1 材料与方法
1.1 试验原料
表1 油莎豆营养成分含量(风干基础)Table 1 Nutrient contents of tiger nuts (air-dry basis) % |
| 项目Items | 含量Content | 项目Items | 含量Content | |
|---|---|---|---|---|
| 干物质DM | 89.14 | 赖氨酸Lys | 0.18 | |
| 粗蛋白质CP | 4.61 | 蛋氨酸Met | 0.07 | |
| 粗灰分Ash | 2.18 | 胱氨酸Cys | 0.07 | |
| 粗脂肪EE | 19.27 | 苯丙氨酸Phe | 0.14 | |
| 钙Ca | 0.02 | 酪氨酸Tyr | 0.09 | |
| 磷P | 0.32 | 苏氨酸Thr | 0.15 | |
| 淀粉Starch | 30.39 | 色氨酸Trp | 0.04 | |
| 粗纤维CF | 7.48 | 缬氨酸Val | 0.20 | |
| 中性洗涤纤维NDF | 15.30 | 丙氨酸Ala | 0.20 | |
| 酸性洗涤纤维ADF | 8.08 | 天门冬氨酸Asp | 0.32 | |
| 总能GE/(MJ/kg) | 19.88 | 谷氨酸Glu | 0.37 | |
| 氨基酸Amino acids | 甘氨酸Gly | 0.17 | ||
| 精氨酸Arg | 0.65 | 丝氨酸Ser | 0.14 | |
| 组氨酸His | 0.05 | 脯氨酸Pro | 0.10 | |
| 异亮氨酸Ile | 0.12 | 氨基酸总量TAA | 3.18 | |
| 亮氨酸Leu | 0.23 |
1.2 试验动物与饲养管理
1.3 试验饲粮
表2 基础饲粮组成及营养水平(风干基础)Table 2 Composition and nutrient levels of the basal diet (air-dry basis) % |
| 项目Items | 含量Content |
|---|---|
| 原料Ingredients | |
| 玉米Corn | 68.79 |
| 豆粕Soybean meal | 23.88 |
| 豆油Soybean oil | 2.89 |
| 磷酸氢钙Ⅰ型CaHPO4 type Ⅰ | 1.25 |
| 石粉Limestone | 1.40 |
| L-赖氨酸盐酸盐L-Lys·HCl | 0.50 |
| DL-蛋氨酸DL-Met | 0.25 |
| L-苏氨酸L-Thr | 0.10 |
| 氯化胆碱Choline chloride | 0.15 |
| 氯化钠NaCl | 0.26 |
| 碳酸氢钠NaHCO3 | 0.13 |
| 矿物质预混料Mineral premix1) | 0.20 |
| 维生素预混料Vitamin premix2) | 0.20 |
| 合计Total | 100.00 |
| 营养水平Nutrient levels3) | |
| 代谢能ME/(MJ/kg) | 12.86 |
| 粗蛋白质CP | 16.66 |
| 粗纤维CF | 2.55 |
| 粗脂肪EE | 5.73 |
| 钙Ca | 0.90 |
| 磷P | 0.55 |
| 赖氨酸Lys | 1.09 |
| 苏氨酸Thr | 0.69 |
| 蛋氨酸+胱氨酸Met+Cys | 0.74 |
1)矿物质预混料为每千克饲粮提供 Mineral premix provided the following per kilogram of the diet:Fe (FeSO4·H2O) 80 mg,Zn (ZnSO4·H2O) 100 mg,Mn (MnSO4·H2O) 110 mg,Cu (CuSO4·5H2O) 10 mg,I (KI) 0.6 mg,Se (NaSe2O3) 0.35 mg。 2)维生素预混料为每千克饲粮提供 Vitamin premix provided the following per kilogram of the diet:VA 9 500 IU,VD3 2 000 IU,VE 12 IU,VK 1.0 mg,VB1 1.30 mg,VB2 5.60 mg,VB6 2.80 mg,VB12 0.01 mg,烟酸 nicotinic acid 68 mg,泛酸 pantothenic acid 10 mg,生物素 biotin 0.10 mg,叶酸 folic acid 0.90 mg。 3)营养水平是由Brill饲料配方软件按照原料数据库中营养指标计算得出。Nutrient levels are calculated by the Brill feed formulation software based on nutrient indicators in the raw material database. |
