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硫酸锌和蛋氨酸锌对产蛋后期蛋鸡生产性能、蛋品质及抗氧化性能的影响

DOI: 10.3969/j.issn.1006-267x.2013.12.013

Keywords: ,蛋鸡,生产性能,蛋品质,抗氧化

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Abstract:

本试验旨在研究硫酸锌和蛋氨酸锌对产蛋后期蛋鸡生产性能、蛋品质及抗氧化性能的影响。选取504只产蛋率和体重相近、健康的54周龄海兰灰蛋鸡,随机分成7组,每组6个重复,每个重复12只鸡。预试期4周,正试期6周,预试期饲喂缺乏锌的玉米-豆粕型基础饲粮(锌水平29.07mg/kg),以尽量排除锌的影响;正试期各组分别饲喂基础饲粮和在基础饲粮中分别添加硫酸锌和蛋氨酸锌(锌添加水平分别为35、70和140mg/kg)的试验饲粮。结果表明:1)锌源未显著影响产蛋率、平均日采食量、料蛋比(P>0.05),但锌添加水平显著影响平均蛋重(P<0.05),锌添加水平为35mg/kg时平均蛋重显著高于70、140mg/kg时(P<0.05);2)锌源和锌添加水平均显著影响蛋壳厚度(P<0.05),140mg/kg蛋氨酸锌组蛋壳最厚;饲喂3周时70mg/kg硫酸锌组的鸡蛋蛋白高度和哈夫单位显著高于对照组(饲喂基础饲粮)(P<0.05),而饲喂6周时,各组无显著差异(P>0.05);锌源未显著影响蛋壳强度和蛋黄颜色(P>0.05);单因素方差分析显示,70mg/kg硫酸锌组蛋品质最好;3)锌源和锌添加水平显著影响蛋鸡血浆和肝脏内的总超氧化物歧化酶(T-SOD)、铜锌超氧化物歧化酶(Cu,Zn-SOD)活性,总抗氧化能力(T-AOC),抗超氧阴离子能力(抗O2-能力)等抗氧化指标(P<0.05),由各指标及单因素方差分析的结果可得出,70mg/kg硫酸锌组抗氧化性能最佳。由此可见,锌源未显著影响蛋鸡生产性能,但在一定程度上提高鸡蛋品质、改善机体抗氧化状态,本试验条件下,产蛋后期海兰灰蛋鸡饲粮中使用硫酸锌且锌添加水平为70mg/kg时效果最佳。

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