半胱胺对淮南麻鸭腺胃发育的影响

Effects of cysteamine on the development of proventriculus of Huainan duck

选用1日龄淮南麻鸭200羽,随机分成4个组,每组5个重复,每个重复10羽。从8日龄开始,分别在基础日粮中添加0(对照组)、100、200、400 mg/kg的半胱胺,连续饲喂28 d,采用大体解剖学方法和组织切片技术研究日粮添加半胱胺对淮南麻鸭腺胃发育的影响。结果表明:与对照组相比,100 mg/kg和200 mg/kg半胱胺添加组鸭腺胃重量分别增加了12.23%和26.63%(P<0.05),腺胃单管腺厚度分别提高了8.53%和15.28%(P<0.05),复管腺厚度分别提高了21.26%和32.42%,200 mg/kg半胱胺添加组腺胃发育指标最佳;各半胱胺添加组鸭腺胃组织中生长抑素免疫阳性细胞的分布密度与对照组相比均显著降低(P<0.05)。结果提示,日粮中适当添加半胱胺制剂可以促进淮南麻鸭腺胃发育,且其机制可能与降低腺胃组织中生长抑素浓度有关。

A total of 200 one-day-old Huainan ducks were randomly allotted into 4 groups with 5 replicates of 10 ducks each,which was fed the basal diet supplemented with 0,100,200,400 mg/kg cysteamine from 8 to 35 days of age, respectively.The effect of cysteamine on the development of the proventriculus was observed by the technique of gross anatomy and histological section.The results showed that：compared with the control group,the weight of proventrieulus of 100 mg/kg and 200 mg/kg cysteamine groups increased significantly by 12.23% and 26.63%（P 〈 0.05 ）,the simple tubular gland depth increased significantly by 8.53% and 15.28% （P 〈 0.05） and the compound tubular gland depth increased significantly by 21.26% and 32.42%（P 〈 0.05）,respectively.The effects was best when the group was supplemented with 200 mg/kg cysteamine.The distribution density of somatostatin-positive cells all decreased in the groups fed with cyeamine （P 〈 0.05）.The results indicated that diets supplemented with the appropriate dose of eysteamine could promote the de- velopment of the proventrieulus of the duck,which might be mediated by somatostatin.