The experiment was conducted to study the effects of dietary PQQ on performance, egg quality and antioxidant function of laying hens. Three hundred and seventy-eight healthy Hy-line laying hens of 50 week-old were randomly divided into 7 groups with 6 replicates per group and 9 hens per replicate. All the hens were fed basal diets supplemented with 0, 0.005, 0.010, 0.020, 0.040, 0.080, and 0.160 mg/(d·hen) PQQ, respectively. The experiment lasted for 6 weeks. The result showed that laying rate and egg quality of laying hens had a tendency to increase in the PQQ supplemental groups, and dietary PQQ increased albumen height and Haugh unit, but there was no significant difference among the 7 groups (P>0.05); the activities of GSH-Px and T-SOD in serum and livers of laying hens was significantly increased （P<0.05）; the abilities of inhibiting superoxide anion and the hydroxyl radical were significantly increased （P<0.05）; the content of MDA in serum and livers was significantly decreased compared with that in the control group （P<0.05）. In conclusion, the supplementation of PQQ in the diet has the trend to increase the laying rate and egg quality in laying hens, and it can enhance the antioxidant function. The best level of PQQ is 0.010 mg/(d·hen).［Chinese Journal of Animal Nutrition, 2011, 23（8）：1370 -1377］
XU Lei,ZHANG Haijun,WU Shugeng,YUE Hongyuan,QI Guanghai,SUN Linlin
. Effect of Dietary PQQ on Performance, Egg Quality and Antioxidant Function of Laying Hens
[J]. Chinese Journal of Animal Nutrition, 2011
, 23(08)
: 1370
-1377
.
DOI: 10.3969/j.issn.1006-267x.2011.08.016
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