摘要
为探讨游离氨基酸、寡肽和完整蛋白对肉鸡消化道发育、消化酶分泌影响,选择450只健康1日龄AA肉仔鸡,随机分为6组,每组5个重复,每个重复15只鸡,公母各半。分别饲喂6种纯合日粮,其日粮蛋白分别为游离氨基酸、不同比例寡肽氨基酸混合物(25∶75、50∶50、75∶25、100∶0)和完整酪蛋白,分别在7、14、21日龄测定小肠各段绒毛长度、隐窝深度,食糜中胃蛋白酶、胰蛋白酶、糜蛋白酶活性。结果表明:①寡肽对肠绒毛生长有明显促进作用,可以提高绒毛长度,降低隐窝深度,增加吸收面积;②寡肽对蛋白酶分泌有促进趋势,但主要是影响糜蛋白酶活性,对胰蛋白酶、胃蛋白酶活性影响不明显。
To discuss the effect of different protein sources on small intestine development and related enzyme secretion. 450 one-day-age AA broilers were selected and divided into 6 groups with 5 replications and fed with six kinds of dlet,contalning free amino acid,oligopeptide and amino acid mixtures in different ratios (25:75,50:50,75:25,100:0) and the integrity of casein respectively. The villous height and crypt depth was measured at 7,14,21 daysand villous height/crypt depth was calculated. The activity of pepsin,trypsin and chymotrypsin was also tested. The results showed: (1)Oligopeptide increased villous height and decreased crypt depth; (2)Oligopeptide improved protease secretion,especially chymotrypsin,but had no significant effect on trypsin or pepsin.
出处
《中国家禽》
北大核心
2010年第11期18-21,共4页
China Poultry
基金
国家自然科学基金资助项目(30270963)
石家庄市科学技术研究与发展计划课题(09150162A)
关键词
氨基酸
寡肽
酪蛋白
小肠发育
蛋白酶
amino acid
oligopeptide
casein
small intestine development
protease