不同钙采食水平下生长犬肠钙吸收研究

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。

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

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%.