中国畜牧兽医2011，Vol.38Issue(5)：10-14,5.
玉米-豆粕型日粮中添加高剂量植酸酶对肉鸡养分利用率的影响
High Doses of Microbial Phytase Affect Nutrient Utilization in Broiler Chicks Fed Corn-soybean Meal Diets
摘要
Abstract
An experiment was conducted to determine the effect of high levels of microbial phytase supplementation in cornsoy-based diets on nutrient availability of broiler chickens. A totalof 576 one-day old male Arbor Acres broilers were assigned to 6 dietary treatments,consisting of 8 pens of 12 birds each,and were fed two periods experimental diets from 1 to 21 d and 22 to 42 d. The diets include a positive control (0.69％ tP,0. 45％ nonphytate P for 1 to 21 d;0.59％ tP,0.35％ nonphytate P for 22 to 42 d)and a negative control(0. 60％ tP,0. 35％ nonphytate P for 1 to 21 d;0.49％ tP,0. 25％ nonphytate P for 22 to 42 d),and 4 more negative diets with 500,2000,8000,32000 FTU/kg phytase. The results showed that ① High dose of phytase could significantly improve the availability of Ca at 17 to 21 d (P ＜0. 05 ). ②High dose of phytase could significantly influence the availability of P at 38 to 42 d (P＜0. 05 ) ,with the phytase levels increasing,the availability of P significantly decreased,while the availability of Ca tended to be increased then to be decreased. ③There were significantly improvements in availability of crude protein and AME with phytase levels increasing(P＜0. 05)either at 17 to 21 d or at 38 to 42 d. This study suggest that higher levels of phytase can be used to improve the overall utilization of phytate P and possibly other nutrients in a tP-deficient diet. That current phytase supplementation and diet nutrients within the poultry industry may need to be reevaluated.关键词
高水平/植酸酶/肉鸡/能量/蛋白质/养分利用率Key words
high levels/ phytase/ broiler/ energy/ protein/ nutrient availability分类
农业科技引用本文复制引用
孙宏选,高秀华,杨禄良..玉米-豆粕型日粮中添加高剂量植酸酶对肉鸡养分利用率的影响[J].中国畜牧兽医,2011,38(5):10-14,5.基金项目
天津市农业科技成果转化与推广项目--绿色饲料添加剂基因工程酶规模化生产与示范. （）
