Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj 1167-31587, Iran.
Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj 1167-31587, Iran.
Poult Sci. 2022 Oct;101(10):101908. doi: 10.1016/j.psj.2022.101908. Epub 2022 Apr 7.
Fertility has a great impact on economic outcome in poultry sector. However, several physiological stressors such as aging adversely affected fertilization capacity and hatching quantity and quality. This study investigated the effect of dietary supplementation of different sources and levels of inorganic and organic selenium on the semen quality and reproductive performance of aged broiler breeder roosters. A total of thirty-six 50-wk-old Ross 308 roosters were randomly allocated to 6 groups and fed with different levels of organic and inorganic selenium. Treatments were included in the basal diet (control: CG), dietary supplementation of 0.15 (SeY0.15), 0.30 (SeY0.30), and 0.45 (SeY0.45) mg/kg selenium-enriched yeast (SeY), dietary supplementation of 0.30 mg/kg commercial organic selenium (Selemax), and dietary supplementation of 0.30 mg/kg sodium selenite (SS) as an inorganic source during 12 consecutive weeks. Ejaculated volume, semen quality attributes of the collected semen samples were evaluated every week. To assess fertility, hatchability and the hatched chick quality, the semen samples collected during last 2 wk of the trial were used to artificial insemination of hens. In order to measure seminiferous tube diameter and seminiferous epithelium thickness, testicular histology was also performed at the end of the experiment. Sperm motility, plasma membrane functionality and integrity, and ejaculation volume were higher in the SeY0.45 group compared to the other groups (P < 0.05). Fertility and hatchability rate as well as seminiferous epithelium thickness and seminiferous tube diameter were improved in the SeY0.45 compared with CG, SeY0.15 and SS groups (P < 0.05). Also hatchelling quality from roosters with SeY0.45 was higher than CG and SS groups (P < 0.05). No significant differences were noted in embryonic mortality between groups (P > 0.05). In conclusion, dietary supplementation of 0.45 mg SeY improved sperm quality and reproductive performance of aged broiler breeder roosters.
生育能力对家禽业的经济成果有很大的影响。然而，一些生理应激因素，如衰老，会对受精能力和孵化数量及质量产生不利影响。本研究调查了日粮中添加不同来源和水平的无机和有机硒对老龄肉种公鸡精液质量和繁殖性能的影响。将 36 只 50 周龄的罗斯 308 公鸡随机分配到 6 组，并饲喂不同水平的有机和无机硒。处理组包括基础日粮（对照组，CG）、0.15mg/kg 富硒酵母（SeY）（SeY0.15）、0.30mg/kg SeY（SeY0.30）、0.45mg/kg SeY（SeY0.45）、0.30mg/kg 商业有机硒（Selemax）、0.30mg/kg 亚硒酸钠（SS）作为无机硒源，连续 12 周。每周评估采集精液样本的射精量和精液质量属性。为了评估受精率、孵化率和孵化小鸡的质量，在试验的最后 2 周采集精液样本用于人工授精母鸡。为了测量曲细精管直径和曲细精管上皮厚度，在试验结束时还进行了睾丸组织学检查。与其他组相比，SeY0.45 组的精子活力、质膜功能和完整性以及射精量更高（P＜0.05）。与 CG、SeY0.15 和 SS 组相比，SeY0.45 组的受精率和孵化率以及曲细精管上皮厚度和曲细精管直径均有所提高（P＜0.05）。来自 SeY0.45 组的小鸡孵化质量也高于 CG 和 SS 组（P＜0.05）。各组胚胎死亡率无显著差异（P＞0.05）。综上所述，日粮中添加 0.45mg SeY 可提高老龄肉种公鸡的精子质量和繁殖性能。
