トウモロコシの粒子の大きさを減らすことで,妊娠中の母豚のエネルギーと窒素の消化性が増加します
Gage E Nichols1, Caitlin E Evans1, Chad B Paulk1
1Department of Grain Science and Industry, College of Agriculture, Kansas State University, Manhattan, KS 66506, United States.
Translational animal science
|February 13, 2026
まとめ
妊娠中の母猪の食事でトウモロコシの粒子の大きさを減らすことで,栄養素の利用が著しく改善されました. 精細なトウモロコシ粒 (400μm) は,原始タンパク質とエネルギーの消化性を高め,母牛の代謝可能なエネルギーを高めました.
科学分野:
- 動物科学 動物科学
- 豚の栄養について
- 消化器官の生理学について
背景:
- 以前の研究によると,トウモロコシの粒子のサイズが小さくなると,豚の代謝可能なエネルギー (ME) の利用が向上します.
- 妊娠サウンの食事には,トウモロコシの粒子のサイズが栄養素の消化能力に与える影響に関する研究は限られています.
研究 の 目的:
- トウモロコシの粒子の大きさによる原蛋白 (CP) の消化能力,消化可能なエネルギー (DE),ME,および窒素調整された代謝可能なエネルギー (AMEn) に及ぼす影響を,妊娠中の母豚で調査する.
- 妊娠中の母猪の食事のために最適なトウモロコシ粒子の大きさを決定する.
主な方法:
- 妊娠中期の27頭の母牛は,400,800,または1200μmの幾何学的な平均直径のトウモロコシの粉末で食事を与えられました.
- 二酸化チタンは,消化性の計算のための消化不可能なマーカーとして使用されました.
- ダイエットは7日間食べられ,その後は分析のために2日間の採集期間が続きました.
主要な成果:
- CP,DE,ME,AMEnの表面的全経路消化能力 (ATTD) は,トウモロコシの粒子のサイズが減少するにつれて,線形的に (P < 0.001) 増加した.
- MEとAMEnは粒子のサイズが100μm減少するごとにそれぞれ178kcal/kg,172kcal/kg増加した.
- 微細なトウモロコシ粒子のサイズで栄養素利用の有意な改善が観察されました.
結論:
- トウモロコシの粒子の大きさを400μmに減らすことは,妊娠中の母豚の栄養素の消化能力とエネルギー利用に好影響を与える.
- 精細なトウモロコシの粒子の大きさは,妊娠中のブタの食事の栄養価を改善するのに有益です.
- さらなる研究により,特定の生産段階の粒子のサイズを最適化することができます.
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