低钙磷日粮中添加不同剂量植酸酶对肉鸡生长性能和胫骨指标的影响  

Effects of different levels of phytase in low calcium and phosphorus diets on growth performance and tibia indexes of broilers

作　　者：燕磊 吕尊周 张南斌 陶玉岭 王正国 王萍 刘永学 李鑫 吕明斌 周桂莲 YAN Lei;LV Zunzhou;ZHANG Nanbin;TAO Yuling;WANG Zhengguo;WANG Ping;LIU Yongxue;LI Xin;LV Mingbin;ZHOU Guilian(Shandong New Hope Liuhe Group Co.,Ltd.Qingdao,Shandong Province 266061,China;Sichuan New Hope Liuhe Technology Innovation Co.,Ltd.Chengdu,Sichuan Province 610101,China;Weifang New Hope Liuhe Feed Technology Co.,Ltd.Weifang,Shandong Province 261000,China;Laiyang Liuhe Feed Co.,Ltd.,Yantai,Shandong Province 265200,China)

机构地区：[1]山东新希望六和集团有限公司,山东青岛266061 [2]四川新希望六和科技创新有限公司,四川成都610101 [3]潍坊新希望饲料科技有限公司,山东潍坊261000 [4]莱阳六和饲料有限公司,山东烟台265200

出　　处：《中国饲料》2020年第23期44-49,共6页China Feed

基　　金：山东省泰山产业领军人才工程高效生态农业创新类项目(LJNY2015006);山东省重点研发计划项目(2019JZZY020602);青岛市民生科技计划项目(18-6-1-113-nsh);烟台市“双百计划”人才项目(烟发办[2019]16号);新希望集团“百人计划”项目(NHHT20182203)。

摘　　要：为研究低钙磷日粮中添加不同剂量植酸酶对肉鸡生产性能和胫骨指标的影响,试验选取1日龄罗斯308公母混合肉仔鸡2688只,随机分为7个处理。处理1组为正对照组(PC组),处理2组为负对照组1(NC1组,钙磷水平均在PC组基础上降低0.1%),处理4~5组在NC1组日粮中分别添加500、1000 U/kg植酸酶,处理3组为负对照组2(NC2组,钙磷水平均在PC组基础上降低0.2%),处理6~7组在NC2组日粮中分别添加500、1000 U/kg植酸酶。试验结果表明:1~7日龄育雏阶段,NC2组肉鸡日增重与对照组相比降低2.99%,呈显著差异(P<0.05),在NC2组基础日粮中添加1000 U/kg植酸酶使日增重增加5.29%(P<0.05);8~21日龄生长阶段,NC1组和NC2组日均采食量、日增重显著低于对照组10.58%、2.43%和3.09%、11.80%(P<0.05),且钙磷水平越低肉鸡生长性能越差,在NC1组基础日粮中添加500、1000 U/kg植酸酶使日均采食量、日增重分别增加2.87%、3.99%和3.75%、5.62%(P<0.05),在NC2组基础日粮中添加500、1000 U/kg植酸酶使日均采食量、日增重分别增加10.88%、11.29%和12.14%、12.76%(P<0.05);在22~35日龄生长阶段,与对照组相比,NC2组肉鸡日采食量和日增重降低12.65%和11.88%,呈显著差异(P<0.05),在NC2组日粮基础上分别添加500 U/kg和1000 U/kg植酸酶均可显著提高肉鸡的日采食量和日增重(P<0.05)。在7日龄和21日龄时,与对照组相比,NC2组胫骨灰分、钙、磷含量分别降低22.20%、19.17%、24.36%和19.16%、19.50%、25.56%(P<0.05),在NC1组基础上添加植酸酶对21日龄肉鸡胫骨指标无显著影响,而在NC2组基础上添加植酸酶可显著提高其含量,说明钙磷水平越低改善效果越明显。综上所述,日粮中钙磷水平降低会对肉鸡的采食量、日增重、胫骨钙磷沉积等指标产生不良影响,在低钙、磷日粮中添加植酸酶会减弱甚至逆转这一影响,随着植酸酶剂量的提高起到的改善作用越明显。The purpose of this experiment was to investigate the effects of different levels of phytase on broiler performance and tibial parameters under low calcium and phosphorus diets.A total of 26881 day old Ross 308 male and female mixed broilers were randomly divided into 7 treatments.Group 1 was positive control(PC group),group 2 was negative control group 1(NC1 group,effective phosphorus and calcium were reduced by 0.1%with PC group basis),and group 4~5 was added 500,1000 U/kg phytase in NC1 group diet,group 3 was negative control group 2(NC2 group,effective phosphorus and calcium were reduced by 0.2%with the basis of PC group),and group 6~7 was added 500,1000 U/kg phytase in NC2 group diet.The test results showed that:at the brooding stage of 1~7 days of age,compared with the control group,the average daily gain(ADG)of NC2 group was decreased by 2.99%(P<0.05),spraying 1000 U/kg of phytase on the basis of NC2 group increased the daily weight gain by 5.29%(P<0.05);In the growth stage of 8~21 days of age,compared with the control group,the average daily feed intake(ADFI),ADG of NC1,NC2 groups were decreased by 10.58%,2.43%和3.09%,11.80%(P<0.05),the lower the level of calcium and phosphorus,the worse the growth performance of broilers,spraying 500,1000 U/kg of phytase on the basis of NC1 group increased ADFI,ADG by 2.87%,3.99%和3.75%,5.62%(P<0.05),spraying 500,1000 U/kg of phytase on the basis of NC2 group increased ADFI,ADG by 10.88%,11.29%和12.14%,12.76%(P<0.05);In the growth stage of 22~35 days of age,compared with the control group,ADFI,ADG of NC2 group were decreased by 12.65%和11.88%(P<0.05),spraying 500,1000 U/kg of phytase on the basis of NC2 group could increased ADFI and ADG(P<0.05).At 7 days and 21 days of age,compared with the control group,the content of ash,calcium and phosphorus in the NC2 group were significantly lower 22.20%,19.17%,24.36%and 19.16%,19.50%,25.56%(P<0.05),spraying phytase on the basis of NC1 group could increased the content of ash,calcium and phosphorus at 7 days,spraying phytase o

关 键 词：植酸酶 肉鸡 生长性能 胫骨发育 

分 类 号：S816.7[农业科学—饲料科学]