植酸酶对肉鸡生长性能及养分表观消化率的影响  

Effect of Phytase on Growth Performance and Apparent Digestibility of Nutrients of Broilers

作　　者：吴春琴[1] 闫丰英 张晓旭[2] 陈莎[2] 钱利纯[2] 

机构地区：[1]温州科技职业学院,浙江温州325006 [2]浙江大学,浙江杭州310029

出　　处：《温州科技职业学院学报》2016年第1期24-29,共6页Journal of WenZhou Vocational College of Science And Technology

摘　　要：选用1日龄艾维茵肉鸡800只，公母各自分成5组，每组4个重复，分别在低磷日粮中添加0，250，500，750U／kg植酸酶进行饲养试验。结果显示：植酸酶显著提高了肉鸡42d增重并降低了料重比（P〈0．05），公鸡剂量组最优为500u／kg，母鸡剂量组最优为750U／kg。植酸酶显著提高植酸磷利用率（P〈O．05），随着植酸酶水平增加，血清碱性磷酸酶活性显著降低（P〈0．05），血清羟脯氨酸含量显著降低（P〈0．05），血清磷水平逐渐增加接近正常磷组水平。植酸酶显著提高了肉鸡对粗蛋白的表观消化率（P〈0．05），公、母鸡剂量组最优均为7sou／kg；500U／kg剂量组的植酸酶显著提高了公鸡对粗脂肪的表观消化率（P〈0．05），母鸡各加酶组与对照组粗脂肪表观消化率差异不显著；500U／kg剂量组的植酸酶显著提高了公、母鸡对锌、铁的表观消化率。研究表明植酸酶能提高肉鸡生长性能，提高养分利用率，减轻环境．污染。The experiment has been conducted by choosing a total of 800 1-day-old avian broilers. The male and female groups were both divided into 5 groups with 4 replicates. In low-phosphorus diet, breeding experiment was carried out by adding 0, 250, 500 and 750 U/kg phytase. The results showed that phytase increased weight gain of 42-day-old broilers significantly （P〈0.05） and decreased feed/gain ratio （P〈0.05）. The optimal dose of male was 500 U/kg and 750 U/kg of female. Phytase could highly increase phytate phosphorus utilization （P〈0.05） . Serum alkaline phosphatase activity and serum hydroxyproline content were significantly decreased as phytase levels increased （P〈0.05）, while serum phosphorus levels gradually increased and were close to normal phospho- rus groups （P〈0.05）. Phytase significantly improved apparent digestibility of crude protein （P〈0.05） and the optimal doses of male and female were 750 U/kg. Phytase of 500 U/kg content had a significant increase in apparent digestibility of ether extract （P〈0.05）, but there were no significant differences among female groups. 500 U/kg phytase significantly improved apparent digestibility of zinc and iron of broilers. Researches had shown that phytase could increase growth performance and nutrient utilization of broilers and reduce environmental pollution.

关 键 词：植酸酶 肉仔鸡 生长性能 养分利用 

分 类 号：S831[农业科学—畜牧学]