调质温度对肉鸡颗粒饲料质量影响的实验研究  

Experiment research on the effect of conditioning temperature on broiler pellet feed quality

作　　者：张现玲[1] 秦玉昌[1] 李俊[1] 董颖超[1] 刘国栋[1] 李军国[1] 

机构地区：[1]中国农业科学院饲料研究所,北京100081

出　　处：《饲料工业》2013年第21期24-28,共5页Feed Industry

基　　金：公益性行业(农业)科研专项项目"饲料高效低耗加工技术研究与示范"[201203015];北京市家禽产业技术体系项目支持;"十二五"国家科技支撑计划课题"安全优质饲料生产关键技术研发与集成示范"[2011BAD26B04]

摘　　要：饲料加工过程中的调质温度是影响饲料调质效果的关键因素之一，为获得肉鸡颗粒饲料（后期料）的适宜调质温度，实验在65、70、75、80、85、90℃6个不同温度下研究了调质温度对玉米-杂粕型肉鸡日粮颗粒耐久性（PDI）、硬度、淀粉糊化度、植酸酶活性保留率、蛋白质体外消化率、还原糖含量的影响，以评价调质温度对肉鸡颗粒饲料质量的影响。结果表明， PDI、硬度随调质温度升高极显著升高（P〈0.01），淀粉糊化度在调质温度达到75℃时达到30.32%，与80℃组比较无差异（P〉0.05）；蛋白质体外消化率随调质温度的升高呈现先上升后下降的趋势，最高值在80℃组，且极显著（P〈0.01）高于85℃组，与75℃组比较无差异（P〉0.05），80℃组植酸酶活性保留率极显著（P〈0.01）低于75℃组，85℃组极显著（P〈0.01）低于75℃组，还原糖含量随调质温度的升高极显著（P〈0.01）降低。玉米-杂粕型肉鸡全价颗粒饲料的适宜调质温度为75~80℃。Conditioning temperature is one of the key factors that influence the quality of the fi-nal feed products in the feed processing. In this research, 65, 70, 75, 80, 85 ℃ and 90 ℃ are selected to study the effect of conditioning temperature on the Pellet Durability Index （PDI）, hardness, gelatinization degree of starch, protein digestion rate in vitro and reducing sugar con-tent of the Corn- miscellaneous meal broiler diets to estimate the effect of conditioning temper-ature on broiler pellet feed quality. The results suggested that with the conditioning temperature increased,PDI and hardness showed significantly increase（P〈0.01）;the gelatinization degree of starch reached 30.32% under 75 ℃, which with no difference compared to 80 ℃（P〉0.05）. Pro-tein digestion rate in vitro showed a upward trend first then downward with the rise of condition-ing temperature, and arrived at the best value when under 80℃,with significant difference com-pared to 85 ℃（P〈0.01） but no difference to 75 ℃（P〉0.05）. when under 80 ℃ the phytase activi-ty retention rate showed significantly lower than which under 75 ℃ （P〈0.01）, 80 ℃showed significantly lower than 85 ℃ （P〈0.01）. The reducing sugar content showed a significant downward trend with the condition-ing temperature increasing（P〈0.01）. It could be concluded that the suitable conditioning temperature for complete pellet feed of broiler （later material） is 75~80℃.

关 键 词：调质温度 颗粒饲料 饲料质量 

分 类 号：S831.5[农业科学—畜牧学]