发酵茶饲料对产蛋后期蛋鸡生产性能和蛋品质的影响

Effects of fermented tea feed on performance and egg quality of laying hens in the late phase

将茶叶、豆粕、玉米混匀后经微生物发酵制得发酵茶饲料,为了研究发酵茶饲料对产蛋后期蛋鸡生产性能和蛋品质的影响,试验选取55周龄的新杨黑羽蛋鸡432只,随机分为3组,每组3个重复,每个重复48只。其中对照组饲喂基础日粮,试验组以5%、10%发酵茶饲料替代基础日粮进行饲喂,正试期8周。结果显示:饲喂2周后,产蛋率表现为10%茶饲料组>5%茶饲料组>对照组;平均蛋重则相反。饲喂3周后,料蛋比表现为对照组>10%茶饲料组>5%茶饲料组;相比于对照组,5%茶饲料组的产蛋率显著提高且料蛋比显著降低(P<0.05),10%茶饲料组的产蛋率显著提高且平均蛋重显著降低(P<0.05)。6周后,10%茶饲料组的蛋清浓蛋白比例显著低于对照组(P<0.05)。8周后,10%茶饲料组的蛋清浓蛋白比例显著低于5%茶饲料组,且稀蛋白比例显著高于其他两组(P<0.05);相比于对照组,5%、10%茶饲料组的蛋黄胆固醇及丙二醛含量显著降低(P<0.05),而超氧化物歧化酶活性显著升高(P<0.05)。综上,5%发酵茶饲料能够提高产蛋后期蛋鸡生产性能和蛋品质。

The aim of this study was to evaluate the effects of fermented tea feed on performance and egg quality of laying hens in the late phase.A total of 43255-week-old Xinyang black-feathered laying hens were randomly divided into 3 groups,with 3 replicates in each group and 48 in each replicate.Tea leaves,soybean meal and corn were mixed well to produce fermented tea feed through microbial fermentation.The control group was fed with a basal diet,and the experimental groups were fed with the basal diet supplemented with 5%,10%fermented tea,respectively.The trial period was 8 weeks.The results showed that,after 2 weeks of feeding,the laying rates from higher to lower were that of the 10%fermented tea group,that of the 5%fermented tea group,and that of the control group;The average egg weight was in the opposite order.After 3 weeks of the experimental feeding,the feed to egg ratios from higher to lower were that of the control group,that of the 10%fermented tea group,and that of the 5%fermented tea group.Compared with that of the control group,the laying rate was increased and the feed to egg ratio was decreased significantly in the 5%fermented tea group(P<005),and the laying rate was increased and the average egg weight was decreased significantly in the 10%fermented tea group(P<005).After 6 weeks of the trial,the thick albumen proportion in the 10%fermented tea group was significantly lower than that in the control group(P<005).After 8 weeks,the thick albumen proportion in the 10%fermented tea group was significantly lower than that in the 5%fermented tea group,and the thin albumen proportion was higher than that of the other two groups(P<005).Compared with those of the control group,the total cholesterol and malondialdehyde of the yolk in the 5%,10%fermented tea groups were significantly higher(P<005),while the superoxide dismutase activity was significantly higher(P<005).To sum up,5%fermented tea feed improved the performance and egg quality of laying hens in the late phase.