制粒温度对饲喂含植酸酶日粮肉仔鸡生长性能及钙磷利用的影响

选用160只1日龄肉仔鸡随机分为4组，每组设4个重复，以正常磷日粮为对照，研究在低磷日粮中添加植酸酶，分别于不同温度（75℃、80℃、85℃）制粒对肉仔鸡生长性能及钙、磷利用的影响。结果表明：①不同制粒温度条件下，低磷日粮添加植酸酶均可提高肉仔鸡的平均日增重和饲料利用率，75℃组好于其他温度组；②与对照组比较，2、3、4组肉仔鸡磷排出量（g／kg采食日粮）分别降低了33．45％、32．41％和29．66％（P〈O．05）；③除75℃组胫骨长度显著高于对照组外（P〈O．05），各试验组各项胫骨指标与对照组差异均不显著（P〉O．05）；④各组血清磷、血清钙、血清碱性磷酸酶差异不显著（P〉O．05）；⑤与对照组比较，各试验组的总磷、钙、粗蛋白、干物质表观消化率均提高（P〉O．05）。

Effects of Pelleting Temperature on Growth Performance, Calcium and Phosphorus Utilization in Broilers Fed Contained Phytase Diets

160 one-day-old broilers were randomly divided into four group,each with four replications. Atrial was conducted to study effects of different pelleting temperature(75,80,85)on growth performance,calcium and phosphorus utilization in broilers fed contained phytase diets.The results obtained were as follows:Under different pelleting temperature condition,adding phytase to low phosphorus diets improved ADG and feed conversion rate,the 75 group was better than others. Compared with control group,the Pexcretion(g/kg feeding diets)of group 2,3,4 broilers reduced 33.45%,32.41% and 29.66%(P<0.05).Besides the length of tibia bone of 75 group is significantly higher than control group(P<0.05),the quality of tibia bone of experimental group are not differed significantly with control group(P>0.05).The concent ration of serum P,Ca,AKP of treatment group are not differed significantly(P>0.05).Compared with control group,the apparent digestion of T P,Ca,protein and dry material are improved(P>0.05).