摘要
旨在通过饲喂肉仔鸡添加普通植酸酶与耐高温植酸酶的日粮,比较2种植酸酶对肉仔鸡生产性能及血清生理生化指标的影响。选用4 800只1日龄AA肉仔鸡,随机分为6个处理,每处理5个重复。试验分2期进行,1～3和4～6周。试验对照组饲喂基础日粮,试验1组降低基础日粮磷的水平,试验2组与3组分别在试验1组的基础上添加普通植酸酶500和2 000U.kg-1,试验4组和5组分别添加耐高温植酸酶250和500U.kg-1。结果表明:(1)当降低基础日粮中磷添加水平时,日增重显著下降(P<0.05),料重比提高;在此基础上添加植酸酶,日增重提高,料重比下降,甚至优于对照组。从生长性能指标分析来看,250～500U.kg-1耐热植酸酶与2 000U.kg-1普通植酸酶效果相当,优于试验2组;(2)当降低基础日粮中磷添加水平时,血清磷水平显著降低,血清碱性磷酸酶活性显著提高;在此基础上添加植酸酶,血清磷水平和碱性磷酸酶活性恢复到对照组水平。对血清总蛋白、球蛋白、白蛋白、谷草转氨酶、谷丙转氨酶和钙含量等指标含量基本没有影响;(3)不同日粮处理对T4、T3、生长激素、胰岛素样生长因子Ⅰ、甲状旁腺激素和降钙素均没有显著性影响(P>0.05);与对照组相比,胰岛素样生长因子Ⅰ在试验组1呈降低趋势(P>0.05),而各植酸酶添加组呈提高趋势。本试验条件下,发现在低磷日粮中添加新型耐热植酸酶可以显著提高肉仔鸡的平均日增重,降低料重比;对于血清生理生化指标,2种植酸酶添加效果无显著差异。
This experiment was conducted to evaluate the effects of phytase and heat-resistant phytase on growth performance, blood biochemical and physiological parameters in AA broiler. 4 800 1-day-old AA broilers were randomly divided into 6 groups, 5 replicates per group, and were fed with two periods experimental diets from 1 to 3 weeks and from 4 to 6 weeks, respec- tively. Basal diet was fed in control group, the basal diet P levels was reduced in treatment group 1, AA broilrs were fed diets with 500 and 2 000 U ·kg-1 phytase in treatment group 2 and 3, 250 and 500 U·kg-1 heat-resistant phytase in treatment group 4 and 5. The results showed that re- ducing P add level of basal diet, ADG was significantly decreased （P〈0. 05）, F/G was in-creased; adding phytase, ADG was increased, F/G was decreased, and the effects were better than that of control group. On growth performance, the effects of heat-resistant phytase and 2 000 U ~ kg 1 ordinary phytase were similar, and better than that of treatment group 2; reduc- ing P add level of basal diet or adding different source phytases, ALP activity significantly in- creased, based on this, adding phytase, P in serum and ALP activity return to the level of control group, which had no significant influence on ALB, TP, GLB, GOT, GPT and Ca in serum~ different treatments had no significant effects on the T4, T3, GH, IGF-I, PTH and CT （P〉0.05）; compared with control group, IGF-I in treatment group 1 was decreased, and increased in the phytase groups. Under the conditions of this experiment, we found that the ADG of broiler was improved after adding new heat-resistant phytase with low P diets, and F/G was decreased. The effects of two phytases on physiological and biochemical parameters in serum had no significant difference.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
2013年第4期570-576,共7页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
基金
生态环保饲料生产关键技术研发与集成示范(2011BAD26B03)
关键词
肉仔鸡
植酸酶
生长性能
生理生化指标
broiler chickens
phytase
growth performance
physiological and biochemical parameters
作者简介
张现玲（1985-），女，石家庄赞皇人，硕士，主要从事饲料加工与营养的研究，E-mail：664907932@qq．com
通信作者：于会民，博士，副研究员，主要从事饲料与养殖产品安全、健康养殖研究工作，E-mail：yuhuimin@mail．caas．cn
