哺乳期滩羔羊添加维生素A对生长性能及肉品质的影响

打开文本图片集

中图分类号：S826.5 文献标志码：A 文章编号：0366-6964（2025）10-5039-11

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 meatquality. 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 3O Ooo IU vitamin A （L group）and 6o ooo IU vitamin A（H group） on the lst day and the lst month of age. All sheep were weaned on 7Oth day. After that，allanimals 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 lst day，3Oth day and 6Oth 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 a45min* and the pH at 24h after slaughter were significantly increased （ ⋅P<0.05 ），intramuscular fat content tended to increase （0. 05

Keywords： lactation period; intramuscular fat deposition; vitamin A; fattening period; Tan sheep ∗ Corresponding author： CHEN Xiaodong，E-mail：isxiaodong@163. com

滩羊产业历来是宁夏优势特色产业，近年来，由于生态压力，滩羊饲养由传统放牧转为舍饲圈养，导致滩羊脂肪沉积过量，肉品质明显降低，对滩羊产业健康发展带来巨大挑战[1]。（剩余19077字）