1 材料与方法
1.1 试验设计与饲养管理
表1 Feeding amount of calvesL/次Table 1 |
| 日龄 Days of age | 饲喂量 Feeding amount |
|---|---|
| 2~3 | 4.0 |
| 4~30 | 5.0 |
| 31~50 | 6.0 |
| 51~55 | 4.5 |
| 56 | 4.0 |
| 57 | 3.5 |
| 58 | 3.0 |
| 59 | 2.5 |
| 60 | 2.0 |
表2 开食料和代乳粉营养水平Table 2 Nutrient levels of starter and milk replacer% |
| 项目 Items | 开食料 Starter | 代乳粉 Milk replacer |
|---|---|---|
| 干物质 DM | 96.89 | 95.79 |
| 粗蛋白质 CP | 24.84 | 22.45 |
| 粗灰分 Ash | 2.67 | 7.22 |
| 粗脂肪 EE | 7.69 | 8.99 |
| 中性洗涤纤维 NDF | 7.76 | 0.78 |
| 酸性洗涤纤维 ADF | 4.96 | 0.54 |
表3 初乳和常乳密度及营养水平Table 3 Nutrient levels and density of colostrum and normal milk |
| 项目 Items | 初乳 Colostrum | 常乳 Normal milk |
|---|---|---|
| 密度 Density/(g/L) | 1 046 | 1 034 |
| 乳蛋白 Milk protein/% | 18.11 | 3.23 |
| 乳脂肪 Milk fat/% | 13.37 | 3.65 |
| 总固形物 Total solid/% | 36.85 | 13.18 |
| 非脂固形物 Solid non-fat/% | 22.84 | 9.53 |
| 乳糖 Lactose/% | 2.71 | 4.91 |
1.2 样品采集及测定
1.2.1 初乳、常乳、代乳粉和开食料营养水平
1.2.2 生长性能
1.2.3 血清抗氧化指标
1.2.4 腹泻频率
腹泻频率(%)=100×腹泻次数/粪便排泄次数。
1.3 数据统计分析
2 结果
2.1 丁酸梭菌对哺乳犊牛生长性能的影响
表4 丁酸梭菌对哺乳犊牛生长性能的影响Table 4 Effects of Clostridium butyricum on growth performance of lactating calves |
| 项目 Items | 组别 Groups | SEM | P值 P-value | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CB0 | CB0.2 | CB0.4 | CB0.8 | CB1.6 | 处理 Treatment | 线性 Linear | 二次 Quadratic | ||||||||||||
| 3日龄体重 Body weight at 3 days of age | 38.90 | 37.51 | 38.30 | 37.87 | 38.43 | 0.780 | 0.758 | 0.817 | 0.360 | ||||||||||
| 60日龄体重 Body weight at 60 days of age | 84.20 | 82.60 | 82.40 | 82.27 | 83.87 | 1.823 | 0.913 | 0.863 | 0.346 | ||||||||||
| 平均日增重 Average daily gain/(kg/d) | 0.79 | 0.79 | 0.77 | 0.78 | 0.80 | 0.027 | 0.967 | 0.931 | 0.520 | ||||||||||
| 开食料采食量 Starter intake/(g/d DM) | 561.84 | 538.27 | 484.56 | 485.05 | 523.59 | 41.770 | 0.634 | 0.337 | 0.267 | ||||||||||
| 常乳(代乳粉)采食量 Normal milk(milk replacer) intake/(g/d DM) | 1 260.60 | 1 259.33 | 1 259.96 | 1 258.89 | 1 260.60 | 0.905 | 0.586 | 0.878 | 0.213 | ||||||||||
| 总采食量 Total feed intake/(g/d DM) | 1 822.44 | 1 797.59 | 1 744.48 | 1 743.94 | 1 784.29 | 41.766 | 0.622 | 0.335 | 0.255 | ||||||||||
| 料重比 Feed to gain ratio | 2.33 | 2.29 | 2.23 | 2.26 | 2.23 | 0.066 | 0.787 | 0.281 | 0.615 | ||||||||||
同行数据肩标不同小写字母表示差异显著(P<0.05),不同大写字母表示差异极显著(P<0.01),相同小写字母或无字母表示差异不显著(P>0.05)。下表同。 | |
In the same row, values with different small letter superscripts mean significant difference (P<0.05), and with different capital letter superscripts mean significant difference (P<0.01), while with the same small letter or no letter superscripts mean no significant difference (P>0.05). The same as below. |
2.2 丁酸梭菌对哺乳犊牛血清抗氧化指标的影响
表5 丁酸梭菌对哺乳犊牛血清抗氧化指标的影响Table 5 Effects of Clostridium butyricum on serum antioxidant indexes of lactating calves |
