代谢有机酸对三黄鸡生长性能、屠宰性能及血清生化指标的影响简

选择5周龄健康、体重(367.9±4.53)g的三黄鸡（♂）224只，随机分成4个处理（Ⅰ、Ⅱ、Ⅲ、Ⅳ），每个处理4个重复，每个重复14只鸡。Ⅰ为对照组，饲喂基础日粮；Ⅱ、Ⅲ和Ⅳ为试验组，分别饲喂添加3.75‰、5.00‰和6.25‰代谢有机酸产品（以短链的酮酸和有机酸为主）的日粮。结果表明，与对照组相比，Ⅲ组平均日增重显著增加（P＜0.05），Ⅳ组料重比显著降低（P＜0.05）；各处理组对8周龄三黄鸡胸肌率、腿肌率和腹脂率均无显著影响（P＞0.05），但可提高血清总蛋白、白蛋白水平，降低谷丙转氨酶含量。提示，代谢有机酸产品可有效地提高三黄鸡平均日增重，降低料重比，并通过调节血清蛋白和酶的水平促进三黄鸡生长，其适宜添加浓度为5.00‰。

Effect of Metabolic Organic Acid on Growth Performance,Slaughter Performance and Serum Biochemical Indexes in Yellow-feathered Broilers

A total of 224 5-week-old healthy Yellow-feathered broilers with similar boby weight（367.9±4.53）g were randomly allocated into 4 groups (Ⅰ，Ⅱ，Ⅲ and Ⅳ) with 4 replicates per group and 14 broilers in each replicate. Group Ⅰ was the control group and fed the basal diet；Groups Ⅱ，Ⅲ，Ⅳ were experimental groups which fed the basal diets supplemented with 3.75‰，5.00‰ and 6.25‰ metabolic organic acids （based short-chain keto acid and organic)，respectively.The results showed that compared with the control group，the average daily gain of group Ⅲ was significantly increased (P＜0.05)，the feed-gain ratio of group Ⅳ was significantly decreased (P＜0.05). There were no significant effects on breast meat rate，leg meat rate and abdominal fat ratio in each group (P＞0.05)，however，it could improve serum total protein and albumin levels，reduce alanine aminotransferase content of 8-week-old broilers.Therefore，it could be seen that the product of metabolic organic acids could effectively improve the average daily gain，lower feed-gain ratio of broilers，and promote the growth of Yellow-feathered broilers by regulating the level of serum proteins and enzymes，its appropriate level of adding in diet was 5.00‰.