グリーンフィードと呼吸室で測定された二酸化炭素,酸素,メタンの交換と熱生成の比較
Ali-Reza Bayat1, Päivi Mäntysaari1, Tomasz Stefański1
1Animal Nutrition, Production Systems, Natural Resources Institute Finland (Luke), 31600 Jokioinen, Finland.
Journal of dairy science
|September 5, 2025
まとめ
グリーンフィードシステムはO2,CO2,CH4の交換と乳牛の熱生成を正確に測定し,エネルギー代謝と飼料効率に関する大規模な研究のために呼吸室の実行可能な代替案を提供します.
科学分野:
- 動物科学
- 栄養生理学
- 環境監視
背景:
- 乳牛のエネルギー代謝と飼料効率を理解するには,ガス交換と熱生成の正確な測定が不可欠です.
- 呼吸室 (RC) はゴールドスタンダードですが,大規模なアプリケーションを制限する資源密集です.
- グリーンフィード (GF) 排出量モニタリングシステムは,継続的な大規模測定のための潜在的な代替手段を提供します.
研究 の 目的:
- 乳牛のO2,CO2,CH4交換と熱生成 (HP) を測定するためのGreenFeed (GF) システムの精度と精度を評価する.
- 従来の呼吸室 (RC) とのGF測定を比較する
主な方法:
- 32匹の北欧赤牛でスイッチバック・デザインを用いて,GFユニットと4匹のRCを5週間にわたって比較した.
- GFとRCからデータを収集し,分析し,異常値が特定され,削除されました.
- 統計分析には,関係,バイアス,予測エラー (RMSPE,CCC) を評価するための混合モデル線形回帰が含まれていました.
主要な成果:
- O2,CO2,CH4交換,およびHPのGF測定はRC測定と同等であった.
- GFの測定では高重複率 (0. 82- 0. 88) が観察されました.
- すべてのパラメータに対して,GFとRCの間に強い相関関係 (R2 = 0. 79- 0. 89) と相関相関係数 (CCC = 0. 87- 0. 94) が発見され,O2,CO2,およびHPのバイアスは最小でした.
結論:
- グリーンフィードシステムは高い精度と正確性を示し,乳牛のガス交換と熱生成を測定するための呼吸室の代替として使用することを検証しています.
- これにより,牛のエネルギー代謝と飼料効率の大規模評価が容易になります.
- CH4測定におけるバイアスの可能性については,さらなる調査が必要である.
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