维生素B6对1～4周龄五龙鹅生长性能、屠宰性能及蛋白质代谢的影响

Effects of Vitamin B_6 on Growth Performance,Slaughter Performance and Protein Metabolism of Wulong Geese Aged from 1 to 4 Weeks

本试验通过在鹅饲粮中添加不同水平维生素B6,探索1～4周龄鹅生长性能、屠宰性能及蛋白质代谢的影响,以确定维生素B6的最适宜添加水平.选用1日龄五龙鹅360只,随机分为个6组,每个组6个重复,每个重复10只鹅.Ⅰ～Ⅵ组饲喂在玉米-豆粕型饲粮中分别添加0（对照）、2.5、5.0、10.0、20.0和40.0 mg/kg的维生素B6的试验饲粮.试验期为4周.结果表明：1）饲粮添加维生素B6能显著或者极显著提高1～4周龄鹅平均日增重（P＜0.05或P＜0.01）,有提高1～4周龄鹅平均日采食量的趋势（P=0.064）,降低料重比（P＞0.05）;饲粮维生素B6添加水平为6.16 mg/kg时平均日增重最大.2）与对照组相比,Ⅲ组显著提高了血清总蛋白、白蛋白和球蛋白含量（P＜0.05）.3）肝脏中谷丙转氨酶、谷草转氨酶活性和总游离氨基酸含量与1～4周龄鹅生长性能均有显著相关性（P＜0.05）.由此可知：1）饲粮维生素B6对1～4周龄五龙鹅生长性能和屠宰性能有显著影响.2）饲粮中添加适量维生素B6可提高鹅蛋白质代谢水平,鹅饲粮中维生素B6适宜添加水平为6.16 mg/kg.

This experiment was conducted to study the effects of vitamin B6 on growth performance,slaughter performance and protein metabolism of Wulong geese,and to determine the optimal dietary level of vitamin B6.Three hundred and sixty 1-day-old Wulong geese were selected and randomly divided into 6 groups with 6 replicates in each group and 10 geese in each replicate.Geese in groups Ⅰ to Ⅵ were fed the corn-soybean basal diets supplemented with 0,2.5,5.0,10.0,20.0 and 4,0.0 mg/kg vitamin B6,respectively.The experiment lasted for 4 weeks.The results showed as follows：1） vitamin B6 significantly increased average daily gain of geese aged from 1 to 4 weeks （P＜0.05 or P＜0.01）,and average daily feed intake of geese aged from 1 to 4 weeks had an increased trend （P=0.064）,and reduced feed gain ratio （P＞0.05） ; when the dietary vitamin B6 level was 6.16 mg/kg,the average daily gain reached the highest.2） Compared with the control group,the contents of serum total protein,albumin and globulin in group Ⅲ was significantly increased （P＜0.05）.3） The activities of alanine transaminase,aspartate transaminase and content of total free amino acids in liver had significant correlation with the growth performance （P＜0.05）.In conclusion：1） vitamin B6 has significant influence on growth performance and slaughter performance of Wulong geese aged from 1 to 4 weeks.2） The optimal supplement level of vitamin B6 can increased the protein metabolism level,and the recommended supplemental level of vitamin B6 is 6.16 mg/kg.