小麦型日粮添加木聚糖酶和植酸酶对肉鸡生长性能、回肠氨基酸表观消化率及常量元素沉积的影响  

Effects of dietary supplementation of xylanase and phytase on growth performance,ilea amio acid digestibility and mineral retention of broilers fed with wheat-based diets

作　　者：姜文联[1] 方心灵[1] 李海华[1] JIANG Wenlian;FANG Xinling;LI Haihua(Guangdong Polytechnic of science and trade,Guangzhou,Guangdong Province 510430,China)

机构地区：[1]广东科贸职业学院,广东广州510430

出　　处：《中国饲料》2019年第8期53-57,共5页China Feed

摘　　要：本文旨在研究小麦型日粮中添加木聚糖酶和植酸酶对肉鸡生长性能、回肠氨基酸表观消化率及矿物元素沉积的影响。试验选择1日龄科宝白羽肉仔鸡850只,随机分成5组,每组5个重复,每个重复34只鸡。一共有5种日粮,即低磷日粮、高磷日粮、低磷日粮+2000 IU/kg木聚糖酶、低磷日粮+500 FTU/kg植酸酶,低磷日粮+2000 IU/kg木聚糖酶+500 FTU/kg植酸酶,试验进行21 d。低磷组较高磷组显著降低了肉鸡的日增重、日采食量及趾骨灰分含量(P <0.05),与低磷组相比,木聚糖酶组显著降低了肉鸡的料比(P <0.05),而植酸酶组显著提高了肉鸡日增重、日采食量、趾骨灰分及饲料利用率(P <0.05)。复合酶组显著提高了15种氨基酸回肠表观消化率(P <0.05)。与低磷组相比,木聚糖酶组显著提高了表观消化能和可消化代谢能及回肠氮消化率(P <0.05),而植酸酶显著提高了氮沉积及回肠氮消化率(P <0.05),复合酶组显著提高了代谢能、可消化代谢能及氮沉积量(P <0.05)。植酸酶和复合酶组较高磷组显著提高了磷表观消化率和沉积量(P <0.05),但低磷组较高磷组显著提高了钙的表观消化率(P <0.05),植酸酶酶和复合酶组较其他3组显著提高了钾的沉积量(P <0.05)。结论 :小麦型日粮同时添加植酸酶和木聚糖酶对肉鸡生长和消化的影响要优于单独添加这两种酶。This study was conducted to evaluate the dietary supplementation of xylanase and phytase on growth performance,ilea amio acid digestibility and mineral retention of broilers fed with wheat-based diets.A total of 850 1 d Cobb broilers were allotted to 5 groups,which had 5 replicates of 34 broilers.There were 5 diets,namely,low phorsphrase(P)diet,high P diet,low P diet addition of 2000 IU/kg xylanase,low P diet addition of 500 FTU/kg phytase and low P diet addition of 2000 IU/kg xylanase+500 FTU/kg complex.The experiment last 21 d.The low-P diet depressed(P<0.05)weight gain,feed intake and toe ash content relative to the high P diet.The xylanase and phytase in the low P diet increased the ilea digestibility of 15 amino acids.Xylanase increased(P<0.05)apparent metabolism energy,ileal digestible energy,and ileal nitrogen digestibility compared with the low P diet group.Phytase and xylanase plus phytase diet group significantly(P<0.05)increased ileal digestible of P and total tract P retention of P in the high P diet,while the high P diet increased(P<0.05)the ileal digestible of Ca.Xylanase plus phytase and phytase diet groups increased(P<0.05)total tract retention of K compared with the other three groups.In summary,the addition of xylanase and phytase in wheat-based broiler diets generates greater responses than the individual component of the enzyme combination.

关 键 词：肉鸡 小麦 木聚糖酶 植酸酶 生长性能 回肠氨基酸表观消化率 常量元素 

分 类 号：S816.7[农业科学—饲料科学]