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完全押出飼料:摂取適応中に馬の糞便微生物叢はどのように変化するか?
Bruna Caroline Franzan1, Irene da Silva Coelho2, Emilly Martins Ramos1
1Animal Science Institute, Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brazil.
Animal science journal = Nihon chikusan Gakkaiho
|January 8, 2026
まとめ
馬に完全押出飼料(CED)を与えると、糞便細菌とinvitro発酵が変化します。粗飼料を除去すると微生物の多様性が低下し、食事への依存性と馬の腸の健康のための粗飼料の重要性が示唆されました。
科学分野:
- 馬科学
- 微生物学
- 動物栄養学
背景:
- 馬の腸内微生物叢は、消化と全体的な健康に重要な役割を果たしています。
- 食事の変化は、馬の糞便細菌群集の組成と機能に大きな影響を与えます。
- 完全押出飼料(CED)は濃縮された栄養源を提供しますが、馬の腸への影響についてはさらなる調査が必要です。
研究 の 目的:
- 馬の完全押出飼料(CED)への移行における糞便細菌群集の適応を調査すること。
- 馬の糞便微生物叢のinvitro発酵能力を評価すること。
- 食事中の粗飼料、CEDの含有量、および糞便微生物の多様性と安定性の関係を決定すること。
主な方法:
- 12頭の去勢馬に最初にコースクロスヘイを与え、その後28日間かけて、ヘイのみ(HAY)またはCEDの増加レベル(30%、60%、100%)のいずれかに移行させました。
- 微生物叢解析(細菌群集組成)およびinvitro発酵アッセイのために毎週糞便サンプルを採取しました。
- 食事療法に対する特定の細菌門の相対存在量と全体的な微生物多様性の変化を分析しました。
主要な成果:
- CED摂取により、Fibrobacteres、Proteobacteria、Campilobacterota、Lentisphaerae、SR1の相対存在量が減少しました。
- CED給餌でVerrucomicrobiaとSynergistetesの存在量が増加しました。
- 粗飼料が完全に除去されるまで、糞便細菌の多様性は60%のCEDまで維持されましたが、著しく減少し、粗飼料の重要性が強調されました。
結論:
- 馬の糞便微生物叢の組成は食事に大きく依存します。
- 馬の糞便微生物の多様性の安定性は、CED摂取よりも食事中の粗飼料の存在により強く関連しています。
- CEDの組み込みは微生物の存在量を変化させ、invitro発酵活性を変化させる可能性のある細菌群に影響を与え、後腸の機能に影響を与えます。
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