复合益生菌对北京油鸡屠宰性能和肉品质的影响

为研究复合益生菌对北京油鸡屠宰性能和肉品质的影响,采用2×3两因子析因试验设计,选择648只1日龄北京油鸡雏鸡随机分为3个处理,分别为对照组(基础饲粮)、抗生素组(基础饲粮中添加50 g/t杆菌肽锌)和益生菌组(基础饲粮中添加由产朊假丝酵母菌、枯草芽孢杆菌、嗜酸乳杆菌复合而成的复合益生菌,育雏期添加0.5 kg/t,育成期添加0.7 kg/t)。每个处理公母各半,每个性别9个重复,每个重复12只鸡,试验期为16周。正试期的第16周,从每个处理组的每个性别各随机选取9只北京油鸡进行屠宰,测定屠宰性能和肉品质。结果表明:各处理组北京油鸡屠宰率、半净膛率、全净膛率、胸肌率、腿肌率和腹脂率均无显著差异(P>0.05),胸肌和腿肌pH、肉色、滴水损失率、蒸煮损失率和剪切力也均无显著差异(P>0.05),且处理和性别也没有表现出显著的交互作用(P>0.05)。但复合益生菌和杆菌肽锌组北京油鸡胸肌粗脂肪含量较对照组分别降低了36.67%和28.81%,粗蛋白质含量分别提高了1.78%和2.00%。

Effects of compound probiotics on slaughter performance and meat quality of Beijing You chicken

The purpose of this test was to study the effects of compound probiotics on slaughter performance and meat quality of Beijing You chicken.Using a 2×3 two-factor factorial test design,648 one-day-old Beijing You chicken were randomly divided into 3 treatments,namely a control group(basic diet),antibiotic group(basic diet supplemented with 50 g/t bacitracin zinc)and probiotic group(basic diet added with composite probiotics composed of Candida utilis,Bacillus subtilis,and Lactobacillus acidophilus,0.5 kg/t at brooding stage,0.7 kg/t at brooding stage).Each treatment owned half male,9 replicates in each sex,12 chickens in each replicat.The test period was 16 weeks.During the 16-th week,9 Beijing You chickens were randomly selected from each sex of each treatment group for slaughter,and the slaughter performance and meat quality were measured.The results showed that there were no significant differences in the slaughter rate,semi-clear rate,full-clear rate,pectoral muscle rate,leg muscle rate and abdominal fat rate of Beijing You chickens in each treatment group(P>0.05).There was no significant difference in pH,flesh color,drip loss rate,cooking loss rate and shear force(P>0.05),and there was no significant interaction between treatment and gender(P>0.05).However,compound probiotics and bacitracin zinc decreased 36.67%and 28.81%of crude fat content in the breast muscle of Beijing You chicken,and increased crude protein content by 1.78%and 2.00%,respectively.