Effect of Se sources and concentrations on performance, antioxidant defense, and functional egg quality of laying Japane
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RESEARCH ARTICLE
Effect of Se sources and concentrations on performance, antioxidant defense, and functional egg quality of laying Japanese quail (Coturnix japonica) Eldsokey Nassef 1
&
Osama Saker 2 & Mustafa Shukry 3
Received: 16 October 2019 / Accepted: 22 June 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The study aimed to investigate the effect of Se sources and concentrations on performance, thyroid activity, antioxidant defense, and functional egg quality of Japanese quail. One hundred and twenty, 8-week-old birds were randomly assigned to 1 of 4 dietary treatments in 3 replicates (10 birds/replicate). The treatments contained inorganic sodium selenite (SS) at 0.2 mg/kg diet (SS1 = control) or 0.4 mg/kg diet (SS2) or selenomethionine (SM) at 0.2 mg/kg diet (SM1) or 0.4 mg/kg diet (SM2). Egg production (%) and feed intake were daily recorded, and feed conversion ratio (FCR) was calculated. Blood samples were collected and analyzed for glucose, thyroxine (T4), triiodothyronine (T3), glutathione peroxidase (GPX), and superoxide dismutase (SOD) enzymes. Egg quality was determined in terms of Se content and concentrations of triglycerides, LDL, HDL, and cholesterol. Dietary supplementation of SM2 increased (P < 0.05) egg production (%) and egg mass and decreased FCR compared to the other groups, which showed no significant differences (P > 0.05) in between. It is the first study reporting that the eggs from the quail fed SM2 diet had lower concentrations (P < 0.05) of triglycerides, LDL, and cholesterol than those fed SS. Feeding SM increased (P < 0.05) blood glucose, T4, and T3 levels. Moreover, feeding SM increased the activity of GPX and SOD with a higher significance (P < 0.05) for SM2 than SM1. In conclusion, no adverse effects from supplementation of SM up to 0.4 mg/kg were observed and could improve their performance, antioxidant defense, thyroid activity, and functional egg quality. Keywords Selenomethionine . Performance . Egg quality . Antioxidant activity . Thyroid activity . Japanese quail
Introduction Avian eggs are a valuable component of the human diet due to their availability and nutritional characteristics. Recently, the eggs are used to be a carrier for an essential nutrient for the human being (Pan et al. 2011) such as selenomethionine (SM). However, the cholesterol content limits the Responsible Editor: Mohamed M. Abdel-Daim * Eldsokey Nassef [email protected] 1
Department of Nutrition and Clinical Nutrition, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh 33516, Egypt
2
Department of Biochemistry, Nutritional Deficiency Diseases, and Toxicology, Animal Health Research Institute, Agriculture Research Council (ARC), Kafrelsheikh, Egypt
3
Department of Physiology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh 33516, Egypt
consumption of eggs because it increases the risk of coronary heart disease (Domingo 2014). L-selenomethionine is a metabolite naturally synthesized and abundant in plants grown in soi
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