Effects of dietary oil type and level on production performance and egg quality in laying ducks.

Abstract

This study investigated the effects of supplementing diets for Shan Partridge Ducks ( = 720) with 1%, 2%, or 4% beef tallow, coconut oil, or a 1:1 ratio of the two on production performance, egg quality, and serum biochemistry over 12 weeks. Compared with the control group, dietary supplementation with coconut oil, beef tallow, or mixed oil significantly improved laying rate and daily egg mass and reduced FCR, with the best overall performance at the 2% inclusion level. While most egg quality parameters remained stable, the egg shape index was reduced at the 4% inclusion level. Serum analysis revealed that coconut oil supplementation elevated total protein and total cholesterol levels, suggesting a distinct metabolic influence. However, no significant increase in the liver enzyme ALT indicated an absence of overt hepatic stress. A significant interaction was found between oil type and level for egg weight. Furthermore, all oil supplements preserved egg storage stability over 28 days. In conclusion, dietary supplementation with 1–2% beef tallow or a mixed oil is recommended to enhance productivity and economic efficiency in commercial duck egg production without compromising egg quality or metabolic health.