禽胰多肽对肉鸡增重及内分泌影响的研究

Studies of the effects of APP crude products on growth and endocrine in broiler

选取1日龄艾维茵鸡160只,随机分为4组,每组40只。基础日粮含ME12.91、12.90MJ/kg,CP23%、21%。1￣21日龄期间,分别按体重在Ⅰ～Ⅳ组鸡基础日粮中添加0、1.16、3.48和10.44mg/kg禽胰多肽(APP)制品。鸡只自由采食及饮水,24h光照,试验期44d。试验结果表明:禽胰多肽能促进鸡甲状腺的发育,显著提高血浆甲状腺素(T4)浓度(P<0.05);促进鸡只的生长发育,显著提高肉鸡的增重(P<0.05),并改善饲料报酬。本试验中APP适宜添加量为每天每千克体重1.16mg。

160 Avain chickens aged 1 day were randomly divided into four groups （n=40）. The birds were fed a commercial diets containing ME 12.91 MJ/kg,12.90 MJ/kg; CP 23% ,21%. Group 1 serve as control. Avain pancreatic polypeptide （APP） crude products were added to the diets of groups 1-4 at doses of 0,1.16,3.48and 10.44 mg/（kg BW·d） respectively from 1st to 21th day.Feed and water were provided ad libitum and 24-hour lighting was adopted.Every 10 day from 14th to 44th,birds were weighted respectively,and 10 blood samples from each group were collected. Plasma concentrations of triiodthyroine（T3）, thyroxine（T4）, growth hormone（GH） and insulin were measured by radioimmunoassay （RIA）. The results suggested that APP crude products could promote development of chicken thyroid gland,significantly increase plasma T4 concentration,promote broiler growth （P〈0.05） and improve feed efficiency.The optimum supplemented dose was 1.16 mg/（kg BW·d） in this trial.