日粮添加维生素D_3对肉鸡生产性能、屠宰性能、免疫功能和肌肉品质的影响

Effect of dietary VD_3 on production performance,slaughter performance,immune function and meat quality of broilers

选取健康、体质量无差异的1日龄艾维茵(Avian)肉仔鸡200只,随机均分成2组,公母混雏。对照组饲喂玉米-豆粕型基础日粮,试验组饲喂添加维生素D3(2 000 IU·kg-1)的日粮,预饲期2周,正试期4周,研究日粮中添加维生素D3对肉鸡生产性能、屠宰性能、免疫功能和肌肉品质的影响。日粮中添加维生素D3对肉鸡生产性能的影响差异不显著(P>0.05),第4周的料重比与对照组相比提高了30.80%(P>0.05);日粮中添加维生素D3对全净膛率、半净膛率和屠宰率的影响差异不显著(P>0.05),腹脂率减少23.83%,与对照组差异显著(P<0.05);日粮中添加维生素D3,心脏、肝脏重量,脾脏指数,法氏囊指数比对照组分别提高了10.93%,21.09%,27.05%和46.15%,但差异不显著(P>0.05)。该试验日粮中添加维生素D3对肉鸡肌肉品质的影响差异不显著(P>0.05)。

To evaluate the effect of dietary supplementation vitamin D3 on growth performance, slaughter perform- ance, immune function and meat quality of broilers, 200 one-day-old Avian broiler chicks were randomly divided into two treatments with five replicates of 20 chicks. The chicks in the control group were fed with a corn-soybean basal diet and the chicks in the experimental group were fed with a corn-soybean basal diet supplemented with vitamin D3 （ 2 000 IU. kg -1i ）. The trial period was 42 days, including 2 weeks of preliminary feeding period and 4 weeks of trial period. The results showed that there was no significant difference in broiler production performance between the con- trol chicks and experimental chicks（ P 〉 0. 05 ）. In comparison with the control group, dietary vitamin D3 supplemen- tation had no effect on slaughter weight, semi-eviscerated weight, and eviscerated weight ; the ratio of feed to weight increased by 30. 80% in the fourth week （P 〉0. 05） ; the abdominal fat percentage was decreased by 23.83% （P 〈0. 05）. Moreover, the heart weight, liver weight, spleen index and bursa fabricius index in the experimental group were increased by 10. 93% , 21.09% , 27. 05% and 46. 15% , respectively, compared with the control one, but there was no significant difference between two treatments （ P 〉 0. 05 ）. Dietary vitamin D3 supplementation had no effect on meat quality of broilers.