环境温度对肉鸡消化道内食糜排空和消化酶活性的影响  

THE EFFECT OF THERMAL ENVIRONMENT ON PASSAGE RATE OF CHYME AND ACTIVITEIS OF DIGESTIVE ENZYMES IN THE DIGESTIVE TRACT OF BROILERS

作　　者：林海[1] 杜荣[2] 

机构地区：[1]山东农业大学动物科技学院,山东泰安271018 [2]中国农业科学院畜牧研究所,北京100094

出　　处：《动物营养学报》2001年第1期49-53,共5页CHINESE JOURNAL OF ANIMAL NUTRITION

摘　　要：用ArborAcres肉鸡研究了环境温度对肉鸡消化机能的影响 ,3种环境温度分别为5℃、20℃、32℃。试验一的结果表明 ,环境温度对肉鸡消化道食糜的通行速度有显著的影响。低温处理(5℃)鸡肠道内残留食糜量显著低于对照组(20℃ ,P<0.05) ,而高温处理(32℃)则使之显著增高(P<0.01)。高温使嗉囊和小肠内食糜的排空速度显著降低(P<0.01)。试验二研究了环境温度对肉鸡小肠食糜内胰蛋白酶、胰糜蛋白酶和α -淀粉酶的活性变化。结果表明 :高温处理与对照组相比 ,显著降低胰蛋白酶(P<0.05)、胰糜蛋白酶(P<0.01)和α—淀粉酶的活性(P<0.01)。Two experiments were conducted to determine the effect of thermal environment on the digestion function of broilers.All the experimental birds were exposed to three temperatures:5℃,21℃,and 32℃,and relative humidity was maintained at 60%.In experiment one ,the amount of chyme in the whole digestive tract was decreased under cold environment(5℃,60%RH) and increased under hot environment(32℃,60%RH),compared with control environment(20℃,60%RH).The empting rate of chyme in crop or small intestine was suppressed under high temperature(32℃)(P<0.01).In experiment two,the activities of trypsin,chymotrypsin,and amylase were affected significantly by different environmental temperature treatments(P<0.01).Compared to normal environment,the activities of trypsin(P<0.01),chymotrypsin(P<0.05),and amylase(P<0.01)in intestinal juice were decreased under hot environment.The activities of the three kinds of digestive enzyme were not influenced by cold environment.

关 键 词：肉鸡 环境温度 食糜 消化酶 酶活性 排空速率 消化道 

分 类 号：S831.5[农业科学—畜牧学] S831.4[农业科学—畜牧兽医]