title: Effect of dietary vanadium and vitamin C on egg quality and antioxidant status in laying hens.
abstract: This study assessed the effect of dietary vanadium (V) and vitamin C (VC) on production performance, egg quality and antioxidant status in laying hens. A total of 360 laying hens (31-week-old) were randomly allotted into a 3 × 3 factorial arrangement treatments (four replicates and 10 chicks per replicate) with three levels of dietary V (0, 5 and 10 mg/kg) and three levels of vitamin C (0, 50 and 100 mg/kg) for 12 weeks. The effect of V and VC did not alter egg production, egg weight, average daily feed intake and feed conversion ratio during 1-12 week. Albumen height and Haugh unit value were linearly decreased (p < 0.001) by addition of V, whereas the effect of 100 mg/kg VC was observed to counteract (p < 0.05) this effect in V-containing treatments during 1-12 week. Hens fed V-containing diet laid lighter (linear effect, p < 0.05) coloured eggs (higher lightness value, lower redness and yellowness value), and the VC exerted no influence on it during 1-12 week. The serum superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) activities, ability to inhibit hydroxyl radical, were significantly decreased, and the malondialdehyde (MDA) and V contents were increased (p < 0.05) by effect of V during 4, 8 and 12 week. The effect of VC alone and the interactive effect between VC and V were shown to increase serum (p < 0.05) SOD activity in 4 week and decrease MAD levels in 12 week. The result indicate that V decreased the egg quality and caused the oxidative stress at level of 5 mg/kg and 10 mg/kg, and the addition of 100 mg/kg vitamin C can alleviate its egg quality reduction effect and can mitigate the oxidative stress to some extent.
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Kechuang Feed Industry in Sichuan, Chengdu, Sichuan, China.
authors.forename: J P
authors.initials: JP
authors.lastname: Wang
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Kechuang Feed Industry in Sichuan, Chengdu, Sichuan, China.
authors.forename: K R
authors.initials: KR
authors.lastname: He
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Kechuang Feed Industry in Sichuan, Chengdu, Sichuan, China.
authors.forename: X M
authors.initials: XM
authors.lastname: Ding
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Kechuang Feed Industry in Sichuan, Chengdu, Sichuan, China.
authors.forename: Y H
authors.initials: YH
authors.lastname: Luo
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Kechuang Feed Industry in Sichuan, Chengdu, Sichuan, China.
authors.forename: S P
authors.initials: SP
authors.lastname: Bai
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Kechuang Feed Industry in Sichuan, Chengdu, Sichuan, China.
authors.forename: Q F
authors.initials: QF
authors.lastname: Zeng
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Kechuang Feed Industry in Sichuan, Chengdu, Sichuan, China.
authors.forename: Z W
authors.initials: ZW
authors.lastname: Su
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Kechuang Feed Industry in Sichuan, Chengdu, Sichuan, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Xuan
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Kechuang Feed Industry in Sichuan, Chengdu, Sichuan, China.
authors.forename: K Y
authors.initials: KY
authors.lastname: Zhang
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D001205:Ascorbic Acid / Q000494:pharmacology*; D002645:Chickens / Q000502:physiology*; D004032:Diet / Q000662:veterinary; D004531:Eggs / Q000592:standards*; D005260:Female; D014639:Vanadium / Q000494:pharmacology*
chemical_list: D000975:Antioxidants; D014639:Vanadium; D001205:Ascorbic Acid
keywords: antioxidative status; productive performance; vanadium; vitamin C