中文摘要：

试验将240只1日龄AA肉公鸡，按体重随机分为5个处理，分别饲喂基础饲粮和添加100mg／kg和200mg／kg硫酸锰（MnSO4）和氨基酸锰（MnAA）的饲粮42d。结果表明：添加100mg／kg锰显著降低4～6周耗料增重比（F／G）（P〈O．06）；添加100mg／kg和200mg／kg锰显著增加肝脏锰含量（P〈0．001），同时有提高腿肌率，降低腹脂率的趋势（P〉o．10）；添加100mg／kgMnAA血清总蛋白（TP）显著高于添加100mg／kgMnSO。（P〈0．09）。而添加100mg／kgMnAA和MnSO4组碱性磷酸酶（ALP）活性分别较对照组高35．7％和21．0％。表明添加100mg／kg锰可降低肉鸡生长后期F／G和提高肝脏锰含量，但是2种锰源间差异不显著；但Mn添加100mg／kgMnAA比MnSO4可能更有效地促进肉鸡体内蛋白质的合成代谢。

英文摘要：

In the experiment the total of 240 one-day-old Arbor Acres male broilers were randomly allotted into 5 groups. They were fed the basal diet and corn-soybean meal-based diet supplemented with 100,200 mg/kg MnSO4 or MnAA for 42 days. The result showed that supplementing 100 mg/kg Mn treatment significantly decreased 4-6 weeks F/ G （P 〈 0.06）.Supplementing 100 and 200mg/kg Mn treatment significantly increased Mn concentration of liver （P 〈 0.001）, at the same time had the trend to enhance the Percentage of thigh muscle and reduce Percentage of abdominal fat. Supplementing 100mg/kg MnAA had significantly made TP of serum higher compared to supplementing MnSO4（P 〈 0.09）. Adding 100 mg/kg MnAA and MnSO4 treatments comparing to the control increased ALP by 35.7% and 21.0% respectively （P 〉 0.10）.The result indicate that adding 100mg/kg Mn decreased 22-42 days F/G, and increased Mn concentration of liver, but there was not significant difference between the two Mn sources; and the addition of 100mg/kg Mn as MnAA might promote the protein suythesis in broilers more effectively than that of 100mg/kg Mn as MnSO4.