摘要
为了探讨０～３周龄肉仔鸡日粮中维生素Ｅ的适宜供给量，将一日龄艾维茵肉仔鸡９００只分成５个处理组，每组含６个供测定生产性能用的重复小组（各小组２２只，公母各半）和１个含公雏鸡４５只的小组，以便采血、屠宰取器官供测定α生育酚和硫巴比妥酸反应物质（ＴＢＡＲＳ）。各组的基础日粮相同，含α生育酚１３ｍｇ／ｋｇ，各组日粮中分别添加ｄｌα生育酚醋酸酯０、５、１０、５０和１００ｍｇ／ｋｇ。试验结果表明，０～３周龄肉仔鸡的玉米豆粕豆油型日粮中不同维生素Ｅ水平不明显影响采食量；维生素Ｅ含量达到１８～２３ｍｇ／ｋｇ以上才能维持肉仔鸡正常的快速生长及１１～２１日龄阶段血浆恒定的α生育酚含量，当日粮中只含维生素Ｅ１３ｍｇ／ｋｇ时，血浆和肝脏中α生育酚明显随鸡日龄增大而耗竭（Ｐ＜００５）。日粮中维生素Ｅ含量达到１１３ｍｇ／ｋｇ时，肉仔鸡肝脏组织的α生育酚含量在各日龄点明显最高（Ｐ＜００５）且较恒定，ＴＢＡＲＳ值在１１、１６及２１日龄时最低且与含维生素Ｅ１３ｍｇ／ｋｇ和１８ｍｇ／ｋｇ组的差异显著，说明抗氧化能力最强。
One experiment has been conducted to determine the optimal allowance of vitamin E in the diet for broiler chicks aged 0～3 weeks.Nine hundred one day old Avian broiler chicks were allotted into five treatment groups,each group had 6 replicates (pens) of 22 sex mixed chicks for performance evaluation,and 1 pen of 45 male chicks for sampling blood and liver for determining plasma and hepatic α tocopherol concentrations and thiobarbiuric acid reactive substances (TBARS) in the liver.The basal dietary vitamin E concentration was 13mg/kg,and the five different α tocopherol acetate supplementation levels were 0,5,10,50 and 100mg/kg respectively. The results showed that in the corn soybean meal soy oil(5%) type diet for 0～3 weed old broiler chicks different inclusion levels of vitamin E did not obviously influence feed intake of chicks,inclusion of vitamin E 18～23mg/kg was necessary for chicksnormal rapid growth and constant plasma α tocopherol levels during the period of 11～21 days of age.When the diet was with vitamin E 13mg/kg,the α tocopherol in the plasma and liver significantly gradually depleted in the chicks as aged.Dietary allowance of 63mg/kg significantly improved the cihcksfeed conversion efficiency.The highest hepatic α tocopherol concentrations were in chicks allowed diet with vitamin E 113mg/kg,and no matter what age of sampling,at age of 11,16 and 21 days,the hepatic TBARS levels of broiler chicks were significantly lower than that of chicks fed diets with Vitamin E 13 or 18mg/kg( P <0.05).This result suggests the hepatic tissues have highest antioxidant capacity when the chicks were supplemented with the highest vitamin E level in this experiment.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
1999年第4期289-295,共7页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
关键词
肉仔鸡
维生素E
Α-生育酚
饲料
Broiler chick,Vitamin E,α tocopherol,Thiobarbituric acid reactive substance
