Effects of Ruminal Administration of Mechanical Stimulating Brush on Rumination Time and on Ruminal Fluid Passage Rate in Holstein Steers Fed Concentrate and Rice Straw.

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  • 稲わら給与下のホルスタイン種去勢牛における第一胃刺激用具の投与が反すう時間および第一胃内液通過速度に及ぼす影響
  • 稲わら給与下のホルスタイン種去勢牛における第一胃刺激用具の投与が反芻時間および第一胃内液通過速度に及ぼす影響
  • イネワラキュウヨ カ ノ ホルスタインシュ キョセイギュウ ニ オケル ダイ1イ シゲキ ヨウグ ノ トウヨ ガ ハンスウジカン オヨビ ダイ1イ ナイエキ ツウカ ソクド ニ オヨボス エイキョウ

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The objectives of this study were to determine the effect of ruminal administration of mechanical stimulating brush (Rumen faibu : RF) on rumination time and on passage rate of rumen fluid in steers fed concentrate and rice straw. Eight animals were used. Four were orally administered three RF per head (RF treatment) and the other four were not administered (control). The organic cell wall (OCW) content of feeding diets was 25% (experiment 1) and 15% (experiment 2) as fed basis. The rice straw was cut 2cm and 30cm. All animals were fed enough concentrate and rice straw to gain 1.4kg/day in body weight. The rumination time and total chewing time per day were not affected by RF administration in each feeding condition. There was no difference in the turnover rate of rumen fluid between the control and the RF treatment in experiment 2. These results suggest that the physical stimulation of RF for the rumen was not functional even when OCW content of feeding diets was low at 15% and cut & cm.

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