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Comparison of inorganic and organic selenium sources for broilers
1Department of Animal Sciences, Louisiana State University Agricultural Center, Baton Rouge, Louisiana 70803, USA.
Poultry Science
|June 24, 2005
Summary
Organic selenium (Se) supplementation increased tissue Se concentrations in broilers compared to inorganic sources. However, neither organic nor inorganic Se affected growth performance, carcass traits, or plasma glutathione peroxidase (pGPX3) activity.
Area of Science:
- Animal Nutrition
- Poultry Science
- Trace Minerals
Background:
- Selenium (Se) is an essential trace mineral crucial for antioxidant defense and overall health in broilers.
- Understanding the bioavailability and efficacy of different selenium sources, organic and inorganic, is vital for optimizing poultry diets.
Purpose of the Study:
- To compare the effects of organic (Se-enriched yeast, SY) and inorganic (sodium selenite, SS) selenium sources on broiler performance.
- To evaluate the impact of these selenium sources on carcass characteristics, tissue and plasma Se concentrations, and plasma glutathione peroxidase (pGPX3) activity.
Main Methods:
- Broilers were fed corn-soybean meal-based diets supplemented with 0, 0.30 ppm Se from SS or SY across three feeding phases over 49 days.
- Growth performance (daily gain, feed intake, gain:feed), carcass traits, breast and plasma Se, and pGPX3 activity were measured.
- Treatments were replicated with specific numbers of male and female broilers per replicate.
Main Results:
- Selenium supplementation, regardless of source, did not significantly affect daily gain, feed intake, gain:feed ratio, eviscerated weight, chill weight, carcass yield, breast weight, or breast moisture loss.
- Broilers fed diets supplemented with SY exhibited significantly higher muscle and plasma Se concentrations compared to those fed control or SS diets.
- Plasma GPX3 activity remained unaffected by the source or concentration of selenium supplementation.
Conclusions:
- Organic selenium supplementation effectively increases tissue and plasma selenium concentrations in broilers.
- Neither organic nor inorganic selenium sources significantly improved growth performance, carcass traits, or plasma glutathione peroxidase activity in this study.
- The findings suggest that while organic Se enhances tissue Se deposition, its impact on performance and antioxidant enzyme activity may be comparable to inorganic Se under these experimental conditions.