【摘要】 选用２００羽１日龄安纳克黄羽鸡，在玉米－糠麸－菜豆粕型日粮中分４个钙总磷比（１．０∶１，１．３∶１，１．６∶１，１．９∶１）添加植酸酶（４００ｐｕ），进行不同钙水平（即钙磷比）影响肉用仔鸡生长性能和钙磷利用效果的研究。结果显示，日粮在低钙水平，即钙磷比为（１．０～１．３）∶１时添加植酸酶，肉用仔鸡具有较高的增重速度和饲料利用率，并且钙、总磷、植酸磷和蛋白质表观消化率也较高更多还原

【Abstract】 Two hundreds of Anak chickens for day old were divided into four treatments,and fed with the corn wheat and rice bran rapeseed and soybean meal based diets containing supplemented microbial phytase (400 pu/kg) and four calcium to phosphorus ratios(1.0∶1,1.3∶1,1.6∶1,1.9∶1),respectively.Then,the effect of different levels of calcium on the growth performance and on metabolisms of calcium and phosphorus in broilers was evaluated.The lower Ca diet with phytase had more improvement on body weight gain,feed conversion rate,and aparent digestibilities of Ca,TP,P and protein for broilers than the higher Ca diet with phytase.Therefore adding phytase to a diet with the lower Ca may be more effective for broilers.更多还原