维生素B_6对1～21日龄北京鸭生产性能的影响

Effects of Vitamin on growth performance in pekin ducks aged from 1 to 21 days

本试验采用单因子完全随机试验设计研究维生素B6对1～21日龄雄性北京鸭生产性能的影响,进而探讨1～21日龄北京鸭维生素B6需要量。试验设7个维生素B6添加水平（0、0.66、1.32、1.98、2.64、3.30、3.96 mg/kg）,维生素B6添加形式为盐酸吡哆醇。336只1日龄雄性北京鸭随机分为7组,每组8个重复,每重复6只,饲养至21日龄。试验结果表明,维生素B6缺乏会显著抑制肉鸭生长,随维生素B6添加水平升高,北京鸭日增重显著增加（P〈0.05）,而采食量和料重比未发生显著变化（P＞0.05）。以日增重为评价指标,依据折线模型,1～21日龄北京鸭维生素B6适宜添加量为1.24 mg/kg。当考虑到基础日粮中维生素B6含量时,1～21日龄北京鸭维生素B6总需要量为3.17 mg/kg。

An completely randomized one-factorial experiment was conducted to determine the effects of vitamin B6 on growth performance of White Pekin ducks from 1 to 21 d of age and to estimate vitamin B6 requirement of these birds during this period.Seven supplemental vitamin B6levels（0,0.66,1.32,1.98,2.64,3.30,3.96 mg/kg）were used and pyridoxine hydrochloride was used as vitamin B6 source. A total of 336 one-day-old male White Pekin ducks were divided into7 experimental treatments and each treatment contained 8 replicate pens with 6 birds per pen.These birds were raised from1 to 21 d of age.In this study,vitamin B6 deficiency could reduce duck growth markedly and the daily weight gain increased significantly with the increase of supplemental vitamin B6 level（P〈0.05）,but feed intake and feed/gain did not change significantly（P〉0.05）.According to broken-line regression,the supplemental vitamin B6 requirement of Pekin ducks from 1 to 21 days of age was 1.24 mg/kg for optimum weight gain.Considering the vitamin in basal diets,total vitamin B6 requirement for the birds during this period was 3.17 mg/kg.