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Effects of nano-selenium on performance, meat quality, immune function, oxidation resistance, and tissue selenium
1State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, People's Republic of China.
Poultry Science
|September 20, 2012
Summary
This study shows that supplementing broiler diets with nano-selenium (nano-Se) improved antioxidant capacity and immune markers, with optimal levels between 0.3-0.5 mg/kg. Higher doses did not enhance, and sometimes reduced, these beneficial effects.
Area of Science:
- Animal Nutrition and Feed Science
- Poultry Science
- Biochemistry and Molecular Biology
Background:
- Selenium is an essential trace element crucial for poultry health, impacting immune function and antioxidant defense.
- Nanoparticle forms of selenium, such as nano-selenium (nano-Se), offer potential for improved bioavailability and efficacy in animal diets.
- Understanding optimal nano-Se supplementation levels is vital for enhancing broiler performance and health without adverse effects.
Purpose of the Study:
- To evaluate the impact of dietary nano-selenium supplementation on broiler chicken performance, meat quality, immune function, and antioxidant status.
- To determine the effects of varying nano-Se levels on tissue selenium deposition in broilers.
- To identify the optimal supplementation range for nano-Se in broiler diets.
Main Methods:
- Five hundred forty Arbor Acres broilers were fed diets supplemented with 0.0, 0.3, 0.5, 1.0, or 2.0 mg/kg of nano-selenium.
- Growth performance, meat quality parameters, immune organ indices, and serum/tissue antioxidant markers were assessed.
- Statistical analysis was performed to determine the effects of nano-Se levels, including quadratic effects.
Main Results:
- No significant differences were observed in broiler performance, meat color, or immune organ indices across treatments.
- A significant quadratic effect of nano-Se was found on serum and liver antioxidant markers (glutathione peroxidase activity, free radical inhibition) and indicators of oxidative stress (malondialdehyde), with peak efficacy at 0.3 mg/kg.
- Liver and muscle selenium content increased with higher dietary nano-Se levels, indicating dose-dependent accumulation.
Conclusions:
- Dietary nano-selenium supplementation positively influences antioxidant capacity and immune response in broilers, particularly at levels of 0.3-0.5 mg/kg.
- Excessive nano-Se supplementation (e.g., 2.0 mg/kg) did not provide additional benefits and may lead to suboptimal outcomes for certain parameters.
- An optimal dietary supplementation range of 0.3-0.5 mg/kg nano-Se is recommended for broilers, with a maximum safe level not exceeding 1.0 mg/kg.
