持续冷热环境对肉鸡生产性能、糖代谢和解偶联蛋白mRNA表达的影响  

Effects of Prolonged Cold and Hot Environment on Performance,Glucose Metabolism and Uncoupling Protein mRNA Expression of Broilers

作　　者：苏红光 张敏红[1] 冯京海[1] 吴鑫[1] 胡春红[1] 

机构地区：[1]中国农业科学院北京畜牧兽医研究所,动物营养学国家重点实验室,北京100193

出　　处：《动物营养学报》2014年第11期3276-3283,共8页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：国家科技支撑计划课题"畜禽健康养殖环境控制关键技术与集成"(2012BAD39B02);中国农业科学院科技创新团队项目(ASTIP-IAS07)

摘　　要：本试验研究了不同环境温度（10-30℃）持续14 d对肉鸡生产性能、糖代谢和禽类解偶联蛋白（av UCP）mRNA表达的影响。试验选取21日龄爱拔益加（AA）肉鸡288只,随机分到6个人工环境控制舱中,每个舱饲养6笼,每笼8只鸡作为1个重复。预试期7 d,温度22℃,相对湿度60%。28日龄时将各环境控制舱温度分别逐渐（1 h内）调到10、14、18、22、26和30℃,相对湿度60%,温湿度均保持恒定直至试验结束。正试期14 d。结果表明：1）试验期内,30℃组的体重（BW）显著低于14-26℃组（P〈0.05）;22-30℃组平均日采食量（ADFI）随温度升高而显著下降（P〈0.05）;10-30℃组平均日增重（ADG）随温度升高出现先升高后下降的趋势,在22℃时最高;料重比（F/G）随温度升高呈现先下降后升高的趋势,22℃时最低;平均日饮水量（ADWC）在10℃组最低。2）试验第14天,26℃组血糖水平显著低于18℃组（P〈0.05）;肝糖原水平在各组之间差异不显著（P〉0.05）;22℃组肌糖原水平显著低于10、26和30℃组（P〈0.05）。3）试验第14天,18、22℃组av UCP mRNA相对表达量显著高于其他组（P〈0.05）。结果提示：在本试验条件下,从生产性能和能量利用效率考虑,28-42日龄AA肉鸡的适宜养殖温度为22-26℃。This study was conducted to investigate the effects of different environmental temperatures（ ranged from 10 to 30 ℃） on performance,glucose metabolism and expression of avian uncoupling protein（ av UCP）mRNA of broilers. Two hundred and eighty eight 21-day-old Arbor Acres（ AA） broilers were assigned to six environmental chambers,each chamber contained six cages with eight birds per cage,and each cage as a replicate. The pre-test period lasted for 7 days and broilers were kept at 22 ℃ temperature and 60% relative humidity. W hen broilers were 28-day-old,the temperatures of each environmental chamber were gradually（ within1 h） regulated to 10,14,18,22,26 and 30 ℃,respectively,while maintaining the relative humidity at 60%and both kept constant until the end of the experiment. The trial period lasted for 14 days. The results showed as follows： 1） throughout the trial period,the body weight（ BW） of broilers in 30 ℃ group was significantly lower than 14 to 26 ℃ groups（ P 〈0.05）; average daily feed intake（ ADFI） of broilers in 22 to 30 ℃ groups were significantly decreased with the increase of environmental temperature（ P 〈0. 05）; average daily gain（ ADG） of broilers in 10 to 30 ℃ groups were increased firstly and then decreased with the increase of environmental temperature（ P 〈0.05）,and 22 ℃ group was the highest; with the increase of environmental temperature,the ratio of feed to gain（ F / G） decreased firstly and then increased,and the lowest point was reached at22 ℃; the average daily water intake（ ADW C） was minimum in 10 ℃ group. 2） after prolonged temperature treatment for 14 days,glycemia level was significantly higher in 18 ℃ group than 26 ℃ group（ P 〈0.05）; hepatic glycogen level was not significantly affected by environmental temperature（ P 〉0. 05）; muscle glycogen level was significantly lower in 22 ℃ group than 10,26 and 30 ℃ groups（ P 〈0.05）. 3） After prolonged temperature treatment for 14 days,rela

关 键 词：持续低温 持续高温 肉鸡 生产性能 糖代谢 解偶联蛋白 

分 类 号：S831[农业科学—畜牧学]