1 材料与方法
1.1 试验设计
表1 基础饲粮组成及营养水平(干物质基础)Table 1 Composition and nutrient levels of basal diets (DM basis)% |
| 项目 Items | 产前 Prepartum | 产后 Postpartum | |||
|---|---|---|---|---|---|
| 原料 Ingredients | |||||
| 青贮玉米 Silage corn | 21.98 | 21.65 | |||
| 燕麦干草 Oaten hay | 25.64 | 4.33 | |||
| 苜蓿干草 Alfalfa hay | 18.94 | ||||
| 小麦秸 Wheat straw | 7.33 | ||||
| 玉米 Corn | 7.33 | 16.23 | |||
| 豆粕 Soybean meal | 11.71 | 7.58 | |||
| 玉米干酒糟及其可溶物 Corn DDGS | 7.33 | 4.33 | |||
| 大豆皮 Soybean peel | 6.59 | 2.71 | |||
| 玉米胚芽粕 Corn germ meal | 4.40 | 2.16 | |||
| 麸皮 Bran | 3.65 | ||||
| 蒸汽压片玉米 Steam-flaked corn | 5.41 | ||||
| 甜菜粕 Beet meal | 3.79 | ||||
| 玉米蛋白粉 Corn gluten meal | 2.71 | ||||
| 膨化大豆 Expanded soybean | 1.62 | ||||
| 全棉籽 Whole cottonseed | 2.71 | ||||
| 糖蜜 Molasses | 2.71 | ||||
| 石粉 Limestone | 2.20 | 0.80 | |||
| 磷酸氢钙 CaHPO4 | 1.47 | 0.38 | |||
| 小苏打 NaHCO3 | 0.54 | ||||
| 氯化钠 NaCl | 0.54 | ||||
| 脂肪粉 Fatty powder | 0.32 | ||||
| 产前预混料 Prepartum premix1) | 0.37 | ||||
| 产后预混料 Postpartum premix2) | 0.54 | ||||
| 合计 Total | 100.00 | 100.00 | |||
| 营养水平 Nutrient levels3) | |||||
| 泌乳净能 NEL/(MJ/kg) | 5.91 | 6.28 | |||
| 粗蛋白质 CP | 15.31 | 17.33 | |||
| 粗脂肪 EE | 5.59 | 6.17 | |||
| 中性洗涤纤维 NDF | 43.92 | 30.35 | |||
| 钙/磷 Ca/P | 1.95 | 1.92 |
1) 每千克产前预混料含有 One kg prepartum premix contained the following: VA 2 500 000 IU,VD 150 000 IU,VE 5 000 IU,I 110 mg,Se 20 mg,Co 25 mg,Cu 950 mg,Zn 5 000 mg,Mn 4 500 mg。 2) 每千克产后预混料含有 One kg postpartum premix contained the following:VA 350 000 IU,VD 150 000 IU,VE 6 000 IU,I 80 mg,Se 30 mg,Co 40 mg,Cu 1 000 mg,Zn 6 000 mg,Mn 4 900 mg。 3) 奶牛泌乳净能是依据中国饲料数据库计算得出,其余营养水平均为实测值。NEL was calculated according to China Feed Database,while the other nutrient levels were measured values. |
1.2 样品采集
1.2.1 血清样品
1.2.2 初乳样品收集及品质检测
1.3 数据记录及指标检测
1.3.1 在胎天数和新生犊牛体重
1.3.2 血清抗氧化指标
1.3.3 血清免疫指标
1.4 数据统计分析
2 结果与分析
2.1 红发夫酵母对奶牛在胎天数、犊牛出生重和初乳质量的影响
表2 奶牛在胎天数、犊牛出生重和初乳折光率Table 2 Fetal days, calf birth weight and colostrum refraction rate of dairy cows |
| 项目 Items | 对照组 Control group | Ⅰ组 Group Ⅰ | Ⅱ组 Group Ⅱ |
|---|---|---|---|
