摘要
为了研究日粮中添加甜菜碱对藏鸡抗氧化功能和肌肉品质的影响,试验将180只体重相近的30周龄健康产蛋藏种鸡随机分为3组,分别为对照组、低剂量组和高剂量组,每组6个重复,每个重复10只,对照组仅饲喂基础日粮,低剂量组和高剂量组分别饲喂在基础日粮中添加1000 mg/kg和3000 mg/kg甜菜碱的试验日粮,预试期7 d,正试期49 d;试验结束后,测定各组血清、肝脏、胸肌和腿肌抗氧化指标[超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GSH-Px)活性及丙二醛(MDA)含量],以及胸肌和腿肌滴水损失率、蒸煮损失率、肉色(亮度、红色度和黄色度)、剪切力和全质构(硬度和黏度)。结果表明:高剂量组肝脏SOD活性显著高于低剂量组和对照组(P<0.05);高剂量组和低剂量组胸肌SOD活性显著高于对照组(P<0.05),MDA含量显著低于对照组(P<0.05);低剂量组腿肌SOD活性显著高于对照组(P<0.05);高剂量组和低剂量组腿肌GSH-Px活性极显著高于对照组(P<0.01);高剂量组和低剂量组胸肌亮度(L^(*)值)显著低于对照组(P<0.05),而高剂量组和低剂量组之间差异不显著(P>0.05);高剂量组腿肌硬度(生肉)极显著低于对照组(P<0.01),与低剂量组差异不显著(P>0.05);低剂量组腿肌硬度(生肉)显著低于对照组(P<0.05);血清SOD、GSH-Px活性和MDA含量,肝脏GSH-Px活性和MDA含量,胸肌GSH-Px活性、滴水损失率、蒸煮损失率、红色度(a^(*)值)、黄色度(b^(*)值)、剪切力(熟肉和生肉)、硬度(生肉)、黏度(生肉),以及腿肌MDA含量、滴水损失率、蒸煮损失率、亮度(L^(∗)值)、红色度(a^(*)值)和黄色度(b^(*)值)、剪切力(熟肉和生肉)、黏度(生肉)在各组间均差异不显著(P>0.05)。说明在藏鸡日粮中添加甜菜碱可在一定程度上提高藏鸡的抗氧化功能和肌肉品质,本试验设置的高低两个剂量对藏鸡的抗氧化功能和肌肉品质的影响差异不大。
To investigate the effects of adding betaine to the diet on antioxidant function and meat quality of Tibetan Chicken,18030-week-old healthy Tibetan breeder hens with similar body weight during the egg-laying period were randomly divided into 3 groups:control group,experimental low-dose group and experimental high-dose group.In each group,there were 6 replicates with 10 chikens in each replicate.The hens in the control group was fed basic diet,and the hens in the experimental low-dose group and high-dose group were fed basic diet supplemented with 1000 mg/kg and 3000 mg/kg betaine,respectively.The pre-trial period lasted for 7 days,and the trial period lasted for 49 days.At the end of the experiment,antioxidation related indexes(the activities of superoxide dismutase[SOD]and Glutathione peroxidase[GSH-Px]and the content of Malondialdehyde[MDA])in serum,liver,the rate of drip loss,cooking loss of chest muscle and leg muscle and meat color(brightness,redness and yellowness),shear force and texture(hardness and viscosity)in chest and leg muscles were determined.The results showed as follows:the activity of liver SOD in the high-dose group was significantly higher than that in the experimental low-dose group and control group(P<0.05);the SOD activity of chest muscle in the high-dose group and experimental low-dose group was significantly higher than that in control group(P<0.05);the content of MDA was significantly lower than that in the control group(P<0.05);the SOD activity of leg muscle in the experimental low-dose group was significantly higher than that in the control group(P<0.05);the GSH-Px activity of leg muscle in the high-dose group and experimental low-dose group was significantly higher than that in the control group(P<0.01);the chest muscle brightness(L^(*) value)in the high-dose group and experimental low-dose group was significantly lower than that in the control group(P<0.05),but there was no significant difference between the high-dose group and the experimental low-dose group(P>0.05);the hardness of
作者
王云浩
郑玉才
李志雄
谈永萍
饶开晴
WANG Yunhao;ZHENG Yucai;LI Zhixiong;TAN Yongping;RAO Kaiqing(College of Animal and Veterinary Sciences,Southwest Minzu University,Chengdu 610041,China)
出处
《黑龙江畜牧兽医》
CAS
北大核心
2022年第10期98-103,共6页
Heilongjiang Animal Science And veterinary Medicine
基金
四川省科技计划项目(2021YFYZ0031,2020YFSY0048)。
关键词
藏鸡
甜菜碱
饲料添加剂
抗氧化功能
肌肉品质
Tibetan chickens
betaine
feed additive
antioxidant function
meat quality
