低能日粮中添加高剂量复合酶对肉鸡血清激素含量和微生物菌群的影响

Effect of low energy diet supplemented with complex enzyme on serum hormones concentration and microbial community of broilers

试验研究了在低能日粮中,添加不同剂量复合酶对肉鸡血液指标和微生物菌群的影响。试验将320只1日龄AA+肉鸡分为4组,每组8个重复,每个重复10只。第Ⅰ组为正对照组,饲喂常规饲粮;第Ⅱ组为负对照组,配方中增加了杂粕和麦类原料的用量,同时降低ME210 kJ/kg;第Ⅲ组和第Ⅳ组为常规剂量加酶组和高剂量加酶组,即分别在负对照组饲粮的基础上添加0.02%和0.2%复合酶,试验期为42 d。结果表明,负对照组甲状腺素显著低于其它3组(P<0.05);高剂量加酶组胰岛素含量显著高于其它3组(P<0.05);肉鸡其它各血清激素含量在4种不同日粮处理组之间未见显著性差异(P>0.05)。不同剂量的复合酶制剂对肉鸡空肠中大肠杆菌数没有显著性影响(P>0.05),两个加酶组乳酸杆菌数显著高于两个对照组(P<0.05)。研究表明,饲粮中添加0.02%和0.2%复合酶对肉鸡血清激素含量和微生物菌群均具有很好的改善作用。

The experiment was conducted to invesligale the ell＇eel of low energy diets supple- menled with different dosage of compound enzyme on the serum hormones concentration and mirobial community of broilers. Three hundred and twenty broilers （1 day-old） were randomly as- signed to from Ireatments wilh eight replieales of len broilers each. The positive control （PC） treatment was fed a eorn-soyl）ean meal diet. The diet of negative control （NC） treatment was re- dm＇ed by ME 210 kJ/kg, and the content of miscellaneous meal and wheat was increased in this treatment. The conventional dose of enzyme（CI）E） and super dose of enzyme（Sl）E） treat- ment were respeclively fed the NC diet with dift^rent dosages of compound enzyme 0.02% and 0.2%. The trial lasted for 42 d. The resuhs showed that the thyroxine of hroilers fed the NC treatment was significantly lower than other three treatmenls（P〈0.05）： the insulin of broilers fed Ihe S1）E diet was significantly higher than the other three treatments（P〈0.05）. No significant differences were observed in the serum hormones concentration of broilers fed different diets（P〉0.05）.