飼料中のカルシウム含量が妊娠白ネズミのカルシウム, リンおよびマグネシウム代謝におよぼす影響

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書誌事項

タイトル別名
  • The Effect of Calcium Level of Diet on the Metabolism of Calcium, Phosphorus and Magnesium in Pregnant Rats
  • ニンシン シロネズミ ノ ムキシツ タイシャ
  • Part 1 Mineral Metabolism in Pregnant Rats
  • 第1報 妊娠白ネズミの無機質代謝

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説明

Metabolism of calcium, phosphorus and magnesium during pregnancy was investigated with 20 primigravida albino rats about 170g body weight of Wister Imamichi strain fed with diets containing Ca 0.534 and 1.077% respectively.<br>The animals were divided into four groups (A, B, C and D), and in the early period of pregnancy, A and B group were fed with low-Ca diet and C and D group were fed high-Ca diet. In the middle period, A and D group fed with low, and B and C group with high, then in the last period A and B fed with high, and C and D with low Ca diet.<br>In the early period, calcium retention increased with the amount of calcium intake, therefore the absorption and the utilization of calcium were better in high calcium groups. In the middle and last period, the absorption rate was decreased and the amount of calcium retention of group C was smaller than that of calcium requirement for growth of fetuses.<br>It seemed that the calcium need to fetuses was removed from the calcium stored in mother rat during the early period of pregnancy.<br>From these results, it is considered that high calcium feeding in the middle or in the last period of pregnancy have no effect on calcium utilization, therefore it is preferable to feed high calcium diet from the beginning of pregnancy.<br>Absorption and utilization of phosphorus in diet are affected by it Ca/P ratio, and the rats of high-Ca group utilized P better than that of the low-Ca group<br>Metabolism of magnesium resembles to that of phosphorus, and high Ca/Mg ratio in diet seems to have good effect on magnesium utilization.

収録刊行物

  • 栄養学雑誌

    栄養学雑誌 29 (3), 123-128, 1971

    特定非営利活動法人 日本栄養改善学会

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