复合酶制剂对泌乳奶牛瘤胃发酵、营养物质表观消化率及生产性能的影响

发布时间：2018-12-11 05:18

【摘要】：本试验旨在研究饲粮中添加不同剂量的复合酶制剂对泌乳奶牛瘤胃发酵、营养物质表观消化率、血清指标及生产性能的影响。选择体重、胎次[(2.30±0.06)胎]、产奶量[(37.00±0.03)kg/d]、泌乳天数[(90±0.15)d]相近的9头泌乳期荷斯坦奶牛,随机分成3组,每组3头。采用3×3拉丁方设计,对照组饲喂基础饲粮,试验组Ⅰ和试验组Ⅱ分别在基础饲粮基础上添加10和20 g/(头·d)的复合酶制剂,进行3期动物试验。每期21 d,其中14 d为预试期,7 d为采样期。结果表明:1)饲粮中添加10 g/(头·d)的复合酶制剂显著提高奶牛瘤胃液中丁酸的浓度(P0.05),而对总挥发性脂肪酸和其他挥发性脂肪酸的浓度无显著影响(P0.05);2)与对照组相比,饲粮中添加10 g/(头·d)的复合酶制剂显著提高奶牛对干物质、粗蛋白质和中性洗涤纤维的表观消化率(P0.05),对酸性洗涤纤维的表观消化率也有一定的提高作用(P=0.06);3)饲粮中添加10和20 g/(头·d)的复合酶制剂显著提高了奶牛的产奶量(P0.05),且10 g/(头·d)组的4%校正乳(4%FCM)产量、乳脂产量和乳糖产量分别较对照组提高4.85(P0.05)、0.49(P0.05)和0.32 kg/d(P0.05);4)复合酶制剂的添加未对奶牛血清指标产生显著影响(P0.05)。综上,饲粮中添加10 g/(头·d)复合酶制剂能够显著提高泌乳奶牛的产奶量、乳脂产量和瘤胃液丁酸浓度,且饲喂效果优于添加量为20 g/(头·d)时。综合考虑,泌乳奶牛饲粮中复合酶制剂的推荐添加量为10 g/(头·d)。
[Abstract]:The purpose of this study was to study the effects of different doses of compound enzyme preparation on the rumen fermentation, apparent digestibility, serum index and production performance of lactating dairy cows. The cows were randomly divided into 3 groups, 3 groups in each group, with the weight of (2.30%. 06), the milk yield[(37. 00-0.03) kg/ day], the number of days of lactation[(90% 0.15) d]. The 3-3 Latin square design was adopted, and the control group was fed with the basal feed, and the test group I and the test group II respectively added 10 and 20 g/ (head 路 d) of the composite enzyme preparation on the basis of the basal feed, and the three-stage animal experiment was carried out. Each period of 21d, where 14d is the pre-test period, and 7d is the sampling period. The results showed that: 1) The addition of 10 g/ (head 路 d) of the composite enzyme preparation in the feed of the feed significantly increased the concentration of butyric acid in the gastric juice of the dairy cattle (P0.05), and the concentration of the total volatile fatty acid and other volatile fatty acids had no significant effect (P0.05); and 2) compared with the control group, The apparent digestibility of dry matter, crude protein and neutral washing fiber was significantly improved by adding 10 g/ (head. d) of the composite enzyme preparation to the feed, and the apparent digestibility of the acidic wash fiber was also improved (P = 0.06). 3) The compound enzyme preparation supplemented with 10 and 20 g/ (head 路 d) in the feed significantly increased the milk yield of the dairy cows (P0.05), and the yield of 4% (4% FCM) of the 10 g/ (head 路 d) group was higher by 4.85 (P0.05), 0.49 (P0.05) and 0.32kg/ d in the control group (P0.05). 4) The addition of complex enzyme preparation had no significant effect on the serum index of dairy cows (P0.05). In general, the addition of 10 g/ (head 路 d) complex enzyme preparation in the feed can significantly improve the milk yield, milk fat yield and the concentration of butyric acid in the rumen fluid of the lactating dairy cows, and the feeding effect is better than that of the addition amount of 20 g/ (head 路 d). The recommended addition of compound enzyme preparation in lactating dairy cows was 10 g/ (head 路 d).
【作者单位】：新疆农业大学动物科学学院;中国农业大学动物科学技术学院动物营养学国家重点实验室北京市生鲜乳质量安全工程技术研究中心;
【基金】：现代农业(奶牛)产业技术体系建设专项(CARS-37) 国家自然科学基金青年基金项目(31402099) 湖南省重点研发计划农业领域技术创新项目(2016NK2074)
【分类号】：S823.5

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