Abstract
The supplementation of Selenium-enriched probiotics is effective in reducing oxidative stress and maintaining meat quality stability in broiler chicken especially under heat stress. An experimental study was conducted to perform Comparative analysis of Selenium yeast with inorganic Se in broilers under heat stress. A total of 120 broilers chicks of one day were assigned to 4 groups each consisting 30 chicks fed on same basal diet but different selenium sources. The basal diet of group D1 was not supplemented with Se source (Negative control), group D2 basal diet was supplemented with inorganic selenium (Sodium selenite 0.22mg/Kg starter phase and 0.15mg/Kg finisher phase), group D3 basal diet was supplemented with commercially available organic selenium (Seleno-methionine 0.22mg/Kg starter phase and 0.15mg/Kg finisher phase) and group D4 basal diet was supplemented with self-developed organic selenium (Se-enriched yeast 0.22mg/Kg starter phase and 0.15mg/Kg finisher phase). The performance parameters i.e. feed intake (FI), live body weight (BW) and FCR were not significantly (p>0.05) effected by selenium supplementation in the starter phase but were significantly (p<0.05) effected in the finisher phase. Selenium supplementation significantly (p<0.05) effected serum Se level in different supplemented groups. Higher serum Se value (58.20±0.06) was recorded in D4 group. Similarly significantly lower selenium value was recorded for D4 and higher was recorded for D1 (11.36±0.08). However lower serum Paraoxonase (PON) value was recorded for D4 (13.24±0.01) and higher for D1 (13.33±0.03). Comparatively self-developed Se enriched yeast increased the Se accumulation and improved antioxidant system. Glutathione peroxidase (GPx) was found higher in D4 (12.333±0.03) followed by D3, D2 and D1 respectively. Whereas superoxide dismutase (SOD) was significantly lower (p<0.05) in D4 (0.1437±0.003) followed by D3 (0.1457±0.002). Selenium supplementation increased the bird's survival rate. Birds fed on Se enriched yeast showed higher Se deposition and better antioxidant capacity as compared to other sources of selenium. Se-enriched yeast displayed an improved result on Se deposition in tissues, and oxidative capacity, meat tenderness and immune response level as compared to other sources of selenium.
Highlights
Selenium is one of the utmost significant trace elements
The present study evaluate the supplementation potential of selenium enriched yeast on growth performance, serum biochemistry and antioxidant biomarker in muscles of broiler both in starter and finisher phases under summer stress
In the current study somewhat similar results have been observed for feed intake and body weight gain, organic selenium supplementation has an improved impact on the body weight gain
Summary
Selenium is one of the utmost significant trace elements. Irrespective of selenium high quantities toxicity, its deficiency is a global issue lead to adversely affect animals performance and efficiency, with more vulnerability to diseases (Malavolta and Mocchegiani, 2018). Selenium was considered primarily to be lethal for animals, but later it was reported to be essential for proper functioning of “glutathione peroxidase”, an antioxidant enzyme which eliminates free radicals from the body during normal metabolism (Heindl et al, 2010; Huang et al, 2019). It is vital in poultry diet in order to protect them from antioxidant stress as it is an important part of antioxidant enzymes. While the human activities and industrialization has caused increase of these heavy metals in the soil, food chain and water to drink, which is causing a number of diseases in animals, plants and human, the presence of selenium in food helped to detoxified the effects of heavy metal toxicity besides the other abiotic stress on living organisms (Zubair et al, 2016; Ishaque et al, 2020; Yousef et al, 2020)
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