动物营养学报 >

2020 , Vol. 32 >Issue 7: 3224 - 3233

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.07.032

反刍与草食动物营养与饲料 RUMINANT AND HERBIVORE NUTRITION AND FEED

N-氨甲酰谷氨酸对荷斯坦奶公牛氮代谢的影响

  • 孙雪丽 ,
  • 李秋凤 ,
  • 曹玉凤 ,
  • 李树静 ,
  • 张秀江 ,
  • 沈宜钊 ,
  • 李建国 ,
  • 高艳霞 ,
  • 王美美
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  • 1. 河北农业大学动物科技学院, 保定 071001;
    2. 河北天和肉牛养殖有限公司, 石家庄 050200;
    3. 保定市畜牧工作站, 保定 071051
孙雪丽(1992-),女,河北保定人,硕士研究生,从事反刍动物营养与饲料研究。E-mail:1277512374@qq.com

收稿日期: 2020-02-03

  网络出版日期: 2020-07-15

基金资助

国家现代农业产业技术体系（CARS-37）；河北省二期现代农业产业技术体系肉牛创新团队高效养殖岗位建设项目（HBCT2018130202）

收起

Effects of N-Carbamylglutamate on Nitrogen Metabolism of Holstein Bulls

  • SUN Xueli ,
  • LI Qiufeng ,
  • CAO Yufeng ,
  • LI Shujing ,
  • ZHANG Xiujiang ,
  • SHEN Yizhao ,
  • LI Jianguo ,
  • GAO Yanxia ,
  • WANG Meimei
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  • 1. College of Animal Science and Technology, Hebei Agricultural University, Baoding 071001, China;
    2. Hebei Tianhe Beef Cattle Breeding Co., Ltd., Shijiazhuang 050200, China;
    3. Animal Husbandry Workstation of Baoding, Baoding 071051, China

Received date: 2020-02-03

  Online published: 2020-07-15

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摘要

本试验旨在研究饲粮中添加不同水平N-氨甲酰谷氨酸（NCG）对荷斯坦奶公牛氮代谢的影响。选择45头健康的荷斯坦奶公牛[初始体重为（478.00±13.66）kg，12~13月龄]，随机分成3组，每组15头，分别添加0（对照组）、15、25 g/d的NCG。预试期7 d，正试期90 d。结果表明：1）与对照组相比，饲粮中添加15与25 g/d的NCG显著提高血浆中精氨酸的含量（P<0.05），分别提高了14.05%、8.30%。2）与对照组相比，饲粮中添加15 g/d的NCG显著降低血清中尿素氮含量（P<0.05）。3）饲粮中添加NCG对可消化有机物质的采食量以及尿中尿囊素、尿酸、嘌呤衍生物排出量无显著影响（P>0.05）。4）与对照组相比，饲粮中添加15 g/d的NCG显著提高奶公牛氮沉积、净蛋白质利用率与蛋白质生物学价值（P<0.05）。由此可见，在本试验条件下，饲粮中添加15 g/d NCG时，荷斯坦奶公牛氮沉积、净蛋白质利用率和蛋白质的生物学价值较为理想。

关键词： N-氨甲酰谷氨酸; 荷斯坦奶公牛; 氮代谢; 嘌呤衍生物

本文引用格式

孙雪丽 , 李秋凤 , 曹玉凤 , 李树静 , 张秀江 , 沈宜钊 , 李建国 , 高艳霞 , 王美美 . N-氨甲酰谷氨酸对荷斯坦奶公牛氮代谢的影响[J]. 动物营养学报, 2020 , 32(7) : 3224 -3233 . DOI: 10.3969/j.issn.1006-267x.2020.07.032

Abstract

This experiment was conducted to investigate the effects of dietary supplementation of N-carbamylglutamate (NCG) in different levels on nitrogen metabolism of Holstein bulls. Forty-five healthy Holstein bulls[initial body weight of (478.00±13.66) kg, 12 to 13 months of age] were randomly assigned into three groups with 15 replicates in each group, and were fed diets supplemented with 0 (control), 15 and 25 g/d of NCG, respectively. Adaptation period was 7 days and test period was 90 days. The results showed as follows:1) compared with control group, adding 15, 25 g/d NCG significantly increased the plasma content of arginine by 14.05% and 8.30% (P<0.05). 2) Adding 15 g/d NCG significantly decreased the content of serum urea nitrogen compared with control group (P<0.05). 3) Adding NCG had no significant effect on digestible organic matter intake, the contents of allantoin, uric acid and purine derivatives excreted in urine (P>0.05). 4) Compared with control group, adding 15 g/d NCG significantly increased nitrogen retention, nitrogen protein utilization and protein biological value (P<0.05). It is concluded that under the conditions of this experiment, when the NCG supplemental level is 15 g/d, the nitrogen retention, nitrogen protein utilization and protein biological value of the Holstein bulls are optimal.

Key words： N-carbamylglutamate; Holstein bulls; nitrogen metabolism; purine derivatives

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