日粮磷水平及磷限制日粮中添加不同浓度植酸酶对肉用仔鸡生长性能影响的研究  

Effect of Dietary Phosphorus Levels and Phosphorus Limited Diet Adding Different Concentrations of Phytase on the Growth Performance of Broiler Chickens

作　　者：王普阳[1] 龚月生[2] 杨明明[2] 王力[2] 白晓婷 WANG Puyang;GONG Yuesheng;YANG Mingming;WANG Li;BAI Xiaoting(Shaanxi Feed Industry Office,Xi'an,Shaanxi 710003,China;College of Animal Science and Technology,Northwest A&F University,Yangling,Shaanxi 712100,China;Zinpro(China)Animal Nutrition Technology Co.Ltd.,Shanghai 201100,China)

机构地区：[1]陕西省饲料工业办公室,陕西西安710003 [2]西北农林科技大学动物科技学院,陕西杨凌712100 [3]金宝(中国)动物营养科技有限公司,上海201100

出　　处：《家畜生态学报》2018年第9期27-31,共5页Journal of Domestic Animal Ecology

摘　　要：通过对高热稳定性、高耐酸性植酸酶生产价值的验证,研究了不同梯度日粮磷水平及磷限制日粮中添加不同浓度植酸酶对肉用仔鸡生长性能的影响。选择1日龄的AA白羽肉鸡(♂)800只,随机分为8个处理组,每组10个重复,每个重复10只鸡。处理组1为日粮正常组,基础日粮中有效磷的含量为0.45%;处理组2、3和4为日粮有效磷限制组,分别对日粮中有效磷的含量限制为0.35%,0.3%和0.25%。在处理组4的日粮基础上,分别对处理组5、6和7添加250U/kg,500U/kg和1000U/kg三个浓度梯次的植酸酶A,对处理组8添加100U/kg浓度的植酸酶B。试验期18d。结果表明,日粮有效磷限制组(处理组2、3和4)的肉用仔鸡18日体重、平均日采食量和料肉比等指标全都低于日粮正常组(处理组1),差异显著(P<0.05);根据日粮中不同浓度植酸酶的添加,18日龄内,肉用仔鸡的平均体重(R2=0.6241)和料肉比(R2=0.9383)均呈现线性增长,同时,植酸酶B添加组(处理组8)的日采食量和日增重均优于植酸酶A添加组(处理组5、6和7)(P<0.05)。因此,植酸酶可以有效的缓解日粮中有效磷不足对肉用仔鸡生长性能的影响,植酸酶B饲用效果优于植酸酶A。In this experiment,the effects of different concentrations of phytase on the growth performance of broiler chickens were studied by verifying the production value of high thermostability and high acid resistance phytase.The aim of this study was to investigate the bio-efficacy of heat-stable phytase with different available phosphorus(AP)level for broilers.A total of 800 broilers(Arbor Acres,D1)were allotted into 8 treatments with 10 replicates(cages)per treatment.Treatment 1(T1)was formulated to contain 0.45%available phosphorus(AP)in starter phase.T2,T3,and T4 treatments were formulated to be deficient in available phosphorus(AP),which contained 0.38%,0.31%and 0.24%available phosphorus(AP).T5 to T8 are formulated based on T4 and supplemented with three different levels(250,500,and 1000 U/kg)of phytase A and with 100 U/kg of phytase B.The duration was 18 days.Birds fed the phosphorus limited diet had poorer weight,average daily feed intake(ADFI),and Feed conversion rate(FCR)compared with those fed the regular diet.Supplementation of the diet with phytase exhibited a linear trend to improve body weight(R 2=0.6241)and Feed conversion rate(R 2=0.9383).Birds fed phytase B diets had better growth performance than birds fed phytase A diets.Treatments contained 0.38%,0.31%and 0.24%available phosphorus(AP)showed liner trend to decrease the content of ash,Ca and P in tibia,and exhibited a linear trend to improve the content of ash,Ca and P in tibia with the supplementation of phytase.It can be concluded that phytase can improve the growth performance of broiler chickens fed a diet that is formulated to be suboptimal in terms of P.Phytase B was more effective in the improvement of growth performance than phytase A.

关 键 词：植酸酶 肉用仔鸡 生长性能 胫骨质量 

分 类 号：S811.5[农业科学—畜牧学]