α-酮戊二酸对热应激肉鸡生长性能和肌肉品质的影响  

Effects of Alpha-ketoglutarate on growth performance and meat quality of broilers under heat stress

作　　者：杨书慧[1] 谭灵琳 廖满 丁斌鹰[1] 易丹 王蕾[1] 

机构地区：[1]动物营养与饲料安全湖北省协同创新中心动物营养与饲料科学湖北省重点实验室武汉轻工大学动物科学与营养工程学院,湖北武汉430023

出　　处：《饲料工业》2014年第22期11-16,共6页Feed Industry

基　　金："十二五"国家科技支撑计划[2012BAD39B04];湖北省教育厅科学技术研究项目[D20141701]

摘　　要：试验旨在研究α-酮戊二酸对热应激肉鸡生长性能和肌肉品质的影响。通过给高温应激肉鸡饲喂含0.5%α-酮戊二酸（α-ketoglutarate,AKG）的日粮35 d,研究AKG对热应激肉鸡生长性能、肌肉品质、抗氧化功能和能量代谢的影响。结果表明：1与对照组相比,热应激处理显著降低了肉鸡（1~35日龄）的生长性能（P〈0.05）和组织（胸腺、肝脏、胸肌和腹脂）的相对重量（P〈0.05）,同时也降低了肉鸡胸肌的a值、抗氧化酶（过氧化氢酶CAT和谷胱甘肽过氧化物酶GSH-Px）的活力、三磷酸腺苷（ATP）和二磷酸腺苷（ADP）含量及能荷（EC）值,但是提高了肉鸡胸肌一磷酸腺苷（AMP）的含量（P〈0.05）。2日粮中添加0.5%的AKG降低了热应激肉鸡的料重比（1~35日龄）、胸肌AMP含量（P〈0.05）,提高了热应激肉鸡血液抗氧化酶（CAT、SOD和GSH-Px）的活力（P〈0.05）,胸肌ATP、ADP和腺苷酸池（TAN）的含量及EC值（P〈0.05）。因此,日粮中添加0.5%的AKG可以降低热应激肉鸡的料重比,提高血液的抗氧化能力,改善胸肌的能量代谢。This study was conducted to investigate the effects of α-ketoglutarate（AKG） on growth per-formance, meat quality, antioxidative function, and energy metabolism of broilers under heat stress.Two hundred 1-day-old Cobb chickens were randomly divided into four groups（control group, heat-stress group, VC group, and AKG group）. Broilers in control group were fed the basal diet, and the VCand AKG groups were fed the basal diet supplemented with 0.025% vitamin C and 0.5% AKG, respec-tively. The feeding trial lasted for 35 days. The results showed that： 1 Compared with the controlgroup, heat-stress decreased the growth performance（P〈0.05）, as well as the activity of antioxidativeenzymes（CAT and GSH-Px）, the levels of ATP, ADP, and energy charge, and the relative weight of thy-mus, liver, breast muscle, and abdominal fat, but increased（P〈0.05） the AMP level. 2 Compared withthe heat-stress group diet supplemented with 0.5% AKG increased the activities of serum CAT, SOD,and GSH-Px（P〈0.05）, levels of ATP, ADP, TAN, and EC in breast muscle, but reduced the ratio offeed to gain, and AMP content of heat-stressed broilers（P〈0.05）. These results suggested that diet withsupplementation of 0.5% AKG can increase the antioxidant capacity and improve muscle energy metab-olism and feed conversion efficiency of broilersunder heat stress.

关 键 词：Α-酮戊二酸 热应激 肉鸡 肉品质 能量代谢 

分 类 号：S831.5[农业科学—畜牧学]