Hydroxy-selenomethionine enhances the productivity and egg quality of 50- to 70-week-old semi-heavy laying hens under heat stress.

Autor:	de Brito ANEF; Federal University of Paraiba (UFPB), 58397-000, Areia, PB, Brazil., Kaneko IN; Federal University of Paraiba (UFPB), 58397-000, Areia, PB, Brazil., Cavalcante DT; Federal University of Paraiba (UFPB), 58397-000, Areia, PB, Brazil., Cardoso AS; Federal University of the Semi-Arid Region (UFERSA), 59625-000, Mossoro, RN, Brazil., Fagundes NS; Adisseo Brazil Animal Nutrition, 05804-900, Sao Paulo, SP, Brazil., Fontinhas-Netto G; Adisseo Brazil Animal Nutrition, 05804-900, Sao Paulo, SP, Brazil., de Lima MR; Federal University of the Semi-Arid Region (UFERSA), 59625-000, Mossoro, RN, Brazil. Electronic address: mrlmatheus@ufersa.edu.br., da Silva JHV; Federal University of Paraiba (UFPB), 58397-000, Areia, PB, Brazil., Givisiez PEN; Federal University of Paraiba (UFPB), 58397-000, Areia, PB, Brazil., Costa FGP; Federal University of Paraiba (UFPB), 58397-000, Areia, PB, Brazil.
Jazyk:	angličtina
Zdroj:	Poultry science [Poult Sci] 2023 Feb; Vol. 102 (2), pp. 102320. Date of Electronic Publication: 2022 Nov 05.
DOI:	10.1016/j.psj.2022.102320
Abstrakt:	Oxidative stress significantly compromises the production efficiency of laying hens. It has been reported in literature that selenium (Se) in poultry diets has a positive effect on mitigating these effects. This study has been carried out to evaluate the effects of Se supplementation in feeds, from either an inorganic or a hydroxy-selenomethionine (OH-SeMet) source, on the performance and physiological traits of 50- to 70-wk-old Dekalb Brown laying hens under heat stress, and on their egg quality after different storage durations. The treatments consisted in supplementing 0.3 ppm of Se as sodium selenite (SS; 45%-0.7g/ton) or OH-SeMet (2%-15g/ton) in twelve 16-bird replicates. Supplementation with OH-SeMet resulted in a better performance of the laying hens than with SS: -5% feed conversion ratio and +3.6% of egg mass. A reduction in egg quality was observed with prolonged egg storage, which was mitigated with the use of OH-SeMet in laying hen diets. The use of OH-SeMet increased the antioxidant capacity of the birds, which showed higher glutathione peroxidase levels in the blood, kidneys, liver, and intestinal mucosa, in addition to a higher Se content in the eggs and a greater bone resistance. Thus, supplementing feeds with 0.3 ppm of OH-SeMet to 50- to 70-wk-old semi-heavy laying hens enhances their antioxidant capacity and leads to a higher egg quality and productivity than SS supplementation. Competing Interests: DISCLOSURES Naiara Simarro Fagundes and Garros Fontinhas-Netto are employees of Adisseo. The other authors have no conflicts of interest to declare. (Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
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