1 材料与方法
1.1 试验材料
1.2 试验设计及饲粮
表1 基础饲粮组成及营养水平(风干基础)Table 1 Composition and nutrient levels of basal diets (air-dry basis)% |
| 项目 Items | 1~21日龄 1 to 21 days of age | 22~42日龄 22 to 42 days of age | |||
|---|---|---|---|---|---|
| 原料Ingredients | |||||
| 玉米Corn | 50.85 | 55.84 | |||
| 豆粕Soybean meal (46%) | 36.38 | 30.86 | |||
| 玉米蛋白粉 Corn protein meal (60%) | 3.80 | 3.30 | |||
| 氯化钠NaCl | 0.28 | 0.28 | |||
| 石粉Limestone (37%) | 1.75 | 1.62 | |||
| 磷酸氢钙Ⅲ型CaHPO4 type Ⅲ | 1.55 | 1.40 | |||
| 大豆油Soybean oil | 3.60 | 5.00 | |||
| 维生素预混料Vitamin premix1) | 0.05 | 0.05 | |||
| 微量元素预混料 Trace element premix1) | 0.20 | 0.20 | |||
| 胆碱Choline (50%) | 0.10 | 0.10 | |||
| 固体蛋氨酸Solid Met (99%) | 0.35 | 0.35 | |||
| 赖氨酸Lys (70%) | 0.80 | 0.75 | |||
| 苏氨酸Thr (98.5%) | 0.29 | 0.25 | |||
| 合计Total | 100.00 | 100.00 | |||
| 营养水平Nutrient levels2) | |||||
| 代谢能ME/(MJ/kg) | 12.47 | 12.97 | |||
| 粗蛋白质CP | 23.50 | 21.00 | |||
| 项目 Items | 1~21日龄 1 to 21 days of age | 22~42日龄 22 to 42 days of age | |||
| 钙Ca | 1.00 | 0.90 | |||
| 有效磷AP | 0.50 | 0.48 | |||
| 蛋氨酸+半胱氨酸Met+Cys | 1.02 | 0.96 | |||
| 苏氨酸Thr | 0.95 | 0.90 | |||
| 色氨酸Try | 0.24 | 0.20 |
1)预混料为每千克饲粮提供 The premix provided the following per kg of diets:VA 12 000 IU,VD3 5 000 IU,VE 80 IU,VK3 3.2 mg,VB1 3.2 mg,VB2 8.6 mg,VB6 4.3 mg,VB12 0.017 mg,烟酸 nicotinic acid 65 mg,泛酸 pantothenic acid 20 mg,生物素 biotin 0.22 mg,叶酸 folic acid 2.2 mg,I 1.25 mg,Fe 20 mg,Mn 120 mg,Se 0.3 mg,Zn 110 mg。 2)营养水平为计算值。Nutrient levels were calculated values. |
1.3 饲养管理
1.4 测定指标及方法
1.4.1 生长性能
1.4.2 屠宰性能
1.4.3 肝脏脂肪指标
1.4.4 血清生化指标
1.4.5 回肠末端食糜养分表观消化率
1.5 数据统计与分析
2 结果与分析
2.1 饲粮添加胆汁酸对白羽肉鸡生长性能的影响
表2 饲粮添加胆汁酸对白羽肉鸡生长性能的影响Table 2 Effects of dietary bile acid on growth performance of white feather broilers |
| 项目 Items | 对照组 Control group | 试验组 Experimental group | P值 P-value |
|---|---|---|---|
| 末重FBW/g | 2 474.58±37.68 | 2 506.71±72.08 | 0.687 |
| 平均日采食量ADFI/(g/d) | 93.37±1.11 | 95.67±1.98 | 0.341 |
| 平均日增重ADG/(g/d) | 57.84±0.90 | 59.80±1.58 | 0.278 |
| 料重比F/G | 1.62±0.01 | 1.59±0.01 | 0.011 |
2.2 饲粮添加胆汁酸对白羽肉鸡屠宰性能的影响
表3 饲粮添加胆汁酸对白羽肉鸡屠宰性能的影响Table 3 Effects of dietary bile acid on slaughter performance of white feather broilers % |
| 项目 Items | 对照组 Control group | 试验组 Experimental group | P值 P-value |
|---|---|---|---|
| 肝脏指数Liver index | 2.60±0.08 | 2.52±0.09 | 0.566 |
| 屠宰率Dressing percentage | 92.57±0.38 | 93.73±0.24 | 0.032 |
| 腹脂率Abdominal fat percentage | 1.98±0.11 | 1.72±0.07 | 0.071 |
2.3 饲粮添加胆汁酸对肉鸡肝脏脂肪指标的影响
表4 饲粮添加胆汁酸对白羽肉鸡肝脏脂肪指标的影响Table 4 Effects of dietary bile acid on liver fat indices of white feather broilers |
| 项目 Items | 对照组 Control group | 试验组 Experimental group | P值 P-value |
|---|---|---|---|
| 脂肪含量Fat content/% | 5.34±0.00 | 3.96±0.00 | 0.054 |
| 脂肪酶活性Lipase activity/(U/g prot) | 11.01±1.21 | 14.32±1.72 | 0.166 |
2.4 饲粮添加胆汁酸对肉鸡血清生化指标的影响
表5 饲粮添加胆汁酸对白羽肉鸡血清生化指标的影响Table 5 Effects of dietary bile acid on serum biochemical indices of white feather broilersmmol/L |
| 项目 Items | 对照组 Control group | 试验组 Experimental group | P值 P-value |
|---|---|---|---|
| 葡萄糖GLU/(mmol/L) | 11.18±0.60 | 11.44±0.97 | 0.813 |
| 甘油三酯TG/(mmol/L) | 0.32±0.02 | 0.27±0.02 | 0.090 |
| 总胆固醇TC/(mmol/L) | 2.94±0.18 | 2.69±0.33 | 0.489 |
| 高密度脂蛋白HDL/(mmol/L) | 1.49±0.03 | 1.63±0.15 | 0.346 |
| 低密度脂蛋白LDL/(mmol/L) | 0.47±0.03 | 0.40±0.02 | 0.272 |
| 谷草转氨酶AST/(U/L) | 338.53±10.53 | 284.46±14.16 | 0.022 |
2.5 饲粮添加胆汁酸对白羽肉鸡回肠养分表观消化率的影响
表6 饲粮添加胆汁酸对白羽肉鸡回肠养分表观消化率的影响Table 6 Effects of dietary bile acid on nutrient apparent digestibility in ileum of white feather broilers% |
| 项目 Items | 对照组 Control group | 试验组 Experimental group | P值 P-value |
|---|---|---|---|
| 干物质DM | 83.76±1.50 | 84.15±0.37 | 0.809 |
| 粗脂肪EE | 72.48±3.36 | 73.77±2.11 | 0.761 |
| 粗蛋白质CP | 69.62±0.01 | 71.56±0.01 | 0.260 |
| 酸性洗涤纤维ADF | 34.50±2.19 | 35.44±2.80 | 0.841 |
| 中性洗涤纤维NDF | 40.66±0.53 | 40.10±1.81 | 0.849 |

京公网安备 11010802041926号