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%.