| 项目 Items | 组别 Groups | SEM | P值 P-value | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| CB0 | CB0.2 | CB0.4 | CB0.8 | CB1.6 | 处理 Treatment | 线性 Linear | 二次 Quadratic | |||
| 超氧化物歧化酶 SOD/(U/mL) | ||||||||||
| 3日龄 3 days of age | 136.66 | 139.83 | 139.10 | 137.64 | 137.57 | 1.931 | 0.798 | 0.953 | 0.344 | |
| 14日龄 14 days of age | 137.98Bb | 141.63ABab | 138.63ABb | 147.30Aa | 142.84ABab | 2.318 | 0.001 | 0.040 | 0.602 | |
| 28日龄 28 days of age | 144.43 | 153.41 | 151.75 | 148.95 | 146.76 | 2.678 | 0.131 | 0.981 | 0.022 | |
| 42日龄 42 days of age | 86.64Bc | 89.40ABab | 87.51ABac | 90.25Ab | 88.03ABabc | 0.842 | 0.001 | 0.180 | 0.100 | |
| 60日龄 60 days of age | 88.73 | 89.51 | 91.10 | 91.18 | 89.75 | 0.827 | 0.174 | 0.154 | 0.058 | |
| 谷胱甘肽过氧化物酶 GSH-Px/(U/mL) | ||||||||||
| 3日龄 3 days of age | 306.68 | 301.79 | 304.47 | 304.07 | 299.95 | 7.960 | 0.980 | 0.658 | 0.959 | |
| 14日龄 14 days of age | 221.84 | 226.38 | 228.26 | 226.62 | 229.47 | 5.962 | 0.917 | 0.414 | 0.758 | |
| 28日龄 28 days of age | 224.00 | 234.50 | 234.57 | 239.78 | 236.16 | 7.729 | 0.679 | 0.231 | 0.428 | |
| 42日龄 42 days of age | 149.57 | 170.54 | 151.81 | 171.99 | 179.62 | 8.115 | 0.051 | 0.023 | 0.690 | |
| 60日龄 60 days of age | 179.24 | 175.17 | 171.94 | 185.71 | 175.38 | 8.917 | 0.843 | 0.921 | 0.893 | |
| 丙二醛 MDA/(nmol/mL) | ||||||||||
| 3日龄 3 days of age | 3.17 | 3.49 | 3.66 | 3.44 | 3.41 | 0.170 | 0.434 | 0.420 | 0.108 | |
| 14日龄 14 days of age | 2.16 | 2.05 | 2.21 | 2.16 | 2.02 | 0.093 | 0.584 | 0.551 | 0.483 | |
| 28日龄 28 days of age | 2.31Aa | 1.99ABb | 1.94ABb | 1.76Bb | 1.92ABb | 0.127 | 0.001 | 0.013 | 0.083 | |
| 42日龄 42 days of age | 3.27 | 2.56 | 2.52 | 2.48 | 2.52 | 0.266 | 0.199 | 0.077 | 0.137 | |
| 60日龄 60 days of age | 1.57 | 1.21 | 1.20 | 1.18 | 1.25 | 0.110 | 0.085 | 0.060 | 0.047 | |
2.3 丁酸梭菌对哺乳犊牛腹泻频率的影响
表6 丁酸梭菌对哺乳犊牛腹泻频率的影响Table 6 Effects of Clostridium butyricum on diarrhea frequency of lactating calves |
| 项目 Items | 组别 Groups | SEM | P值 P-value | ||||||
|---|---|---|---|---|---|---|---|---|---|
| CB0 | CB0.2 | CB0.4 | CB0.8 | CB1.6 | 处理 Treatment | 线性 Linear | 二次 Quadratic | ||
| 3~14日龄 3 to 14 days of age | 0.339 | 0.276 | 0.319 | 0.291 | 0.301 | 0.065 | 0.966 | 0.768 | 0.761 |
| 15~28日龄 15 to 28 days of age | 0.328 | 0.170 | 0.207 | 0.171 | 0.146 | 0.060 | 0.228 | 0.061 | 0.396 |
| 29~42日龄 29 to 42 days of age | 0.377Aa | 0.103Bb | 0.066Bb | 0.030Bb | 0.137Bb | 0.052 | <0.001 | 0.001 | <0.001 |
| 43~60日龄 43 to 60 days of age | 0.226Aa | 0.144ABb | 0.065Bb | 0.035Bb | 0.049Bb | 0.039 | 0.004 | <0.001 | <0.001 |
| 3~60日龄 3 to 60 days of age | 0.317Aa | 0.189Bb | 0.161Bb | 0.122Bb | 0.139Bb | 0.026 | <0.001 | <0.001 | 0.006 |

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