日粮中添加二甲基甘氨酸钠对肉鸡生产性能、肉品质及抗氧化功能影响的研究

发布时间：2018-07-10 03:29

本文选题：肉鸡 + 二甲基甘氨酸钠　；参考：《南京农业大学》2015年硕士论文

【摘要】：本文研究了日粮中添加二甲基甘氨酸钠对肉鸡生产性能、肉品质及抗氧化功能的影响,并探讨了二甲基甘氨酸钠对改善AA肉鸡生产性能及提高抗氧化功能的机理,确定其在肉鸡生产上的最适添加剂量。本试验采用单因子随机设计,选择体重相近、1日龄的AA肉鸡720只,随机分为6个处理组,每组6个重复,每个重复20只肉鸡,公母各半,试验期分为前期(1-21d)和后期(22-42d),各试验组分别为:CON组为基础日粮组,T1组、T2组、T3组、T4组及T5组分别为在基础日粮中添加300、500、1000、1500及2000 mg/kg的二甲基甘氨酸钠的试验组,试验部分由试验一到试验四组成。试验一,研究了二甲基甘氨酸钠对AA肉鸡生产性能、养分表观消化率及内源消化酶活性的影响。结果表明:(1)添加二甲基甘氨酸钠提高了肉鸡体增重(P0.05),极显著的降低了料肉比(P0.01),且以添加1000 mg/kg二甲基甘氨酸钠组生产性能最好。(2)与对照组相比,日粮中添加1000,1500和2000 mg/kg二甲基甘氨酸钠能显著提高42日龄肉鸡对粗蛋白的表观利用率(P0.05)。(3)添加500 mg/kg和1000 mg/kg二甲基甘氨酸钠可以显著提高胰腺脂肪酶的活性(P0.05),而1000 mg/kg的处理组较对照组有提高胰腺胰蛋白酶活性的趋势,但不显著(P0.05),添加剂量为1500 mg/kg和2000 mg/kg的二甲基甘氨酸钠则能有效提高胰腺组织的胰蛋白酶活性(P0.05)。试验二,研究了二甲基甘氨酸钠对肉鸡器官指数对AA肉鸡器官指数和屠宰性能的影响。结果表明:(1)与对照组相比,肉鸡日粮中添加2000 mg/kg二甲基甘氨酸钠可显著提高肉鸡的脾脏指数(P0.05)。(2)二甲基甘氨酸钠可显著提高肉鸡的全净膛率(P0.05)和腿肌率(P0.05);且以添加1500 mg/kg二甲基甘氨酸钠组效果最好。试验三,研究了二甲基甘氨酸钠对AA肉鸡血液生理生化指标和抗氧化功能的影响。结果表明:(1)与对照组相比,添加剂量为1000 mg/kg二甲基甘氨酸钠组的肉鸡生长前期血液中三碘甲状腺原氨酸(T3)的含量显著提高(P0.05),二甲基甘氨酸钠对肉鸡生长后期血液中的生理生化指标无显著影响(P0.05);(2)二甲基甘氨酸钠对血液和肝脏的总抗氧化功能影响较为显著。肉鸡生长后期,二甲基甘氨酸钠添加剂量在500 mg/kg以上的组血液中T-AOC水平显著提高(P0.05);1000 mg/kg以上的二甲基甘氨酸钠则能显著提高肝脏的T-AOC水平(P0.05)。试验四,研究了二甲基甘氨酸钠对AA肉鸡肉品质及肌肉抗氧化功能的影响。结果表明:(1)二甲基甘氨酸钠主要影响胸肌的肉品质。1000、1500mg/kg二甲基甘氨酸钠较对照组极显著地降低了烹饪损失率(P0.01),2000 mg/kg二甲基甘氨酸钠则显著降低了烹饪损失率(P0.05);1500、2000 mg/kg二甲基甘氨酸钠组的96 h滴水损失率显著低于对照组(P0.05)。就剪切力而言,1000-2000 mg/kg二甲基甘氨酸钠可极显著的降低肉鸡胸肌的剪切力(P0.01)。(2)二甲基甘氨酸钠对胸肌的抗氧化功能影响较为显著。与对照组相比,1000 mg/kg的二甲基甘氨酸钠可显著提高胸肌中总抗氧化能力(P0.05)。综上所述,本试验建议二甲基甘氨酸钠在肉鸡玉米豆粕型配合饲料或全混合日粮中的推荐添加剂量为1000-1500 mg/kg。
[Abstract]:In this paper, the effects of adding two methyl glycine sodium on the production performance, meat quality and antioxidant function of broilers were studied. The mechanism of two methyl glycine sodium to improve the production performance and antioxidant function of AA broilers was discussed, and the optimum dosage in broiler production was determined. A single factor random design was adopted in this experiment. 720 AA broilers of 1 days of age were randomly divided into 6 treatment groups, with 6 repetitions in each group, each repeated 20 broilers and half of the male and female. The test period was divided into early stage (1-21d) and later period (22-42d). The experimental groups were divided into CON group based diet group, T1 group, T2 group, T3 group, T4 group and T5 group added 30050010001500 and 2000 respectively to basal diet, respectively. Mg/kg two methyl glycine sodium test group, the test part from the test to the test four. Test 1, study the effect of two methyl glycine sodium on the production performance, nutrient apparent digestibility and endogenous digestive enzyme activity of AA broilers. The results showed that (1) adding two METHYL GLYCINATE to increase the weight gain of broiler (P0.05), very significant reduction The ratio of meat to meat (P0.01) and the addition of 1000 mg/kg two methyl glycine sodium were the best. (2) the addition of 10001500 and 2000 mg/kg two methyl glycine to the control group could significantly increase the apparent utilization rate of crude protein (P0.05) in 42 day old broilers. (3) adding 500 mg/kg and 1000 mg/kg two methyl glycine sodium