| 在胎天数 Fetal days/d | 275.92±0.80a | 278.81±0.86b | 278.36±0.85b |
| 犊牛出生重 Calf birth weight/kg | 37.82±1.03 | 40.21±1.25 | 39.40±0.90 |
| 母犊出生重 Female birth weight/kg | 37.21±1.05 | 38.58±1.09 | 38.54±0.56 |
| 初乳折光率 Colostrum refractive rate/% | 27.96±0.25 | 27.95±0.35 | 27.88±0.26 |
| 母犊占比 Proportion of females/% | 83.33 | 63.33 | 70.00 |
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)。下表同。 | |
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). The same as below. |
2.2 红发夫酵母对围产期奶牛血清抗氧化指标的影响
表3 红发夫酵母对围产期奶牛血清抗氧化指标的影响Table 3 Effects of Phaffia rhodozyma on serum antioxidant indexes of perinatal dairy cows |
| 项目 Items | 时间 Time/d | 对照组 Control group | Ⅰ组 Group Ⅰ | Ⅱ组 Group Ⅱ | |||||
|---|---|---|---|---|---|---|---|---|---|
| 过氧化氢酶 CAT/(U/mL) | -21 | 6.15±0.99 | 5.80±0.97 | 6.05±0.53 | |||||
| -7 | 10.04±0.84b | 6.27±0.62a | 6.51±0.84a | ||||||
| 0 | 9.48±0.85 | 8.19±1.05 | 8.75±1.03 | ||||||
| 7 | 8.51±2.17 | 9.27±0.94 | 9.17±0.76 | ||||||
| 21 | 6.11±1.29 | 7.57±1.30 | 6.08±0.96 | ||||||
| 谷胱甘肽过氧化物酶 GSH-Px/(U/mL) | -21 | 148.61±16.82 | 131.93±18.50 | 151.51±30.03 | |||||
| -7 | 123.86±13.46a | 121.10±11.00a | 166.50±16.14b | ||||||
| 0 | 166.37±14.08 | 147.26±12.42 | 164.66±22.34 | ||||||
| 7 | 207.84±14.12 | 240.94±30.65 | 194.68±23.46 | ||||||
| 21 | 186.65±12.39 | 166.49±15.68 | 179.85±17.44 | ||||||
| 总抗氧化能力 T-AOC/(U/mL) | -21 | 5.46±0.74 | 5.40±0.37 | 5.50±0.57 | |||||
| -7 | 6.01±0.76 | 4.75±0.65 | 6.78±0.81 | ||||||
| 0 | 5.21±0.45a | 5.58±0.97a | 7.91±1.15b | ||||||
| 7 | 2.03±0.22a | 3.76±0.47b | 4.95±0.63b | ||||||
| 21 | 3.99±0.62a | 4.32±0.76a | 7.60±0.64b | ||||||
| 超氧化物歧化酶 SOD/(U/mL) | -21 | 90.39±3.60 | 89.53±2.59 | 84.74±2.56 | |||||
| -7 | 68.04±3.79a | 70.87±3.27a | 89.54±3.86b | ||||||
| 0 | 73.93±3.60a | 72.32±4.53a | 93.91±3.14b | ||||||
| 7 | 74.31±3.66a | 77.00±3.52a | 91.52±4.95b | ||||||
| 21 | 69.89±4.73a | 76.87±2.25a | 88.35±2.39b | ||||||
| 丙二醛 MDA/(nmol/mL) | -21 | 3.54±0.23 | 3.68±0.19 | 3.58±0.14 | |||||
| -7 | 2.53±0.43 | 2.46±0.21 | 1.99±0.25 | ||||||
| 0 | 3.16±0.38b | 2.78±0.38ab | 2.10±0.15a | ||||||
| 7 | 2.70±0.20b | 2.49±0.18ab | 2.01±0.24a | ||||||
