天门冬氨酸镁的不同添加水平和饲喂时间对肉仔鸡肌肉品质的影响  

Effects of Different Supplementation Level and Different Adminstration time Length of Magnesium Asparatate on Meat Quality of Broiler Chickens

作　　者：刘永祥[1] 刘艳丽[1] 刘太宇[1] 呙于明[2] 

机构地区：[1]郑州牧业工程高等专科学校畜牧工程系,郑州450008 [2]中国农业大学动物科技学院,北京100094

出　　处：《中国畜牧兽医》2008年第4期22-25,共4页China Animal Husbandry & Veterinary Medicine

基　　金：国家自然科学基金项目(30371043);郑州牧专博士基金项目(200602)

摘　　要：研究天门冬氨酸镁(MgAsp)的不同添加水平和饲喂时间对肉仔鸡胸肌品质的影响。在试验一中,256只AA肉仔鸡随机分配到4个处理组,每组8个重复,每个重复8只鸡,各处理MgAsp的添加量分别为0%、0.3%、0.6%、0.9%;在试验二中,试验分4个处理组,分别在第6、5、4周开始使用加镁日粮(MgAsp的添加水平为0.9%),以不添加MgAsp的日粮作为对照。试验一结果表明,肉仔鸡胸肌的pH随MgAsp添加量的增加成二次性的提高(P<0.01),胸肌的TBARS值随MgAsp添加量的增加呈线性降低(P<0.01),日粮中添加镁显著提高肌肉匀浆液中的LDH活性(P<0.05)。随着日粮中MgAsp添加量的增加,肌肉的亮值增加(P<0.05),蓝值下降(P<0.05);试验二结果表明,随着MgAsp添加时间的延长,除胸肌的TBARS外,肉品质的指标并未进一步改善,而且胸肌的pH和蓝值呈下降趋势。日粮添加MgAsp可以改善肉仔鸡胸肌品质;短时间(1周)的添加MgAsp对改善肉仔鸡胸肌品质是有效的。The experiment was conducted to investigate the effects Of dietary magnesium asparatate（MgAsp） supplementation level and different administration time length on brisket quality of broiler chickens. In Experiment 1, two hundred and fifty six male AA broiler chicks were allocated to four treatments, each treatment with eight replicates of 8 chickens. The birds were fed with the basal diet alone or supplemented with 0.3% ,0.6% ,0.9% MgAsp. In experiment 2, the birds were fed with the basal diet supplemented with 0.9% MgAsp from the sixth week, fifth week and fourth week,respectively, and the basal diet without Mg supplementation served as the control. In Experiment 1, pH value of brisket increased quadratically as dietary supplemental MgAsp increased （P〈0.01）. TBARS value of brisket decreased linearly as MgAsp supplementation increased （P〈 0.01）. Dietary MgAsp supplementation significantly increased LDH activity of （P〈0.05）. L value of brisket increased （P〈 0.05）and b value of brisket decreased as dietary MgAsp supplementation increased; In experiment 2, with the longer administration of MgAsp,except of TBARS of brisket, the quality of meat did not improve further. Dietary MgAsp supplementation can improve quality of meat, and the short time of MgAsp administration（1 week） is effective.

关 键 词：天门冬氨酸镁 肌肉品质 肉仔鸡 

分 类 号：S816.7[农业科学—饲料科学]