不同钙采食水平下生长犬肠钙吸收研究

Study of Intestinal Absorption for Calcium in Different Dietary Levels of Calcium by Growing Dogs

研究不同日粮钙含量 (0 5%～ 1 4% )时 ,实验比格犬肠钙的表观吸收和真吸收状况。结果表明 :当日粮钙含量从 0 8%提高到 1 4% ,肠钙吸收率呈明显下降趋势 ,但肠钙吸收量保持稳定 ;当日粮含钙量从 0 8%降至 0 5%时 ,肠钙吸收率基本稳定 ,但肠钙吸收量明显降低。此外钙磷比在 0 6～1 4∶1范围内 ,不影响肠钙的吸收。当日粮钙含量为 0 8%～ 1 4%时 ,各组实验犬体增重、血清钙和血清碱性磷酸酶水平没有显著差异。

The aim of the experiment was to study the appreant intestinal absorption and ture intestinal absorption for calcium by laboratory beagal dogs in different dietary levels of calcium(0 5%～1 4%).The results revealed that the calcium absorption efficiency decreased and the quantity of calcium absorption preserved invariable when dietary calcium level increased from 0 8% to 1 4%;inversely,the efficiency of calcium absorption maintained stable and the quantity of calcium absorption decreased when dietary calcium decreased from 0 8% to 0 5%.Intestinal absorption for calcium was not influenced when the ratio of Ca:P was in 0 6～1 4∶1. There were no significant differences in body weight gain,serum calcium level and serum AKP content among groups when the dietary calcium level was in 0 8%～1 4%.