当前位置: X-MOL 学术J. Appl. Poult. Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Ammonia affects production performance and Toll-like receptor mRNA expression of laying ducks
Journal of Applied Poultry Research ( IF 1.9 ) Pub Date : 2020-03-31 , DOI: 10.1016/j.japr.2020.02.006
Z. Tao , C. Zhu , S. Zhang , W. Xu , Z. Shi , W. Song , H. Liu , H. Li

The objective of this study was to assess the effects of different concentrations of ammonia on laying performance and Toll-like receptor (TLR) and cytokine mRNA expression in Shanma ducks. The experiment is a 2 × 3 × 4 three-factor mixed experimental design. The feeding density is 18 ducks per 2.2 square meter (high density) and 12 ducks per 2.2 square meter (low density). The ammonia concentration is 10 ppm, 30 ppm, 50 ppm, and 75 ppm. The ammonia exposure time is 10 D, 20 D, and 30 D. Egg production was higher in ducks exposed to 10 ppm ammonia than in those exposed to 30, 50, or 75 ppm ammonia when they were housed at a density of 12 ducks per 2.2 square meter net. Body weight showed a downward trend as exposure time and ammonia concentrations increased, but there was no significant difference among ducks exposed to different ammonia concentrations for the same amount of time or among ducks exposed to the same ammonia concentration for different lengths of time. The expression of TLR4, TLR5, IL 4, and IL-8 mRNA was significantly lower in ducks exposed to 75 ppm ammonia. These results indicated that ammonia negatively affected duck body weight and egg laying and that TLR4 and TLR5 may be involved in regulating IL-4 and IL-8 during the anti-ammonia stress response in ducks.



中文翻译:

氨影响产蛋鸭的生产性能和Toll样受体mRNA表达

这项研究的目的是评估不同浓度的氨对产蛋性能和Toll样受体(TLR)的影响。)和山麻鸭细胞因子mRNA的表达。该实验是2×3×4三因素混合实验设计。饲养密度为每2.2平方米18只鸭子(高密度)和每2.2平方米12只鸭子(低密度)。氨浓度为10ppm,30ppm,50ppm和75ppm。氨暴露时间为10 D,20 D和30D。暴露于10 ppm氨水的鸭子的密度比暴露于30、50或75 ppm氨水的鸭子的密度高,而养鸭密度为每只12只鸭子净2.2平方米 随着暴露时间和氨浓度的增加,体重呈下降趋势,但是在相同时间暴露于不同氨浓度的鸭子之间或在不同时间暴露于相同氨浓度的鸭子之间,体重没有显着差异。在暴露于75 ppm氨水的鸭子中,TLR4,TLR5,IL 4和IL-8 mRNA的表达明显降低。这些结果表明氨对鸭的体重和产蛋有负面影响,并且TLR4和TLR5可能在鸭抗氨应激反应中参与调节IL-4和IL-8。

更新日期:2020-03-31
down
wechat
bug