动物营养学报 >

2019 , Vol. 31 >Issue 8: 3898 - 3904

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.08.052

研究简报 Short communications

过瘤胃蛋氨酸对奶山羊产奶性能和血清生化指标的影响

  • 李莉 ,
  • 张佩华 ,
  • 凌浩 ,
  • 陈东 ,
  • 文静 ,
  • 雷坤 ,
  • 刘明
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  • 1. 湖南农业大学动物科学技术学院, 长沙 410128;
    2. 湖南畜禽安全生产协同创新中心, 长沙 410128;
    3. 西北农林科技大学动物科技学院, 杨凌 712100;
    4. 城步羴牧牧业有限公司, 邵阳 422500
李莉(1992-),女,广东惠州人,硕士研究生,从事反刍动物动物营养学研究。E-mail:1132669514@qq.com

收稿日期: 2019-01-24

  网络出版日期: 2019-08-19

基金资助

湖南省重点研发计划项目（2016NK2171）

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Effects of Rumen Protected Methionine on Milk Performance and Serum Biochemical Indexes of Milk Goat

  • LI Li ,
  • ZHANG Peihua ,
  • LING Hao ,
  • CHEN Dong ,
  • WEN Jing ,
  • LEI Kun ,
  • LIU Ming
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  • 1. College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China;
    2. Hunan Co-Innovation Center of Animal Production Safety, Changsha 410128, China;
    3. College of Animal Science and Technology, Northwest Agriculture and Forestry University, Yangling 712100, China;
    4. Chengbu Shanmu Animal Husbandry Co., Ltd., Shaoyang 422500, China

Received date: 2019-01-24

  Online published: 2019-08-19

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摘要

本试验旨在研究在饲粮中添加不同保护方式的过瘤胃蛋氨酸对奶山羊产奶性能和血清生化指标的影响。采取完全随机试验设计，选取45只平均体重为（52.6±4.9）kg、胎次相近、泌乳日龄[（120±10）d]相近的关中奶山羊，随机分为3组，每组15只。对照组饲粮为不添加过瘤胃蛋氨酸的基础饲粮，试验Ⅰ组在基础饲粮基础上添加4.5 g/d过瘤胃蛋氨酸A（物理包被），试验Ⅱ组在基础饲粮基础上添加4.5 g/d过瘤胃蛋氨酸B（化学保护）。总试验期为39 d，其中预试期9 d，正试期30 d。结果表明：1）试验Ⅰ组、试验Ⅱ组的奶料比极显著高于对照组（P<0.01），2个试验组之间差异不显著（P>0.05）；试验Ⅰ组、试验Ⅱ组的产奶收益和毛收益均高于对照组（P>0.05）。2）试验Ⅰ组和试验Ⅱ组羊乳的乳脂率分别比对照组提高了6.75%和13.18%，但差异不显著（P>0.05）；试验Ⅱ组羊乳的乳蛋白率和非脂固形物含量均高于对照组，但差异不显著（P>0.05）。3）试验Ⅰ组、试验Ⅱ组的血清总胆固醇和尿素氮含量均低于对照组，但差异不显著（P>0.05）；试验Ⅰ组的血清免疫球蛋白G含量显著高于对照组和试验Ⅱ组（P<0.05）。综上所述，饲粮中添加不同保护方式（物理包被和化学保护）的过瘤胃蛋氨酸均能提高奶山羊经济效益，且添加物理包被的过瘤胃蛋氨酸可以提高机体的免疫力，添加化学保护的过瘤胃蛋氨酸可以提升羊乳的乳脂率和乳蛋白率。

关键词： 奶山羊; 过瘤胃蛋氨酸; 产奶性能; 血清生化指标

本文引用格式

李莉 , 张佩华 , 凌浩 , 陈东 , 文静 , 雷坤 , 刘明 . 过瘤胃蛋氨酸对奶山羊产奶性能和血清生化指标的影响[J]. 动物营养学报, 2019 , 31(8) : 3898 -3904 . DOI: 10.3969/j.issn.1006-267x.2019.08.052

Abstract

This experiment was conducted to the effects of adding different protective modes of rumen protected methionine in diets on milk performance and serum biochemical indexes of milk goat. A completely randomized trial design was adopted to select 45 Guanzhong milk goat with the body weight of (52.6±4.9) kg, similar parities and similar lactation age[(120±10) d], randomly divided into 3 groups, and 15 goats in each group. The diet of control group was a basal diet which did not add rumen methionine, the diet of trial Ⅰ group was added 4.5 g/d rumen methionine A (physical coating) based on the basal diet, and the diet of trial Ⅱ group was added 4.5 g/d rumen methionine B (chemical protection) based on the basal diet. The whole experiment lasted for 39 days including 9 days of pretrial period and 30 days of trial period. The results showed as follows:1) the milk to feed ratio of trial Ⅰ group and trial Ⅱ group was significantly higher than that of control group (P<0.01), but the difference between experimental groups was not significant (P>0.05); the milk income and gross returns of trial Ⅰ group and trial Ⅱ group were higher than control group (P>0.05). 2) The milk fat percentage in goat milk of trial Ⅰ group and trial Ⅱ group was 6.75% and 13.18% higher than that of control group, respectively, but the difference was not significant (P>0.05); the milk protein percentage and non-fat solids content in goat milk of trial Ⅰ group and trial Ⅱ group were higher than that of control group, however, the difference was not significant (P>0.05). 3) The contents of serum total cholesterol and urea nitrogen of trial Ⅰ group and trial Ⅱ group were lower than that of control group (P>0.05), and the serum immunoglobulin G content of trial Ⅰ group was significantly higher than that of control group and trial Ⅱ group (P<0.05). To sum up, adding different protective modes of rumen protected methionine (physical coating and chemical protection) can both improve the economic benefit of milk goat. Furthermore, adding rumen protected methionine coated by physical method can promote the body immunity of milk goat, and adding rumen protected methionine protected by chemical method can elevate the milk fat percentage and milk protein percentage of goat milk.

Key words： milk goat; rumen protected methionine; milk performance; serum biochemical indexes

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