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The experiment aimed to explore the effects of autumn supplementary feeding on the serum biochemical indexes of Oula sheep at different age stages. A total of 24 healthy and similar-conditioned Oula ewes at the ages of 6, 12, and 36 months were selected for each age group. The Oula sheep at each age stage were randomly divided into a grazing group (group 1) and a grazing + supplementary feeding group (group 1), with three replicates in each group and four sheep in each replicate. The pre-feeding period was 10 days and the formal experimental period was 60 days. The results showed that the average daily weight gain of the group ii was higher than that of the group i for 6-month-old and 12-month-old sheep ( P<0.05). In 6-month-old sheep of the group i, the serum E2 and GH levels were higher than those in the group i ( P<0.05). In 12-month-old and 36-month-old sheep of the group i, the ALP activity was higher than that in the group i( P<0.05). In 6-month-old sheep of the group i, the serum GLB level was higher than that in the group i( P<0.05). In 12-month-old sheep of the group, the IL-2 level was higher than that in the group ( P<0.05). In 36-month-old sheep of the group, the levels of GLB, IgM, IL-4, and IL-6 were higher than those in the group ( P<0.05). In 6-month-old sheep of the group, the serum GSH-Px activity was higher than that in the group ( P<0.05). In 12-month-old and 36-month-old sheep of the group, the SOD activity was higher than that in the group ( P<0.05). The study suggests that autumn supplementary feeding promotes the rapid maturation of 6-month-old ewes, enhances the growth, metabolic capacity, immune function, and antioxidant ability at different age in Oula sheep. [ABSTRACT FROM AUTHOR]

The experiment was conducted to study the effect of compound plant essential oils on the production performance and egg quality of laying hens. A total of 13 664 Dawu Jinfeng laying hens with similar body weight and late laying period (362~368 days of age ) were randomly divided into two groups, a control group and a compound plant essential oil group, with four replicates in each group and 1 708 laying hens in each replicate. The laying hens in the control group were fed a basal diet, and the laying hens in the compound plant essential oils group were fed a basal diet supplemented with compound plant essential oils. The trial period was 14 days. The results showed that compared with the control group, the laying rate of laying hens in the compound plant essential oils group was significantly increased (P<0.05), the average egg weight showed an increasing trend (P>0.05), the sand shell egg rate was significantly decreased (P<0.05), and the feed to egg ratio was decreased (P>0.05). Compared with the control group, the egg yolk ratio of the compound plant essential oils group was significantly decreased (P<0.05), and the eggshell intensity had a rising trend. The egg yolk color, hardness, and wetness in the compound plant essential oils group were significantly increased (P<0.05). The study indicates that adding compound plant essential oils to the diet can increase the production performance and egg quality of laying hens. [ABSTRACT FROM AUTHOR]