反すう動物における窒素摂取量と飲水量の関係

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書誌事項

タイトル別名
  • Relationships between Nitrogen Intake and Water Intake in Ruminants
  • ハンスウ ドウブツ ニ オケル チッソ セッシュリョウ ト インスイリョウ ノ
  • In Special Reference to the Preventive Effect on the Incidence of Urolithiasis
  • とくに尿石症発生に対する影響との関連において

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抄録

It was suggested in the previous experiment that urea feeding seemed to be effective to prevent urolithiasis in ruminants on high concentrate ration. This effect seemed to be caused by the increased blood urea level followed by the increased urinary excretion of water, which increased water intake. In ruminants, dietary protein was also known to increase blood urea level. The investigations reported here were undertaken to compare the effect of urea feeding with that of protein feeding on water intake and some ruminal and serum nitrogen fractions in sheep. The average water intake per metabolic body size per day in urea-fed animals was almost similar to that in soy protein-fed animals and was 174ml and 176ml respectively. However, that in control animals which ingested the restricted amounts of nitrogen was considerably small and was 135ml per day. Among ruminal and serum nitrogen fractions determined, ruminal ammonia nitrogen and serum urea nitrogen levels showed significant differences (P<0.05 and/or P<0.01) among these three treatment lots. Ruminal ammonia nitrogen and serum urea nitrogen levels were remarkably higher in urea-fed and soy protein-fed animals. Therefore, the difference in serum urea nitrogen level among these three treatment lots seemed to have relation with the difference in the amounts of water intake by the animals. It was remarked that urea feeding did not have a peculiar preventive effect on the incidence of urolithiasis but feeding of high protein ration has a similar preventive effect to urea feeding.

収録刊行物

  • 日本畜産学会報

    日本畜産学会報 55 (4), 257-262, 1984

    公益社団法人 日本畜産学会

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