摘要
选用 2 1日龄AA肉仔鸡 2 4 0只 ,研究了热应激 (室温 32~ 35℃ ,相对湿度 80 %~ 82 % )和非应激 (室温 2 0~ 2 5℃ ,相对湿度 65%~ 70 % )状态下日粮添加维生素C对肉仔鸡生产性能和体内维生素C合成能力的影响。试验结果表明 ,肉仔鸡在应激状态下血浆维生素C含量降低 ,日粮补充 2 0 0mg/kg维生素C可以明显提高血浆维生素C含量。热应激导致肉仔鸡肝脏维生素C合成关键酶———古洛糖酸内酯氧化酶活性明显降低 ,使维生素C的合成能力减弱。日粮添加维生素C可提高应激状态下肉仔鸡肝脏古洛糖酸内酯氧化酶活性。随肉仔鸡日龄的增加 ,肉仔鸡肝脏古洛糖酸内酯氧化酶活性有上升趋势 ,表明维生素C合成能力随日龄的增加逐渐提高。
Two hundred forty four week old Arbor Acre broilers were used to study the effect of dietary vitamin C supplementation on production performance and the capacity of biosynthesis of vitamin C in broilers under heat stress (room temperature 32~35℃,humidity 80%~82%)and thermoneutral status(room temperature 20~25℃,humidity 65%~70%).The result showed that marked decline of plasma vitamin C of broilers was caused under heat stress,and supplemental vitamin C(200mg/kg)could bring plasma vitamin C back to normal.Heat stress also caused hepatic gulonolactone oxidase activity to decrease,which indicated the decrease of the capacity of biosynthesis of vitamin C in broilers.Supplemental vitamin C had a positive effect on the activity of hepatic gulonolactone oxidase under heat stress status.The results suggested that supplemental vitamin C might be beneficial to commercial broilers under heat stress.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
2000年第6期497-502,共6页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
基金
国家自然科学基金资助项目! (39370 5 18)