Effect of dietary supplementation of pyrroloquinoline quinone disodium on growth performance, meat quality and antioxidative ability of broilers
LIU, Guo-qing | SUN, Guang-ming | LIAO, Xiu-dong | HUANG, Jian-zhong | GUO, Mei-jin | ZHANG, Li-yang | GUO, Yan-li | Lü, Lin | LUO, Xu-gang
This study was conducted to investigate the effect of dietary supplementation with pyrroloquinoline quinone (PQQ) in the form of PQQ disodium (PQQ▪Na₂) on the growth performance, carcass traits, meat quality and antioxidative ability of broilers. A total of 720 one-d-old Arbor Acres male broilers were randomly allocated to 1 of 6 treatments with 8 replicates of 15 birds per replicate in a completely randomized design. Birds were fed a PQQ▪Na₂-unsupplemented corn-soybean meal basal diet (control) or the basal diet supplemented with 0.1, 0.2, 0.3, 0.4 or 0.5 mg PQQ▪Na₂ kg⁻¹ for 42 d. Compared with the control chicks, the chicks fed the diets supplemented with PQQ▪Na₂ had lower (P<0.05) feed:gain (F/G) during the grower phase and drip losses of breast muscles on day 42. As supplemental PQQ▪Na₂ level increased, plasma total antioxidant capacity (T-AOC) on d 42, liver T-AOC on d 21 and heart T-AOC on d 21 and 42 increased linearly (P<0.05), but malondialdehyde concentrations in plasma, liver and heart on d 21 or 42 decreased linearly (P<0.001) or quadratically (P<0.005). The results from the present study indicate that dietary supplemental PQQ▪Na₂ can improve antioxidant ability and meat quality of broilers, and in general, it is implied that the optimal supplemental PQQ▪Na₂ level is 0.1 mg kg⁻¹ of diet for broilers from 1 to 42 d of age.
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