1.4 样品的收集制备
1.5 指标的测定方法
1.6 指标的计算公式
1.7 数据处理与分析
2 结果与分析
2.1 生长性能
表3 油莎豆对中速型黄羽肉鸡生长性能的影响Table 3 Effects of tiger nuts on growth performance of medium-growing yellow-feathered broilers g |
| 项目Items | 对照组CG | 待测组TG | P值P-value |
|---|---|---|---|
| 总采食量Total feed intake | 516.63±28.43 | 518.82±29.14 | 0.959 |
| 末重Final body weight | 2 638.41±50.93 | 2 610.88±43.59 | 0.686 |
同行数据肩标无字母或相同字母表示差异不显著(P>0.05),不同小写字母表示差异显著(P<0.05)。 | |
In the same row, values with no letter or the same letter superscripts mean no significant difference (P>0.05), while with different small letter superscripts mean significant difference (P<0.05). |
2.2 饲粮和排泄物中GE和常规营养成分含量
表4 饲粮中GE和常规营养成分含量实测值(风干基础)Table 4 Measured values of GE and common nutrient contents in diets (air-dry basis) % |
| 项目Items | 对照组CG | 待测组TG | 参考水平Reference level[12] |
|---|---|---|---|
| 总能GE/(MJ/kg) | 16.43 | 17.10 | — |
| 粗蛋白质CP | 16.80 | 14.84 | 16.00 |
| 粗脂肪EE | 5.16 | 7.61 | — |
| 粗纤维CF | 2.96 | 4.19 | — |
| 钙Ca | 0.91 | 0.69 | 0.70 |
| 磷P | 0.54 | 0.48 | 0.49 |
| 氮N | 2.69 | 2.37 | 2.56 |
表5 常规排泄物和内源排泄物的GE和常规营养成分含量(干物质基础)Table 5 GE and common nutrient contents in normal excreta and endogenous excreta (DM basis) % |
| 项目 Items | 常规排泄物Normal excreta | 内源排泄物Endogenous excreta | |||
|---|---|---|---|---|---|
| 对照组CG | 待测组TG | 对照组CG | 待测组TG | ||
| 总能GE/(MJ/kg) | 14.28±0.21 | 14.99±0.27 | 10.11±0.59 | 9.07±0.40 | |
| 粗蛋白质CP | 31.96±0.57 | 29.58±0.78 | 92.72±4.79 | 85.48±6.72 | |
| 粗脂肪EE | 4.45±0.51 | 6.63±0.77 | 2.19±0.20 | 1.74±0.30 | |
| 粗纤维CF | 10.29±0.30 | 10.97±0.43 | 0.72±0.12 | 0.70±0.10 | |
| 钙Ca | 2.22±0.09 | 1.50±0.07 | 0.52±0.01 | 0.34±0.02 | |
| 磷P | 1.25±0.05 | 1.09±0.04 | 1.74±0.08 | 1.77±0.09 | |
| 氮N | 5.11±0.09 | 4.73±0.13 | 14.84±0.77 | 13.68±1.08 | |
2.3 饲粮及油莎豆的氮平衡和能量代谢
表6 饲粮的氮平衡及能量代谢Table 6 Nitrogen balance and energy metabolism of diets |
| 项目Items | 对照组CG | 待测组TG |
|---|---|---|
| 食入氮Nitrogen intake/g | 13.20±1.10 | 12.29±0.35 |
| 排出氮Nitrogen excretion/g1) | 7.93±0.52 | 7.56±0.31 |
