Abstract: Objective\ To study the intestinal absorption for calcium and phosphorous in high dietary levels of calcium by growing laboratory beagal dogs.Methods\ Digestive test was employed.Results\ Calcium excretion in feces improved obviously,Apparent calcium degistibility gradually decreased and daily intestinal absorption for calcium increased when dietary calcium level increased from 1.2% to 2.4%.Phosphorous excretion in feces improved obviously and Apparent phosphorous degistibility and daily intestinal absorption for phosphorous decreased significantly.Conclusions\ Dogs have the ability of regulating intestinal absorption for calcium by changing calcium excretion in feces.High calcium consuption reduce the intestinal absorption for phosphorous

Key words: Dogs, High dietary calcium level, Calcium and phosphorous absorption

摘要： 目的　研究日粮高钙含量时 ,实验比格犬对钙磷肠吸收的影响。方法　消化试验。结果　当日粮含钙量从1 2 %提高到 2 4 %时 ,粪钙排泻量明显增加 (P <0 0 5 ) ,钙表观消化率逐渐降低 ,肠钙吸收量增加。随日粮钙含量提高 ,粪磷排泻量明显增加 (P <0 0 5 ) ,磷表观消化率和肠磷吸收量明显下降 (P <0 0 5 )。结论　犬主要通过改变肠钙排泄量来调节机体对钙的吸收 ,此外 ,高钙抑制消化道对磷的吸收

关键词: 犬, 高钙, 钙磷吸收