畜牧兽医学报 ›› 2025, Vol. 56 ›› Issue (10): 5039-5049.doi: 10.11843/j.issn.0366-6964.2025.10.024

• 营养与饲料 • 上一篇    下一篇

哺乳期滩羔羊添加维生素A对生长性能及肉品质的影响

郑梦馨1,2(), 陈晓东1,*(), 张腱皓1,2, 张桂杰1,2   

  1. 1. 宁夏大学动物科技学院,银川 750021
    2. 宁夏草牧业工程技术研究中心,银川 750021
  • 收稿日期:2024-11-11 出版日期:2025-10-23 发布日期:2025-11-01
  • 通讯作者: 陈晓东 E-mail:zhengmx79@163.com;isxiaodong@163.com
  • 作者简介:郑梦馨(1998-),女,宁夏银川人,硕士生,主要从事动物营养与饲料科学研究,E-mail: zhengmx79@163.com
  • 基金资助:
    国家自然科学基金项目(31960672);宁夏自治区重点研发项目(2021BBF02034)

Effects of Vitamin A Supplementation in Lactating Tan Lambs on Growth Performance and Meat Quality

ZHENG Mengxin1,2(), CHEN Xiaodong1,*(), ZHANG Jianhao1,2, ZHANG Guijie1,2   

  1. 1. School of Animal Science and Technology, Ningxia University, Yinchuan 750021, China
    2. Ningxia Grassland and Animal Husbandry Engineering Technology Research Center, Yinchuan 750021, China
  • Received:2024-11-11 Online:2025-10-23 Published:2025-11-01
  • Contact: CHEN Xiaodong E-mail:zhengmx79@163.com;isxiaodong@163.com

摘要:

旨在探究在滩羔羊哺乳期添加维生素A对生长性能、脂肪沉积、肌肉抗氧化能力及肉品质的影响。试验选取健康新生滩羔羊45只,体重(4.38±0.23)kg,随机分成3组,每组3个重复,每个重复5只羔羊。对照组(CON组)正常哺乳;试验组包括低剂量组和高剂量组,在正常哺乳同时,低剂量组(L组)在1日龄及1月龄灌服维生素A 30 000 IU,高剂量组(H组)在1日龄及1月龄灌服维生素A 60 000 IU。所有羔羊在第70天断奶,随后饲喂基础饲粮育肥120 d。结果显示,与CON组相比,1)L组和H组滩羊育肥期第1、30和60天体重显著提高(P<0.05),平均日增重无显著差异(P>0.05)。2)L组滩羊背最长肌过氧化氢酶含量显著提高(P<0.05)。L组和H组背最长肌大理石纹评分、a45 min*和pH24 h显著提高(P<0.05),肌内脂肪含量有提高趋势(0.05<P<0.10),肌肉剪切力显著降低(P<0.05)。3)L组和H组滩羊肌内脂肪沉积相关基因ZFP423、WNT10B、FABP4、ACACA表达量显著提高(P<0.05)。综上,哺乳期滩羔羊添加适量维生素A可提高其育肥期的生长性能,增加肌内脂肪含量,提高背最长肌的抗氧化能力,改善肉品质。

关键词: 哺乳期, 肌内脂肪沉积, 维生素A, 育肥期, 滩羊

Abstract:

This study aimed to investigate the effects of vitamin A supplementation during lactation in Tan lambs on production performance, fat deposition, muscle antioxidant capacity and meat quality. Forty-five healthy Tan lambs with body weight (4.38±0.23) kg were randomly divided into three groups of three replicates of five lambs each. The control group (CON group) was given normal milk intake, and the experimental groups were received 30 000 IU vitamin A (L group) and 60 000 IU vitamin A (H group) on the 1st day and the 1st month of age. All sheep were weaned on 70th day. After that, all animals were fed a basal diet for a fatten period of 120 days. The results indicated that: Compared with the control group, 1) the body weight of Tan lambs in groups L and H on the 1st day, 30th day and 60th day during the fattening period were significantly increased (P < 0.05), average daily gain was not significantly different (P>0.05). 2) Muscle catalase content of Tan lambs in L group was significantly increased (P < 0.05). Marbling score, meat color a45 min* and the pH at 24 h after slaughter were significantly increased (P < 0.05), intramuscular fat content tended to increase (0.05 < P < 0.1), and the muscle shear force was significantly decreased (P < 0.05). 3) The expressions of genes related to adipose deposition such as ZFP423, WNT10B, FABP4 and ACACA in the muscle of Tan lambs in groups L and H were significantly unregulated (P < 0.05). In conclusion, supplementing moderate amounts of vitamin A to lactating Tan lambs affects production performance during the fattening period, enhances content of intramuscular fat, improves the antioxidant capacity of the longest dorsal muscle, as well as enhances meat quality.

Key words: lactation period, intramuscular fat deposition, vitamin A, fattening period, Tan sheep

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