花生红衣对蛋鸡生产性能及蛋品质的影响.

The experiment aims to investigate the effects of peanut skin on the production performance, egg quality, and serum antioxidant indicators of laying hens. A total of 4 000 Hailan brown laying hens with similar body condition and egg production rate 56 week-old divided into two groups, with four replicates in each group and 500 laying hens in each replicate. The pretest lasted for 7 d and the formal test lasted for 45 d. The control group of laying hens were fed a basic diet, while the experimental group of laying hens were supplemented with 3% peanut skin to replace some of the raw materials in the basic diet. The results showed that at 45 d of the experiment, the egg laying rate of the experimental group was 1.40% higher than that of the control group. During the experimental period, the egg breaking rate of the experimental group showed a decreasing trend, and at the end of the experiment, it decreased by 1.01% compared to the control group (P<0.05). During the entire experimental period, the feed to egg ratio of the experimental group decreased slightly compared to the control group. During the experimental period, the egg quality was improved, and the egg yolk color of the experimental group was darker than that of the control group (P<0.05). At 45 d of the experiment, the Roche color level of the egg yolk was 2.22 color levels higher than that of the control group, an increase of 29.80% (P<0.05). The experimental group showed an increasing trend in eggshell thickness and eggshell strength. At the end of the test, the activity of T-SOD and GSH-Px in the serum of the test group were 13.68% and 6.83% higher than those of the control group respectively (P<0.05). The T-AOC and CAT activity of the experimental group were increased by 56.45% and 41.10% respectively compared to the control group (P<0.05). The MDA content in the serum of the experimental group decreased by 27.70% compared to the control group (P<0.05). Research shows that peanut skin can be added as a feed ingredient for laying hens, which can improve their production performance and egg quality. [ABSTRACT FROM AUTHOR]