| 表观氮沉积率RN1/% | 0.35±0.02 | 0.31±0.01 |
| 真氮沉积率RN2/% | 0.43±0.01 | 0.38±0.01 |
| 氮利用率Nitrogen availability/% | 39.45±2.14 | 38.56±1.21 |
| 食入能量Energy intake/MJ | 8.07±0.67 | 8.85±0.25 |
| 排出能量Energy excretion/MJ2) | 2.19±0.16 | 2.46±0.16 |
| 表观代谢能AME/(MJ/kg) | 11.92±0.26 | 12.36±0.24 |
| 真代谢能TME/(MJ/kg) | 12.08±0.25 | 12.50±0.24 |
| 氮校正表观代谢能AMEn/(MJ/kg) | 11.80±0.25 | 12.25±0.24 |
| 氮校正真代谢能TMEn/(MJ/kg) | 11.93±0.25 | 12.38±0.24 |
| 总能代谢率GE metabolizability/% | 72.59±1.56 | 72.30±1.39 |
1)对照组和待测组的内源氮排出量分别为(1.10±0.08) g和(1.12±0.07) g。Endogenous nitrogen excretions of CG and TG were (1.10±0.08) g and (1.12±0.07) g, respectively. 2)对照组和待测组的内源排泄物能量分别为(0.08±0.01) MJ和(0.07±0.00) MJ。Endogenous energy excretions of CG and TG were (0.08±0.01) MJ and (0.07±0.00) MJ, respectively. |
表7 油莎豆的氮平衡及能量代谢Table 7 Nitrogen balance and energy metabolism of tiger nuts |
| 项目Items | 油莎豆Tiger nuts |
|---|---|
| 表观氮沉积率RN1/% | 0.11±0.05 |
| 真氮沉积率RN2/% | 0.17±0.05 |
| 氮利用率Nitrogen availability/% | 34.97±6.03 |
| 表观代谢能AME/(MJ/kg) | 14.10±1.19 |
| 真代谢能TME/(MJ/kg) | 14.19±1.20 |
| 氮校正表观代谢能AMEn/(MJ/kg) | 14.07±1.18 |
| 氮校正真代谢能TMEn/(MJ/kg) | 14.14±1.19 |
| 总能代谢率GE metabolizability/% | 71.12±6.97 |
2.4 饲粮及油莎豆的养分代谢率
表8 饲粮的养分代谢率Table 8 Metabolizability of nutrients in diets % |
| 项目 Items | 表观代谢率Apparent metabolizability | 真代谢率True metabolizability | |||
|---|---|---|---|---|---|
| 对照组CG | 待测组TG | 对照组CG | 待测组TG | ||
| 粗蛋白质CP | 39.45±2.14 | 38.56±1.21 | 48.01±1.64 | 47.63±1.35 | |
| 粗脂肪EE | 76.12±3.03 | 77.48±2.93 | 76.79±2.98 | 77.86±2.94 | |
| 粗纤维CF | 4.40±0.37 | 15.27±1.98 | 4.75±0.37 | 15.55±1.97 | |
| 钙Ca | 23.68±1.28 | 33.52±2.90 | 24.63±1.36 | 34.31±2.91 | |
| 磷P | 25.27±0.74 | 32.33±2.67 | 30.35±0.77 | 38.15±2.81 | |
表9 油莎豆的养分代谢率Table 9 Metabolizability of nutrients in tiger nuts % |
| 项目Items | 表观代谢率Apparent metabolizability | 真代谢率True metabolizability |
|---|---|---|
| 粗蛋白质CP | 50.19±11.16 | 62.01±9.65 |
| 粗脂肪EE | 99.29±9.97 | 98.68±9.97 |
| 粗纤维CF | 58.76±9.90 | 58.76±9.84 |
| 钙Ca | 80.29±10.02 | 80.57±9.99 |
| 磷P | 66.93±8.20 | 75.08±7.37 |