could be significantly raised. The activity of high pancreatic lipase (P0.05), while the 1000 mg/kg treatment group had a tendency to increase pancreatic trypsin activity in comparison with the control group, but not significantly (P0.05). The additive amount of 1500 mg/kg and 2000 mg/kg of two methyl glycine could effectively improve the pancreatic protease activity (P0.05) in pancreatic tissue. Test two, the study of two methylglycine sodium was studied. The effect of chicken organ index on the organ index and slaughter performance of AA broilers showed that: (1) compared with the control group, adding 2000 mg/kg two methyl glycine sodium in the broiler diet could significantly increase the spleen index (P0.05) of broilers. (2) two methyl glycine sodium could significantly increase the total net chamber rate (P0.05) and the leg muscle rate (P0.05) of the meat chicken, and add 150 to the meat chicken. The effect of 0 mg/kg two methyl glycine sodium group was the best. Test three, the effect of two methyl glycine sodium on the blood physiological and biochemical indexes and antioxidant function of AA broilers was studied. The results showed: (1) the content of three iodine thyroid prolysine (T3) in the prophase blood of broilers was compared with the control group. Significantly improved (P0.05), two methylglycine sodium had no significant effect on the physiological and biochemical indexes in the blood of broilers (P0.05). (2) the effect of two methyl glycine sodium on the total antioxidant function of the blood and liver was significant. The level of T-AOC in the blood of the group with the dosage of two methyl glycine sodium added over 500 mg/kg was significant in the late growth stage of broiler chickens. Increase (P0.05); 1000 mg/kg of two methyl glycine sodium could significantly increase the liver T-AOC level (P0.05). Test four, study the effect of two methyl glycine sodium on meat quality and muscle antioxidant function of AA broilers. The results showed that (1) two methyl glycine sodium mainly affected the meat quality of breast muscle.10001500mg/kg two methyl glycine sodium. The cooking loss rate (P0.01) was significantly lower than that in the control group. The cooking loss rate (P0.05) was significantly reduced by 2000 mg/kg two methyl glycine sodium, and the 96 h drop rate of 15002000 mg/kg two methyl glycine sodium group was significantly lower than that of the control group (P0.05). In terms of shear force, 1000-2000 mg/kg two methyl glycine sodium could significantly reduce meat. The shear strength of the breast muscle (P0.01). (2) two methyl glycine sodium has a significant effect on the antioxidant function of the chest muscle. Compared with the control group, the total antioxidant capacity of the two methyl glycine sodium (1000 mg/kg) can be significantly increased in the chest muscle (P0.05). To sum up, this experiment suggested that two methyl glycine sodium in the broiler corn soybean meal combined feed or full mixing. The recommended amount of additives in the diet is 1000-1500 mg/kg.
【学位授予单位】：南京农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S831.5

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