动物营养学报 >

2022 , Vol. 34 >Issue 4: 2476 - 2484

DOI: https://doi.org/10.3969/j.issn.1006-267x.2022.04.042

研究论文 RESEARCH PAPER

过瘤胃脂肪对产后肉母牛生长性能、血清指标及繁殖性能的影响

  • 王建东 ,
  • 唐玉林 ,
  • 侯鹏霞 ,
  • 康晓冬 ,
  • 于洋 ,
  • 梁小军
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  • 1. 宁夏农林科学院动物科学研究所, 银川 750002;
    2. 宁夏大学农学院, 银川 750021
王建东(1980-),男,宁夏同心人,副研究员,硕士,从事反刍动物健康养殖和疾病防治。E-mail:jiandongwang668@126.com

收稿日期: 2021-09-05

  网络出版日期: 2022-04-14

基金资助

农业高质量发展和生态保护科技创新示范课题——肉牛高效繁殖技术研究（NGSB-2021-12-03）；国家肉牛牦牛产业技术体系专项（CARS-37）

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Effects of Rumen Bypass Fat on Growth Performance, Serum Indexes and Reproductive Performance of Postpartum Beef Cows

  • WANG Jiandong ,
  • TANG Yulin ,
  • HOU Pengxia ,
  • KANG Xiaodong ,
  • YU Yang ,
  • LIANG Xiaojun
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  • 1. Institute of Animal Science, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China;
    2. College of Agriculture, Ningxia University, Yinchuan 750021, China

Received date: 2021-09-05

  Online published: 2022-04-14

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摘要

本试验旨在探究饲粮中添加过瘤胃脂肪对肉母牛生长性能、血清指标及繁殖性能的影响。试验选用体况评分5~6分、胎次2胎、产后1周内的安格斯母牛40头，随机分为4组，每组10头，第1组饲喂基础饲粮，第2、3、4组分别在基础饲粮中添加150、200、250 g/头的过瘤胃脂肪，集中饲喂60 d，自由饮水。结果表明:1）产后肉母牛初始体重和体况各组之间无显著差异（P>0.05），终末体重第3、4组较第1组有显著增加（P<0.05），终末体况第4组较第1组显著增加（P<0.05）。2）血清总蛋白（TP）和白蛋白（ALB）含量各组之间无显著差异（P>0.05）；血清尿素氮（UN）含量第4组较第1组显著升高（P<0.05），血清葡萄糖（GLU）和甘油三酯（TG）含量第4组较第1、2组极显著升高（P<0.01）；血清胰岛素（INS）含量第4组较第1、2组显著升高（P<0.05）；血清胰岛素样生长因子结合蛋白-2（IGFBP-2）含量第4组极显著低于第1组（P<0.01），第3组显著低于第1组（P<0.05）；血清胰岛素样生长因子结合蛋白-4（IGFBP-4）含量第4组极显著高于第1组（P<0.05），第3组显著高于第1组（P<0.05）；血清抗苗勒管激素（AMH）含量第4组极显著低于其他3个组（P<0.01），血清雌激素（E2）含量第4组显著低于第1组（P<0.05）；血清抑制素B（INHB）含量第3、4组显著低于第1组（P<0.05）。3）妊娠率第1、2组高于第3、4组，但差异不显著（P>0.05）；产后第1次发情时间第4组极显著高于其他各组（P<0.01），第3组显著高于第1组（P<0.05）；产后第1次配种天数第4组极显著高于第1、2组（P<0.01），第3组显著高于第1组（P<0.05）。综上所述，在本试验条件下，产后体况评分为5~6分的安格斯母牛饲粮中添加过瘤胃脂肪导致其体况评分增加，血清相关指标发生改变，母牛繁殖性能下降，且随着饲粮中过瘤胃脂肪添加量的增加，影响越显著。

关键词： 过瘤胃脂肪; 产后母牛; 体况评分; 血清指标; 繁殖性能

本文引用格式

王建东 , 唐玉林 , 侯鹏霞 , 康晓冬 , 于洋 , 梁小军 . 过瘤胃脂肪对产后肉母牛生长性能、血清指标及繁殖性能的影响[J]. 动物营养学报, 2022 , 34(4) : 2476 -2484 . DOI: 10.3969/j.issn.1006-267x.2022.04.042

Abstract

The purpose of this experiment was to explore the effects of adding rumen bypass fat to the diet on the growth performance, serum indexes and reproductive performance of postpartum beef cows. The test selected 40 Angus cows with body condition scores 5 to 6, two times of parity, and all Angus cows within 1 week after delivery, randomly divided into 4 groups of 10 heads each. The group 1 was fed a basal diet, and groups 2, 3 and 4 were supplemented with 150, 200 and 250 g/head rumen bypass fat in the basal diet, concentrated feeding for 60 days, drinking water freely. The results showed as follows:1) the initial body weight and body condition of postpartum beef cows were not significantly different between groups (P>0.05). The final body weight of groups 3 was increased significantly compared with the group 1 (P<0.05), and the final body condition of the group 4 was significantly increased compared with the group 1 (P<0.05). 2) Total protein (TP) and albumin (ALB) contents in serum had no significant difference between groups (P<0.05), urea nitrogen (UN) content of group 4 was significantly higher than that of group 1 (P<0.05), glucose (GLU) and triglycerides (TG) contents of group 4 were significantly higher than those of groups 1 and 2 (P<0.01). Serum insulin (INS) content of group 4 was significantly higher than that of groups 1 and 2 (P<0.05), bovine insulin-like growth factor binding protein-2 (IGFBP-2) content of group 4 was significantly lower than that of group 1 (P<0.01), group 3 was significantly lower than group 1 (P<0.05), bovine insulin-like growth factor binding protein-4 (IGFBP-4) content of group 4 was significantly higher than that of group 1 (P<0.05), and the group 3 was significantly higher than group 1(P<0.05). The content of anti-mullerian hormone (AMH) of group 4 was significantly lower than that of the other 3 groups (P<0.01), the content of estrogen (E2) in serum of group 4 was significantly lower than that of group 1 (P<0.05), the content of inhibin B (INHB) of groups 3 and 4 was significantly lower than that of group 1 (P<0.05), the content of progesterone (P4) in serum was not significantly different among groups (P>0.05). 3) The pregnancy rate of groups 1 was higher than that of groups 3 and 4, but the difference was not significant (P>0.05), the first estrus time after delivery of group 4 was significantly higher than that of groups 1, 2 and 3 (P<0.01), the group 3 was significantly higher than group 1 (P<0.05), the first mating days after childbirth of group 4 was significantly higher than that of groups 1 and 2 (P<0.01), the group 3 was significantly higher than group 1 (P<0.05). In summary, under the conditions of this experiment, adding rumen fat to the diet of Angus cows with a postpartum body condition score of 5 to 6 will result in a significant increase in their body condition score, a significant change in serum indicators, and a significant decrease in the reproductive performance of the cows. As the amount of rumen bypass fat in the diet increases, the impact is more significant.

Key words： rumen bypass fat; postpartum cow; body condition score; serum indexes; reproductive performance

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