| 饲粮中添加甜菜碱对热应激蛋鸡生产性能、蛋品质及血清生化指标的影响 |
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| 引用本文： | 郝生燕,刘陇生,王国栋,顾娴,潘发明.饲粮中添加甜菜碱对热应激蛋鸡生产性能、蛋品质及血清生化指标的影响[J].动物营养学报,2017,29(1). |
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| 作者姓名： | 郝生燕 刘陇生 王国栋 顾娴 潘发明 |
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| 作者单位： | 甘肃省农业科学院畜草与绿色农业研究所,兰州,730070 |
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| 基金项目： | 甘肃省农业科学院中青年基金项目(2014GAAS33)；甘肃省农业科学院农业科技创新专项 |
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| 摘 要： | 本试验旨在研究饲粮中添加甜菜碱对热应激蛋鸡生产性能、蛋品质及血清生化指标的影响。选用健康的22周龄商品代罗曼褐蛋鸡600只,随机分成5组,每组8个重复,每个重复15只鸡。Ⅰ组为正对照组,饲喂基础饲粮,正常温热环境,温湿指数(THI)介于64.9~68.9;Ⅱ组为负对照组,饲喂基础饲粮,热应激环境,THI72;Ⅲ~Ⅴ组分别在基础饲粮中添加200、400和600 mg/kg甜菜碱,均为热应激环境,THI72。试验期为14周。结果表明,各组间平均日采食量、料蛋比和破蛋率差异不显著(P0.05)。与Ⅰ组相比,Ⅱ组显著降低了入舍母鸡产蛋率、入舍母鸡产蛋重及血清总蛋白(TP)含量、碱性磷酸酶(AKP)活性(P0.05),显著提高了血清中谷草转氨酶(GOT)、肌酸激酶(CK)和谷丙转氨酶(GPT)活性(P0.05)。与Ⅱ组相比,Ⅳ组入舍母鸡产蛋率、入舍母鸡产蛋量和血清TP含量均显著提高(P0.05),Ⅴ组入舍母鸡产蛋量及血清TP、白蛋白(ALB)含量也显著提高(P0.05),而Ⅳ组和Ⅴ组的血清CK、GPT活性却显著降低(P0.05),且Ⅴ组的血清甘油三酯(TG)含量也显著降低(P0.05)。综上所述,热应激可使产蛋鸡的新陈代谢和生理机能发生变化,导致生产性能下降,而饲粮中添加甜菜碱可以提高入舍母鸡产蛋率和入舍母鸡产蛋重,并改善热应激对蛋鸡的损伤,饲粮中甜菜碱的适宜添加量为400 mg/kg。
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| 关 键 词： | 甜菜碱 热应激 蛋鸡 生产性能 蛋品质 血清生化指标 |
Effects of Dietary Betaine on Performance,Egg Quality and Serum Biochemical Parameters of Laying Hens under Heat Stress Condition |
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| HAO Shengyan,LIU Longsheng,WANG Guodong,GU Xian,PAN Faming.Effects of Dietary Betaine on Performance,Egg Quality and Serum Biochemical Parameters of Laying Hens under Heat Stress Condition[J].Acta Zoonutrimenta Sinica,2017,29(1). |
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| Authors: | HAO Shengyan LIU Longsheng WANG Guodong GU Xian PAN Faming |
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| Abstract: | This experiment was conducted to study the effects of dietary betaine on performance, egg quality and serum biochemical parameters of laying hens under heat stress condition. Six hundred 22?week?old com?mercial Roman laying hens were randomly divided into 5 groups with 8 replicates per group and 15 hens per replicate. The temperature humidity index ( THI) of group Ⅰ ( positive control group) was between 64. 9 to 68.9, which was fed a basal diet in normal thermal environment; the THI of group Ⅱ ( negative control group) was greater than 72, which was fed a basal diet under heat stress condition;while groupsⅢtoⅤwere fed the basal diets supplemented with 200, 400 and 600 mg/kg betaine under heat stress condition, respective?ly, the THI of them were greater than 72 as well. The experiment lasted for 14 weeks. The results showed that there were no significant differences in average daily feed intake, feed/egg and broken egg rate among all groups ( P>0.05) . Compared with the groupⅠ, the hen?housed laying rate, hen?housed egg yield, serum to?tal protein ( TP) content and serum alkaline phosphatase ( AKP) activity of group Ⅱ were significantly de?creased ( P<0.05) , but the activities of glutamic?oxalacetic transaminase ( GOT) , creatine kinase ( CK) and glutamic?pyruvic transaminase ( GPT) of groupⅡ were significantly increased ( P<0.05) . Compared with the group Ⅱ, the hen?housed egg production, hen?housed egg yield and serum TP content of groupⅣwere signif?icantly increased ( P<0.05) , the hen?housed egg yield and the contents of TP and albumin ( ALB) in serum of group Ⅴ were significantly increased ( P<0.05) , the activities of CK and GPT in serum of groups Ⅳ and Ⅴwere significantly decreased (P<0.05), the serum triglyceride (TG) content of group Ⅴ were significantly decreased ( P<0.05) . In conclusion, the metabolism and physiological function of layer are affected by heat stress, and which resulting in a decline in performance, but dietary betaine can improve the hen?housed egg production and hen?housed laying rate, and to improve the health of layer under heat stress. The dietary appro?priate betaine level is 400 mg/kg. |
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| Keywords: | betaine heat stress laying hens performance egg quality serum biochemical parameters |
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