青贮黑麦草对生长后期土鸡生长性能和肉品质的影响  

Effects of silage ryegrass on growth performance and meat quality of native chickens in late growth stage

作　　者：徐海军[1] 邓奇元 朱小玉 杨宇晨 郑永菊 贾旭 李维萍 吴进东 Xu Haijun;Deng Qiyuan;Zhu Xiaoyu;Yang Yuchen;Zheng Yongju;Jia Xu;Li Weiping;Wu Jingdong(College of Biological and Pharmaceutical Engineering,West Anhui University,Anhui Lu'an 237012)

机构地区：[1]皖西学院生物与制药工程学院,安徽六安237012

出　　处：《现代畜牧兽医》2024年第2期34-39,共6页Modern Journal of Animal Husbandry and Veterinary Medicine

基　　金：2022年安徽省重点研究与开发计划项目(202204c06020034);安徽省本科质量工程项目(2021jyxm1663、2021jxtd311);全国大学生创新创业训练计划项目(202210376015)。

摘　　要：试验旨在探究土鸡生长后期补饲不同添加量的青贮黑麦草对土鸡生长性能和肉质的影响。选择132日龄的土公鸡60只,随机分为对照组、5%青贮黑麦草补饲组、10%青贮黑麦草补饲组和15%青贮黑麦草补饲组,每组3个重复,每个重复5只鸡。对照组饲喂全价配合日粮,其余3组分别用不同添加量(5%、10%、15%)的青贮黑麦草替代等量全价配合日粮。试验期42 d。结果显示:15%青贮黑麦草组土鸡的体重显著低于对照组(P<0.05)。各青贮黑麦草组土鸡的平均日增重极显著低于对照组(P<0.01),5%青贮黑麦草组和15%青贮黑麦草组土鸡的料重比显著高于对照组(P<0.05)。日粮中添加10%青贮黑麦草可显著提高土鸡肌肉肉色亮度(L^(*)值)(P<0.05),但对肉色红度(a^(*)值)和黄度(b^(*)值)无显著影响(P>0.05);日粮中添加各比例青贮黑麦草对肌肉pH值、嫩度、滴水损失、肌内脂肪均无显著影响(P>0.05),但添加10%和15%青贮黑麦草有减少滴水损失、增加嫩度和肌内脂肪含量的趋势。研究表明,在限饲条件下,对生长后期的土鸡补饲袋装青贮黑麦草会显著降低其生长性能,但对肉质具有一定的改善趋势。The purpose of the experiment was to investigate the effects of supplementing different amounts of silage ryegrass on growth performance and meat quality of native chickens at the late growth stage.Sixty 132-day-old roosters were randomly divided into the control group,5%silage ryegrass supplementation group,10%silage ryegrass supplementation group,and 15%silage ryegrass supplementation group,with three replicates in each group and five chickens in each replicate.The control group was fed with complete formula diet(basic diet),while the other three groups were fed with basic diet+5%silage ryegrass,basic diet+10%silage ryegrass and basic diet+15%silage ryegrass,respectively.The trial period was 42 days.The results showed that the body weight of 15%silage ryegrass group was significantly lower than that of the control group(P<0.05).The average daily gain of native chickens in each silage ryegrass group was extremely lower than that in the control group(P<0.01),and the feed to weight ratio of native chickens in the 5%silage ryegrass group and 15%silage ryegrass group was significantly higher than that in the control group(P<0.05).The inclusion of 10%silage ryegrass in the diet significantly increased the luminance(L^(*))of meat color of native chicken(P<0.05),but had no significant effect on the redness(a^(*))and yellowness(b^(*))of meat color(P>0.05).The dietary supplementation of silage ryegrass had no significant effect on muscle pH,tenderness,drip loss and intramuscular fat(P>0.05),but the dietary supplementation of 10%and 15%silage tended to decrease decreased drip loss and increased tenderness and intramuscular fat content.The results showed that under the condition of limited feeding,supplementing bagged silage ryegrass to native chickens at the late growth stage would significantly reduce their growth performance,but it tended to improve meat quality.

关 键 词：土鸡 限饲 青贮黑麦草 生长性能 肉品质 

分 类 号：S831.5[农业科学—畜牧学]