RESEARCH PAPER

Effects of Lactobacillus on Growth Performance, Slaughter Performance, Meat Quality and Protein Metabolism of Sunit Sheep

  • WANG Hongdi ,
  • DOU Lu ,
  • WANG Bohui ,
  • YANG Le ,
  • WANG Weihao ,
  • GUAN Haitian ,
  • DUAN Yan ,
  • Hasigaowa ,
  • JIN Ye
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  • 1. College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010010, China;
    2. Ordos Inspection and Testing Center, Ordos 017000, China;
    3. Bureau of Agriculture, Animal Husbandry and Science and Technology of Ulat Middle Banner, Ulat Middle Banner 015300, China

Received date: 2021-12-26

  Online published: 2022-07-14

Abstract

This experiment was conducted to investigate the effects of Lactobacillus on growth performance, slaughter performance, meat quality and protein metabolism of Sunit sheep. Fourteen 3-month-old Sunit sheep were randomly assigned to control group (fed a basal diet) and Lactobacillus group (fed the basal diet+2 g/head Lactobacillus, and the Lactobacillus active bacteria count was 1.5×109 CFU/g), each group had 7 sheep. The pre-experiment lasted for 7 days, and the experiment lasted for 90 days. The results showed as follows:1) the average daily weight gain, carcass weight, loin eye area and slaughter rate of Lactobacillus group were significantly higher than those of the control group (P<0.05). 2) The biceps femoral muscle pH24 h and yellowness (b*) value of Lactobacillus group were significantly higher than those of the control group (P<0.05), and the biceps femoral muscle cooking loss and shear force were significantly lower than that of the control group (P<0.05). 3) The serum albumin and total protein contents, as well as glutamic pyruvic transaminase and alkaline phosphatase activities of Lactobacillus group were significantly higher than those of the control group (P<0.05), and the serum urea nitrogen content was significantly lower than that of the control group (P<0.05). 4) The contents of crude protein, threonine, leucine, lysine, aspartic acid, glutamate, histidine, glycine, essential amino acids, delicious amino acids and total amino acids in biceps femoral muscle of Lactobacillus group were significantly higher than those of the control group (P<0.05). 5) The mRNA relative expression levels of protein kinase B (Akt), mammalian target of rapamycin (mTOR) and p70 ribosomal protein S6 kinase 1 (p70S6K1) in biceps femoral muscle of Lactobacillus group were significantly higher than those of the control group (P<0.05), and the mRNA relative expression levels of atrophy gene-1 (Atrogin-1) and muscle ring-finger protein 1 (MuRF1) in biceps femoral muscle were significantly lower than those of the control group (P<0.05). In summary, the addition of Lactobacillus to the diet has positive effects on the protein anabolism of Sunit sheep, increase the biceps femoral muscle protein and amino acids contents, and improve the growth performance, slaughter performance and meat quality.

Cite this article

WANG Hongdi , DOU Lu , WANG Bohui , YANG Le , WANG Weihao , GUAN Haitian , DUAN Yan , Hasigaowa , JIN Ye . Effects of Lactobacillus on Growth Performance, Slaughter Performance, Meat Quality and Protein Metabolism of Sunit Sheep[J]. Chinese Journal of Animal Nutrition, 2022 , 34(7) : 4598 -4609 . DOI: 10.3969/j.issn.1006-267x.2022.07.048

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