Effects of Postbiotic and Organic Selenium supplementation on Immunity, Antioxidant Status and Cost economics in Heat-Stressed Broiler chicken.
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Authors
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Raju sagi
PVNRTVU, Hyderabad
https://orcid.org/0009-0001-8194-2205
Abstract
Heat stress is a major constraint to broiler productivity, impairing immunity, antioxidant status and overall performance. The present study evaluated the individual and combined effects of a Saccharomyces cerevisiae–derived postbiotic and organic selenium on humoral immunity, serum biochemical profile, antioxidant enzymes, cortisol and cost economics in broiler chickens reared during summer conditions. A total of 288 day-old broiler chicks (45.13 ± 3 g) were randomly allotted to six dietary treatments with eight replicates of six birds each for 35 days: T1 (basal diet), T2 (basal diet + 0.3 mg organic selenium/kg), T3 (basal diet + 500 mg postbiotic/kg), T4 (basal diet + 1000 mg postbiotic/kg), T5 (basal diet + 0.3 mg organic selenium + 500 mg postbiotic/kg) and T6 (basal diet + 0.3 mg organic selenium + 1000 mg postbiotic/kg). Humoral immunity was assessed by Newcastle disease hemagglutination inhibition titres, while serum biochemical parameters (total protein, albumin, globulin, AG ratio and cholesterol levels, antioxidant indices (Glutathione peroxidase, Glutathione reductase, Superoxide dismutase, Malonidialdehyde) and cortisol were evaluated on days 21 and 35.Dietary supplementation significantly (P < 0.05) enhanced ND antibody titres, increased serum total protein and albumin, reduced cholesterol levels, improved antioxidant enzyme activities, decreased lipid peroxidation and lowered cortisol levels compared with the control. Combined supplementation (T5 and T6) produced the most pronounced improvements. Economic analysis revealed higher net profit per bird in supplemented groups, with the greatest return observed in T6, followed by T5.In conclusion, dietary inclusion of postbiotic and organic selenium, particularly in combination, effectively improved immune response, antioxidant status, stress resilience and profitability in broiler chickens during heat stress, indicating their potential as practical nutritional strategies for enhancing productivity during hot climatic conditions.
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