標準的な搾乳システムセンサーを使用した運用過剰搾乳時間の推定のための2つの実践的なフィールド方法の評価
Alice Uí Chearbhaill1,2, Pablo Silva Boloña1, Eoin G Ryan2
1Teagasc, Animal & Grassland Research and Innovation Centre, Moorepark, Fermoy, P61 C997 Cork, Ireland.
Animals : an open access journal from MDPI
|January 28, 2026
まとめ
運用過剰搾乳時間を測定する方法間のばらつきは大きいです。後部乳房はばらつきが少なく、前部乳房はばらつきが多かったため、乳牛の研究における測定方法の明確な報告の必要性が強調されました。
科学分野:
- 乳牛科学
- 畜産学
- 搾乳技術
背景:
- 運用過剰搾乳、すなわち搾乳後の真空暴露期間は、乳牛の乳房の健康にとって重要な要因です。
- 過剰搾乳時間を正確に定量化することは、研究および管理に不可欠ですが、方法にはばらつきがあります。
研究 の 目的:
- 運用過剰搾乳時間を評価するための真空変動パターン(VaDia™)と乳房流量曲線との間の方法間のばらつきを定量化すること。
- このばらつきに影響を与える牛および搾乳要因を特定すること。
主な方法:
- 自動クラスター除去(ACR)閾値が異なるVaDia™真空データおよび乳房流量曲線から得られた運用過剰搾乳時間を比較しました。
- 7つの乳房の組み合わせを分析し、期間の絶対差(ADOD)に影響を与える要因を特定するために多変量モデリングを使用しました。
主要な成果:
- すべての乳房の組み合わせで、方法間の有意なばらつきが観察されました。
- 乳房流量曲線法と比較して、VaDia™の推定値は、より長い過剰搾乳時間とより高い初期乳流量をもたらしました。
- 後部乳房の組み合わせはADODが最も低く、前部乳房の組み合わせはADODが最も高くなりました。
- より長い低/高流量時間、増加した産乳量、特定の真空レベル、より広い乳頭径、および高い経産牛数は、ADODの増加と関連していました。
結論:
- 真空ベースの方法と乳房流量ベースの方法は、搾乳終了プロセスの異なる側面を捉えます。
- 乳牛の研究および実務において運用過剰搾乳時間を報告する際には、測定方法(真空または流量)の明確な指定が不可欠です。
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