蛋氨酸螯合锌替代硫酸锌对肉鸡生产性能、肉品质及抗氧化指标的影响

doi:10.16431/j.cnki.1671-7236.2020.04.014

摘要/Abstract

摘要： 本试验旨在研究蛋氨酸螯合锌替代硫酸锌对肉鸡生产性能、肉品质及抗氧化指标的影响。试验选用1日龄体重接近的健康爱拔益加（AA）肉公鸡200只，随机分为2个处理，每个处理5个重复，每个重复20只鸡。各处理组肉鸡均饲喂基础日粮且将Zn的添加水平定为40 mg/kg，其中处理1组以硫酸锌形式添加锌，处理2组以蛋氨酸螯合锌形式添加锌。试验期为42 d。结果表明，①与硫酸锌相比，蛋氨酸螯合锌显著降低了22~42 d和1~42 d肉鸡的料重比（P < 0.05），但对各阶段肉鸡平均日采食量、平均日增重以及21和42 d肉鸡体重均无显著影响（P > 0.05）。②蛋氨酸螯合锌替代硫酸锌对42 d肉鸡宰前体重、屠体重、全净膛重、腿肌重、屠宰率、胸肌率和腿肌率均无显著影响（P > 0.05），但显著降低了42 d肉鸡全净膛率（P < 0.05），增加了42 d肉鸡胸肌重、腹脂重和腹脂率（P < 0.05）。③蛋氨酸螯合锌替代硫酸锌对42 d肉鸡胸肌肉色、滴水损失和蒸煮损失均无显著影响（P > 0.05）。④与硫酸锌相比，蛋氨酸螯合锌显著提高了21和42 d肉鸡血清铜锌—超氧化物歧化酶（CuZn-SOD）活力以及42 d肉鸡血清总抗氧化能力（T-AOC）（P < 0.05），降低了21 d肉鸡血清丙二醛（MDA）含量（P < 0.05），但对21和42 d肉鸡血清谷胱甘肽过氧化物酶（GSH-Px）活力无显著影响。由此可见，蛋氨酸螯合锌替代硫酸锌具有提高肉鸡生产性能和抗氧化功能的作用。

关键词: 蛋氨酸螯合锌; 肉鸡; 生产性能; 肉品质; 抗氧化

Abstract: To investigate the effects of zinc methionine instead of zinc sulfate on growth performance,meat quality and antioxidant status of broilers,200 one-day-old healthy male Arbor Acres (AA) broiler chicks with similar body weight (BW) were randomly allocated into 2 treatments with 5 replicates of 20 broilers per replicate in a completely randomized design.Broiler chickens in both treatments were fed a basal diet and the level of zinc was set at 40 mg/kg.In the treatment one,zinc was added in the form of zinc sulfate,and in the treatment two,zinc was added in the form of zinc methionine.The experiment lasted for 42 days.Results showed as follows:① Compared with zinc sulfate,zinc methionine significantly reduced the feed conversion rate of broilers in the grower phase or the entire period of the experiment (P<0.05),but did not affect the average daily feed intake,average daily gain,body weight at both 21 and 42 days of age of broilers (P>0.05).② Compared with zinc sulfate,zinc methionine significantly reduced the percentage of eviscerated yield (P<0.05),increased the breast muscle weight,abdominal fat weight and percentage of abdominal fat (P<0.05),but did not affect the slaughter weight,dressed weight,eviscerated weight,leg muscle weight,carcass yield,proportion of breast and thigh at 42 days of age (P>0.05).③ No significant differences were found in meat color,drip losses and boiling losses of breast muscle between zinc methionine and zinc sulfate treatments (P>0.05).④ Compared with zinc sulfate,zinc methionine significantly increased CuZn-superoxide dismutase (CuZn-SOD) activity in the serum at both 21 and 42 days of age and total antioxidant capacity (T-AOC) in the serum at 42 days of age (P<0.05),reduced malondialdehyde (MDA)concentration in the serum at 21 days of age (P<0.05),but did not affect the glutathion peroxidase (GSH-Px) activity (P>0.05).In conclusion,zinc methionine instead of zinc sulfate could positively affect growth performance and antioxidant status of broilers.

Key words: zinc methionine; broiler; growth performance; meat quality; antioxidant status

中图分类号:

S831.5

吴量, 赵旭, 邹田浩, 张秋华, 杨在宾. 蛋氨酸螯合锌替代硫酸锌对肉鸡生产性能、肉品质及抗氧化指标的影响[J]. 中国畜牧兽医, 2020, 47(4): 1092-1098.

WU Liang, ZHAO Xu, ZOU Tianhao, ZHANG Qiuhua, YANG Zaibin. Effects of Zinc Methionine Instead of Zinc Sulfate on Growth Performance, Meat Quality and Antioxidant Status of Broilers[J]. China Animal Husbandry and Veterinary Medicine, 2020, 47(4): 1092-1098.

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