Tea polyphenols increase the antioxidant status of laying hens fed diets with different levels of ageing corn

作     者：Ling Zhou Xuemei Ding Jianping Wang Shiping Bai Qiufeng Zeng Zuowei Su Yue Xuan Keying Zhang Ling Zhou;Xuemei Ding;Jianping Wang;Shiping Bai;Qiufeng Zeng;Zuowei Su;Yue Xuan;Keying Zhang

作者机构：Institute of Animal NutritionKey Laboratory for Animal Disease-Resistance Nutrition of China Ministry of EducationSichuan Agricultural University211 Huimin RoadWenjiangChengdu611130China 

出 版 物：《Animal Nutrition》 (动物营养（英文版）)

年 卷 期：2021年第7卷第3期

页      面：650-660页

核心收录：

学科分类：090502[农学-动物营养与饲料科学] 0905[农学-畜牧学] 09[农学] 

基　　金：financially supported by the National Science and Technology Project(2014BAD13B04) Sichuan Provincial Science and Technology Project(2018NZ20009) 

主　　题：Tea polyphenol Antioxidant capacity Laying hen Ageing corn 

摘      要：This study was conducted to evaluate the effects of ageing corn levels(stored for 4 years)with or without the supplementation of tea polyphenols(TPP)on the performance,egg quality and antioxidant status of laying hens.A total of 288 Lohmann commercial laying hens(63-week-old)were used under a 2×4 factorial arrangement with 4 levels of dietary ageing corn(0%,25%,50%,or 100%)and 2 levels of TPP(0 and 600 mg/kg)for 8 *** ageing corn linearly decreased(P0.05)the egg production,serum total antioxidant capacity(T-AOC),liver glutathione peroxidase(GSH-Px)of laying hens,yolk index,yolk colour,1,1-diphenyl-2-picrylhydrazyl(DPPH)value and the reducing power value of egg yolk,but it linearly increased(P0.05)the feed conversion rate,ovary malondialdehyde(MDA)content of laying hens,and the protein carbonyl content of egg *** polyphenol supplementation increased(P0.05)the serum T-AOC,serum superoxide dismutase(SOD),liver SOD,liver GSH-Px,ovary SOD,GSH-Px,the expression of antioxidant-related genes of laying hens,albumen height,Haugh unit,DPPH value and the majority free amino acids of egg yolk,but it decreased(P0.05)the serum MDA content of laying hens,MDA and protein carbonyl of egg *** conclusion,the ageing corn significantly reduced the perfor-mance,egg quality,antioxidant status and egg antioxidant capacity of laying hens,while TPP supple-mentation partially counteracted the adverse effects,especially antioxidant status and egg antioxidant capacity of laying hens.