the chest muscle significantly decreased in the experimental group Ⅱ(P＜0.05).5)Compared with the control group,the activity of total superoxide dismutase(T-SOD)in chest muscle and leg muscle in all experimental groups significantly increased(P＜0.05)and activity of glutathione peroxidase(GSH-Px)in leg muscle significantly increased(P＜0.05),and malondialdehyde(MDA)content in chest muscle significantly decreased(P＜0.05);total antioxidant capacity(T-AOC)in chest muscle in ex-perimental group Ⅰ significantly increased(P＜0.05),T-AOC in leg muscle in experimental group Ⅱ signifi-cantly increased(P＜0.05).In conclusion,dietary addition of tea polyphenols increases feed conversion,im-proves meat quality,reduces abdominal fat rate,and improves muscle antioxidant capacity in lion-head goose.In addition,under the experimental conditions,the application effect of dietary supplemented with 1 000 mg/kg tea polyphenols is relatively better in lion-hean goose at 0 to 18 weeks of age.[Chinese Journal of Animal Nutrition,2024,36(4):2383-2394]
万方数据
维普
