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Virginiamycin and broiler performance.

R D Miles, D M Janky, R H Harms

    Poultry Science
    |June 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Virginiamycin supplementation in broiler diets significantly improved body weight and feed efficiency. It also enhanced shank pigmentation, indicating better xanthophyll utilization without affecting mortality rates.

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    Area of Science:

    • Animal Science
    • Poultry Nutrition
    • Feed Additives

    Background:

    • Virginiamycin is an antibiotic growth promoter used in animal feed.
    • Optimizing broiler performance and carcass quality is crucial for the poultry industry.
    • Understanding the impact of feed additives on nutrient utilization and pigmentation is essential.

    Purpose of the Study:

    • To evaluate the effects of Virginiamycin supplementation on broiler performance.
    • To assess the impact of Virginiamycin on shank pigmentation in broilers.
    • To determine the optimal dosage of Virginiamycin for broiler growth and pigmentation.

    Main Methods:

    • Two controlled experiments were conducted with broiler chickens.
    • Dietary supplementation with varying levels of Virginiamycin (5, 10, and 20 ppm) was administered.

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  • Body weight, feed efficiency, shank pigmentation (colorimeter and Roche fan), and mortality were measured.

    • Main Results:

    • Virginiamycin supplementation at 10 ppm significantly increased body weights in both experiments.
    • Feed efficiency was significantly improved with 5 and 10 ppm Virginiamycin in Experiment 1.
    • Enhanced shank pigmentation was observed with Virginiamycin supplementation, suggesting improved xanthophyll utilization. No increased benefit was seen at 20 ppm compared to 10 ppm.
    • Mortality rates were not affected by the dietary treatments.

    Conclusions:

    • Virginiamycin supplementation is effective in improving broiler body weight and feed efficiency.
    • Virginiamycin positively influences shank pigmentation, likely due to enhanced xanthophyll utilization.
    • A supplementation level of 10 ppm Virginiamycin appears optimal for performance and pigmentation in broilers.