复合益生菌对灵山肉鸡生长性能、屠宰性能和肉品质的影响

Effects of Compound Probiotics on Growth Performance,Slaughter Performance and Meat Quality of Lingshan Broilers

为研究复合益生菌对灵山肉鸡生长性能、屠宰性能和肉质方面的影响,试验挑选85日龄体重约1.5 kg健康的灵山肉鸡120只,随机分为3个组,每组40只,分为5个重复。对照组只饲喂基础日粮,第1、2组在基础日粮上分别添加2、3 mL复合益生菌,饲养期60 d。测定添加不同组试验鸡生长性能、屠宰性能、肉质性状、脂肪代谢指标、氨基酸含量等指标。结果表明:1~60 d的饲喂周期中,复合益生菌对灵山肉鸡的生长性能无显著影响(P>0.05);与对照组相比,第1组的50 d全净膛率、40 d胸肌率、呈味氨基酸水平显著增加(P<0.05);50 d时,第1、2组的腹脂率显著降低(P<0.05);第1、2组胸肌脂肪含量显著降低(P<0.05);第1、2组的血清总胆固醇、血清三酰甘油含量下降,但差异不显著(P>0.05)。综上所述,饲料中添加复合益生菌制剂可以提高灵山肉鸡的全净膛率和胸肌率,增加呈味氨基酸水平,降低脂肪含量,改善灵山肉鸡肉质,提高鸡肉风味,以每只鸡添加量2 mL/d效果最好。

This experiment aims to study the effects of compound probiotics on growth performance,slaughter performance and meat quality of Lingshan broilers.Total of 12085-day-old healthy Lingshan broilers weighing about 1.5 kg were randomly divided into three groups,fourty in each group were divided into five replicates.The control group was only fed with the basic diet,and the firstand second groups were fed respectively with 2 mL,3 mL compound probiotics in the basic diet,for 60 days.The growth performance,slaughtering performance,meat quality traits,fat metabolism,amino acid content and other indicators of different groups of experimental broilers were measured.The results showed that the compound probiotics had no significant effect on the growth performance of Lingshan broilers during the feeding period of 60 days(P>0.05);compared with the control group,the 50 d total clean bore rate,40 d chest muscle rate and flavor amino acid level in group 1 were significantly increased(P<0.05);at 50 days,the rate of abdominal fat in groups 1 and 2 was significantly decreased(P<0.05);the content of breast muscle fat in groups 1 and 2 was significantly decreased(P<0.05);the contents of total cholesterol and triglyceride of groups 1 and 2 decreased,but the difference was not significant(P>0.05).To sum up,adding compound probiotics preparation in feed can improve the rate of clean breast and breast muscle,increase the level of flavor amino acids,reduce fat content,improve the meat quality of Lingshan broilers,and improve the flavor of broiler.The effect of adding 2 mL of compound probioticsdaily to the diet for one bird is best.