| 21 | 3.75±0.31b | 2.02±0.22a | 1.78±0.18a |
2.3 红发夫酵母对围产期奶牛血清免疫球蛋白含量的影响
表4 红发夫酵母对围产期奶牛血清免疫球蛋白含量的影响Table 4 Effects of Phaffia rhodozyma on serum immunoglobulin contents of perinatal dairy cows |
| 项目 Items | 时间 Time/d | 对照组 Control group | Ⅰ组 Group Ⅰ | Ⅱ组 Group Ⅱ |
|---|---|---|---|---|
| 免疫球蛋白A IgA/(g/mL) | -2 | 307.75±18.71 | 315.60±22.69 | 324.85±8.10 |
| 0 | 327.96±22.61 | 402.47±22.75 | 400.37±29.97 | |
| 7 | 411.11±39.38 | 420.59±30.14 | 471.14±15.30 | |
| 21 | 410.27±23.21a | 509.79±26.42b | 548.03±26.62b | |
| 免疫球蛋白G IgG/(mg/mL) | -21 | 1.13±0.02 | 1.15±0.05 | 1.11±0.03 |
| 0 | 1.32±0.09 | 1.44±0.05 | 1.48±0.08 | |
| 7 | 1.39±0.02a | 1.45±0.07a | 1.75±0.05b | |
| 21 | 1.58±0.10 | 1.76±0.06 | 1.72±0.02 | |
| 免疫球蛋白M IgM/(g/mL) | -21 | 263.18±15.87 | 240.70±18.52 | 255.39±4.09 |
| 0 | 224.21±18.90a | 276.19±17.01ab | 310.75±14.85b | |
| 7 | 279.92±21.50a | 311.93±16.47ab | 355.30±13.03b | |
| 21 | 295.33±22.19 | 342.33±25.54 | 341.80±15.18 |
2.4 红发夫酵母对围产期奶牛血清炎症因子含量的影响
表5 红发夫酵母对围产期奶牛血清炎症因子含量的影响Table 5 Effects of Phaffia rhodozyma on serum inflammatory factor contents of perinatal dairy cowspg/mL |
| 项目 Items | 时间 Time/d | 对照组 Control group | Ⅰ组 Group Ⅰ | Ⅱ组 Group Ⅱ |
|---|---|---|---|---|
| 白细胞介素-1β IL-1β | -21 | 78.96±5.24 | 77.47±4.96 | 75.04±2.19 |
| 0 | 121.11±2.96b | 97.35±6.08a | 94.16±3.32a | |
| 7 | 99.82±4.64b | 97.31±4.01ab | 87.52±2.65a | |
| 21 | 99.07±3.36b | 84.95±4.59a | 80.61±4.17a | |
| 白细胞介素-2 IL-2 | -21 | 191.58±5.44 | 209.05±8.75 | 207.57±6.67 |
| 0 | 225.71±5.75 | 190.31±8.28 | 204.62±16.38 | |
| 7 | 248.02±9.75b | 226.06±9.78ab | 208.69±6.84a | |
| 21 | 289.01±1.32c | 257.16±6.54b | 236.37±6.74a | |
| 白细胞介素-6 IL-6 | -21 | 30.67±2.00 | 30.04±1.82 | 30.48±0.68 |
| 0 | 35.86±1.33 | 35.96±2.72 | 31.98±1.74 | |
| 7 | 34.17±1.65 | 32.50±1.91 | 32.12±1.89 | |
| 21 | 36.09±0.73b | 29.35±2.13a | 29.30±1.52a | |
| 肿瘤坏死因子-α TNF-α | -21 | 30.76±1.31 | 29.79±1.09 | 30.92±0.96 |
| 0 | 38.82±1.99b | 35.93±1.87ab | 32.96±1.29a | |
| 7 | 33.49±0.75 | 32.02±1.72 | 33.07±1.18 | |
| 21 | 32.93±1.93 | 32.35±1.92 | 28.22±1.29 |
