Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Positive effects of grazing on blood components and intestinal microbiota in growing horses

  • Ji Hyun Yoo (Subtropical Livestock Research Institute, National Institute of Animal Science, Rural Development Administration) ;
  • Jong An Lee (Subtropical Livestock Research Institute, National Institute of Animal Science, Rural Development Administration) ;
  • Jae Young Choi (Subtropical Livestock Research Institute, National Institute of Animal Science, Rural Development Administration) ;
  • Sang Min Shin (Subtropical Livestock Research Institute, National Institute of Animal Science, Rural Development Administration) ;
  • Moon Cheol Shin (Subtropical Livestock Research Institute, National Institute of Animal Science, Rural Development Administration) ;
  • Hyeon Ah Kim (Subtropical Livestock Research Institute, National Institute of Animal Science, Rural Development Administration) ;
  • Yong Jun Kang (Subtropical Livestock Research Institute, National Institute of Animal Science, Rural Development Administration) ;
  • Hee Chung Ji (Subtropical Livestock Research Institute, National Institute of Animal Science, Rural Development Administration) ;
  • In Cheol Cho (Subtropical Livestock Research Institute, National Institute of Animal Science, Rural Development Administration) ;
  • Byoung Chul Yang (Subtropical Livestock Research Institute, National Institute of Animal Science, Rural Development Administration)
  • Received : 2022.08.10
  • Accepted : 2022.11.25
  • Published : 2022.12.01
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Abstract

Production of high-quality horses is important to make the horse industry grow. Grazing during the growing period can be an important factor affecting the production of high-quality horses. The objective of this study was to determine the effects of grazing on growing horses by analyzing their blood components and intestinal microbiota. Twelve growing horses for evaluating blood components and ten growing horses for evaluating intestinal microbiota were raised for about seven months and separated by two treatments: grazing vs. stable. Complete blood count, blood chemistry, and creatine kinase levels were analyzed as blood components and a 16s rRNA gene sequence analysis was performed to analyze intestinal microbiota. Calcium ions tended to be lower in the group with grazing treatment. Alkaline phosphatase and creatine kinase tended to be higher in the group with grazing treatment. These results indicate that grazing can provide horses with more exercise than staying in stables. At the phylum level, Firmicutes/Bacteroidetes ratios in grazing and stable groups were 4.2 and 6.5, respectively. Because various studies have reported that a. high Firmicutes/Bacteroidetes ratio indicates obesity, the method of raising horses might affect their physical ability. At the species level, rates of Clostridium butyricum in grazing and stable groups were 3.2% and 13.1%, respectively. Some strains of C. butyricum can cause several diseases such as botulism. These results indicate that grazing can positively affect growing horses in terms of blood components and intestinal microbiota. Moreover, grazing can be helpful to make growing horses healthy through proper exercise.

Keywords

Acknowledgement

본 연구는 농촌진흥청 시험연구사업(연구개발과제명: 방목초지 일년생 사료작물 생산 기술 및 육성마 방목 효과에 관한 연구, 연구개발과제번호: PJ01486401)의 지원으로 수행되었습니다.

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