抗菌肽制剂对芦花鸡胸肌肉质性状、游离氨基酸及微量元素含量的影响

Effects of Antibacterial Peptide Agent on Meat Quality,Contents of Free Amino Acids and Microelements in Breast Muscle of Barred Plymouth Rock Chickens

本文旨在探讨抗菌肽制剂对芦花鸡胸肌肉质性状、游离氨基酸及微量元素含量的影响。试验采用单因子设计方案,选取1日龄健康芦花鸡450只,随机分为3组,每组3个重复,每个重复50只鸡(公母各占1/2)。Ⅰ组(对照组)饲喂基础饲粮,Ⅱ、Ⅲ组分别饲喂在基础饲粮中添加抗菌肽及抗菌肽+酵母菌制剂的试验饲粮,试验期90 d。结果表明:1)Ⅱ、Ⅲ组芦花鸡胸肌滴水损失较Ⅰ组有降低趋势,但差异不显著(P>0.05),肌纤维直径均较Ⅰ组极显著降低(P<0.01)。Ⅱ组肌纤维密度较Ⅰ组显著提高(P<0.05),Ⅲ组较Ⅰ组极显著提高(P<0.01)。2)Ⅱ、Ⅲ组胸肌必需氨基酸含量和游离氨基酸总量与对照组无显著差异(P>0.05)。3)Ⅱ、Ⅲ组胸肌硒含量均较Ⅰ组有极显著的提高(P<0.01),Ⅲ组亦显著提高了锰含量(P<0.05),对其他微量元素含量无显著影响(P>0.05)。综上所述,抗菌肽+酵母菌制剂对芦花鸡胸肌肉质性状、游离氨基酸及微量元素含量的作用效果较好,且优于单独使用抗菌肽。

This study was conducted to investigate the effects of antibacterial peptide agent(ABPA) on meat quality,contents of free amino acids and microelements in breast muscle of barred plymouth rock chickens.Using a single factor design,a total of 450 one-day-old barred plymouth rock chickens were randomly allocated to 3 groups with 3 replicates per group and 50 chickens(half male and half female) in each replicate.The experiment lasted for 90 days.Chickens in group Ⅰ(control group) were fed a basal diet,and the other chickens in groups Ⅱ and Ⅲ were fed with the basal diet supplemented with antibacterial peptide(ABP) and antibacterial peptides plus yeast(ABPY),respectively.The results showed as follows: 1) compared with the control group,drip loss in groups Ⅱ and Ⅲ had a decrease tendency,but there was no significant difference(P>0.05).The muscle fiber diameter in groups Ⅱ and Ⅲ was significantly lower than that in control group(P<0.01).The muscle fiber density in groups Ⅱ and Ⅲ was significantly higher than that in control group(P<0.05,P<0.01).2) The contents of essential amino acids and total free amino acids in breast muscle in groups Ⅱ and Ⅲ had no significant difference compared with the control group(P>0.05).3) The selenium content in groups Ⅱ and Ⅲ was significantly higher than that in the control group(P<0.01),and the manganese content in group Ⅲ was significantly higher than that in the control group(P<0.05),but the other microelement contents in groups Ⅱ and Ⅲ had no significant difference compared with the control group(P>0.05).In summary,ABPA has positive effects on meat quality,contents of free amino acids and microelements in breast muscle of barred plymouth rock chicken,and the use of ABPA is better than the using ABP alone.