低钙磷饲粮添加高剂量植酸酶对1～63日龄黄羽肉鸡生长性能及胫骨性能的影响

Effect of high dose phytase on growth performance and tibia performance of Yellow-feathered broilers aged from 1 to 63 days fed with low calcium phosphorus diet

试验旨在研究低钙磷饲粮添加高剂量植酸酶对1～63日龄黄羽肉鸡生长性能及胫骨性能的影响。选用1 080只1日龄岭南黄羽肉公雏,根据体重一致原则分为6个处理,每个处理6个重复,每个重复30只。试验期63 d。结果表明:①植酸酶的添加可显著提高体重、平均日增重(P<0.05);②添加植酸酶显著提高了胫骨骨密度(P<0.05);MP+4 000、LP+4 000组胫骨脱水脱脂重显著提高(P<0.05);MP+4 000组胫骨灰分含量、磷含量显著提高(P<0.05);植酸酶的添加对胫骨钙含量无显著影响(P>0.05)。综上所述,低钙磷饲粮添加高剂量植酸酶可提高1～63日龄黄羽肉鸡生长性能,改善胫骨性能。可考虑用4 000 FTU/kg植酸酶部分替代或者完全替代玉米-豆粕型饲粮中磷酸氢钙。

The aim of this experiment was to study the effects of high dose phytase on growth performance and tibia performance of Yellow-feathered broilers aged from 1 to 63 days fed with low calcium phosphorus diet.One thousand and eighty 1-day-old Lingnan Yellow-feathered male broilers were randomly assigned to six groups according body weight,each group consisted of six replicates with 30 broilers.The experiment lasted for 63 days.The results showed:①The addition of phytase significantly increased weight gain,average daily weight(P<0.05);②The addition of phytase significantly increased bone density of tibia(P<0.05);Dehydrated degreased weight of tibia significantly increased of MP+4 000 and LP+4 000 group(P<0.05);Ash content and phosphorus content of tibia significantly increased of MP+4 000 group(P<0.05);The addition of phytase had was no significantly effect on calcium content of tibia(P >0.05).In conclusion,high dose phytase adding to low calcium phosphorus diet can improve growth performance and tibia performance of Yellow-feathered broilers aged from 1 to 63 days.Considering that 4 000 FTU/kg phytase can be used to partially replace or completely replace the dicalcium phosphate in corn-soybean meal.