高濃度飼料を給与された搾乳後期のホルスタイン種牛におけるメタン排出量のモンテンシンによる低減
D Onan-Martinez1, M A T de Bari1, H Olmo1
1Department of Animal Sciences, University of Florida, Gainesville, FL 32611.
JDS communications
|February 25, 2026
まとめ
モンテンシン補給は、搾乳牛の腸内メタン排出量と産出量を大幅に低減した。この戦略は、牛からの温室効果ガス生成を抑制する実行可能な方法を提供する。
科学分野:
- 動物科学;環境科学;農業科学
背景:
- メタン(CH4)は、反芻によってウシから排出される主要な温室効果ガス(GHG)である。;モンテンシン補給のような腸内CH4排出量を抑制する戦略は、様々な結果をもたらしている。;メタン産出量および強度に対するモンテンシンの影響を理解することは、持続可能な畜産にとって重要である。
研究 の 目的:
- 搾乳牛における腸内CH4産出量および強度に対するモンテンシン補給の影響を評価すること。;モンテンシンがウシの腸内CH4生成を低減するという仮説を検証すること。
主な方法:
- 20頭の搾乳牛を用いた2 x 4週間のクロスオーバーデザインを採用した。;ウシには、対照(CON)食またはモンテンシン(MON)を毎日補給した食を与えた。;個々の乾物摂取量(DMI)、乳量、および腸内ガス排出量を、CalanゲートとGreenFeedシステムを使用して測定した。
主要な成果:
- モンテンシン補給は、乾物摂取量(DMI)またはエネルギー補正乳(ECM)産出量を有意に変化させなかった。;腸内メタン排出量は、モンテンシン群(207.1 g/日)で対照群(257.2 g/日)と比較して有意に減少した。;メタン産出量(g CH4/kg DMI)およびメタン強度(g CH4/kg ECM)も、モンテンシン処理によりそれぞれ有意な減少および減少傾向を示した。
結論:
- モンテンシンは、搾乳牛における日々の腸内CH4排出量およびメタン産出量を効果的に低減する。;本研究結果は、ウシからのCH4排出量を抑制する戦略としてのモンテンシンの使用を支持する。;最適なモンテンシン投与量および乳生産と排出量に対する長期的な影響に関するさらなる研究が期待される。
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