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

Content Provider	Europe PMC
Author	de Brito, Anna Neusa Eduarda Ferreira Kaneko, Isabelle Naemi Cavalcante, Danilo Teixeira Cardoso, Anilma Sampaio Fagundes, Naiara Simarro Fontinhas-Netto, Garros de Lima, Matheus Ramalho da Silva, José Humberto Vilar Givisiez, Patrícia Emília Naves Costa, Fernando Guilherme Perazzo
Copyright Year	2022
Abstract	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.
ISSN	00325791
Volume Number	102
PubMed Central reference number	PMC9763846
Issue Number	2
PubMed reference number	36508950
Journal	Poultry Science [Poult. Sci]
e-ISSN	15253171
DOI	10.1016/j.psj.2022.102320
Language	English
Publisher	Elsevier
Publisher Date	2022-11-05
Access Restriction	Open
Rights License	This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). © 2022 The Authors
Subject Keyword	antioxidant system hydroxy-selenomethionine laying hens oxidative stress selenium
Content Type	Text
Resource Type	Article
Subject	Medicine Animal Science and Zoology