饲粮中添加牛至精油对芦花鸡生长性能、屠宰性能、器官指数和肠道形态的影响

为研究饲粮中添加牛至精油对芦花鸡生长性能、屠宰性能、器官指数和肠道组织形态的影响,选取120只49日龄健康雌性芦花鸡,体重(1478.75±85.81)g,随机分为4组,每组3个重复,每个重复10只鸡,各组饲粮分别添加0(Q8组)、50(QO50组)、100(QO100组)和150(QO150组)mg·kg-1牛至精油...

Effects of dietary oregano essential oil on growth performance,slaughter performance,organ indexes and intestinal morphology of Luhua chickens

To investigate the effects of dietary supplementation with oregano essential oil on growth performance, slaughter performance, organ indexes and intestinal morphology of Luhua chickens.A total of 120 49-day-old female Luhua chickens body weight was (1 478.75±85.81) g] were randomly divided into 4 groups with 3 replicates per group and 10 chickens per replicate. Each group was fed diets supplemented with 0 (Q8 group), 50 (QO50 group), 100 (QO100 group) and 150 mg·kg^-1(QO150 group) oregano essential oil, respectively. The experiment lasted for 75 days.The results showed as follows: compared with Q8 group, addition of oregano essential oil had no significant effect on growth performance of Luhua chickens(P>0.05);Half-eviscerated weight, slaughter percentage, eviscerated percentage and bectoral muscle percentage of QO50 group and QO100 group were significantly increased (P<0.05),and there were linear and quadratic relationships between slaughter percentage, eviscerated percentage and oregano essential oil supplemental level(P<0.05) of QO100 group, half-eviscerated weight and pectoral muscle percentage showed a quadratic curve with the increase of oregano essential oil supplemental level; Glandular stomach index in QO50, QO100 and QO150 groups were increased by 21.05%, 21.05% and 26.32%, respectively (P<0.05),and had linear and quadratic relationship with oregano essential oil supplemental level (P<0.05);Ileal crypt depth in QO50 and QO100 groups was decreased by 6.07% and 6.43% (P<0.05), respectively; Jejunal crypt depth in QO100 and QO150 groups was decreased by 5.11% and 4.45% (P<0.05), respectively; Duodenal villus height in QO150 group was increased by 14.00% (P<0.05), and there were linear and quadratic relationships between jejunar crypt depth, duodena villus height and oregano essential oil supplemental level(P<0.05).In conclusion, adding 50 mg·kg^-1 oregano essential oil to dietary could significantly improve the slaughter performance,glandular stomach index and crypt depth in jejunum and ileum of Luhua chickens.