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1. At the end of the peak laying period for fowl, both performance and egg quality decrease markedly. Counteracting either or both of these could, therefore, have significant positive economic implications. Quercetin, a typical representative of the flavonol compounds, has a variety of biological functions. However, there are no reported findings on its use as a feed additive. 2. In this study, we investigated the effects of quercetin on laying rate, egg quality and blood traits associated with egg quality in laying hens (Hessain) during the late laying period and explored the possibility of using quercetin as a functional feed additive. 3. The laying hens (n = 240; 39 weeks old) were randomly assigned to 4 treatments consisting of 6 replicates (n = 10) and were fed with diets containing quercetin at 0, 0.2, 0.4 or 0.6 g/kg. 4. Results showed that laying rate was increased and feed-egg ratio was decreased significantly by 0.2 and 0.4 g/kg quercetin. Compared with controls, Haugh unit, eggshell strength, eggshell thickness and yolk protein were increased, but yolk cholesterol was decreased by quercetin. 5. In conclusion, quercetin was beneficial in improving performance and egg quality. The recommended concentration of quercetin is 0.4 g/kg of the basal diet. At this concentration, increased laying rate, improved egg quality and reduced yolk cholesterol can be expected.
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L-L Hu, and
X-A Feng, and
L Zhang, and
F Jin
February 2022,
Poultry science,
Y Liu, and
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H-N Liu, and
Y-L Suo, and
L-L Hu, and
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L Zhang, and
F Jin
January 2021,
Animal science journal = Nihon chikusan Gakkaiho,
Y Liu, and
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H-N Liu, and
Y-L Suo, and
L-L Hu, and
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October 2023,
Poultry science,
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June 2019,
Archives of animal nutrition,
Y Liu, and
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January 2020,
Animal science journal = Nihon chikusan Gakkaiho,
Y Liu, and
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October 2019,
Poultry science,
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November 2020,
Journal of animal physiology and animal nutrition,
Y Liu, and
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H-N Liu, and
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X-A Feng, and
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February 2023,
Poultry science,
Y Liu, and
Y Li, and
H-N Liu, and
Y-L Suo, and
L-L Hu, and
X-A Feng, and
L Zhang, and
F Jin
January 2017,
Anais da Academia Brasileira de Ciencias,
Y Liu, and
Y Li, and
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Y-L Suo, and
L-L Hu, and
X-A Feng, and
L Zhang, and
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November 2017,
Animal : an international journal of animal bioscience,
