日粮能量水平对文昌鸡生产性能的影响

Effect of Different Energy Diet on Production Perfromance of Wenchang Chicken

选择刚出雏健康文昌鸡900只(公母各半),随机分为3组:低能组(Ⅰ组),对照组(Ⅱ组)、和高能组(Ⅲ组),每组设5个重复,每个重复30只。试验分为0～2周龄、3～8周龄、9～14周龄3个阶段。试验结果表明:0～2周龄母鸡降低能量水平可以提高日增重和降低料肉比,在Ⅰ组和Ⅲ组间差异显著(P<0.05),3～14周龄母鸡各组间日增重和料肉比差异不显著(P>0.05);0～2周龄公鸡提高能量水平可以提高日增重和降低料肉比,且Ⅰ组与Ⅱ、Ⅲ组间差异显著(P<0.05),3～8周龄公鸡Ⅱ组日增重和料肉比显著优于Ⅰ组和Ⅲ组(P<0.05),9～14周龄公鸡Ⅰ组日增重和料肉比显著优于Ⅱ组和Ⅲ组(P<0.05);能量水平对母鸡腿肌率影响显著。推荐文昌鸡0～2周龄代谢能需要量为11.50～12.12MJ/kg;3～8周为11.70MJ/kg;9～14周为10.70～11.87MJ/kg。

Nine hundred Wenchang chicken （0 weeks old）were randomly divided into 3 groups：low energy（Group Ⅰ ）,control （Group Ⅱ ）and high energy （Group m）,5 replicates each group,30 chickens eaeh replication. The study was divided into 3 periods,0 to 2 weeks age （period 1）,3 to 8 weeks age （period 2）,9 to 14 weeks age （period 3）. The results showed that there were significant improvcment of Group Ⅰ in Wenchang hen on feed/gain and daily gain in period 1,and feed/gain and daily gain were decreased with energy level increasing （P〈0.05）. There were no significant difference in Wenchang hen on feed/gain and daily gain at 3 to 14 weeks age （P〉0.05）. There were significant improvement of GroupⅡ, Ⅲ in Wenchang cock on feed/gain and daily gain during 0 to 2 weeks （P〈0.05）,and feed/gain and daily gain were increased with energy level increasing;There were significant improvement of Group Ⅱ in Wenchang cock on teed/gain and daily gain at period 2 （P〉0.05）;There were significant improvement of Group Ⅰ in Wenchang cock on feed/gain and daily gain at period 3 （P〉0.05）. The effect of energe level on percentage of leg muscle in hen was significant;ME requirements of Wenchang chicken in period 1,2,3 were respectively recommended as 11.50 to 12.12MJ/kg, 11.70 MJ/kg, 10.70 to 11.87 MJ/kg.