外源性环核苷酸对蛋鸡生产性能及蛋品质的影响

Effects of Extrinsic CNT on Production and Egg Characters of Layers

选用 4 4周龄健康海兰褐商品蛋鸡 5 0 4只 ,随机分为 7组 ,每组 72只 ,每组内设 3个重复 ,各组均在相同条件下饲养。试验结果表明 :试验组鸡产蛋量均显著高于对照组 ,分别提高 6 16、3 5 3、3 4 9、4 0 7、4 82和 9 83个百分点 ,差异显著 (p <0 0 5 ) ;饲料转化率分别提高 7 72 %、4 4 0 %、4 4 0 %、7 2 3%、6 2 7%和 8 2 2 % ;与对照组相比较 ,第 1组蛋壳厚度提高 5 5 6 % ,其它各试验组均提高 2 78% (p <0 0 5 ) ;破软蛋率分别降低 1 33、0 81、1 15、0 96、0 98和 1 0 0个百分点 ,但差异均不显著 (p >0 0 5 )。试验各组的平均蛋重、蛋比重、蛋形指数、哈氏单位及蛋白、蛋黄百分率与对照组相比组间差异均不显著 (p >0 0 5 )。试验结束时 ,1～ 6组每只鸡分别比对照组增收 0 89、0 35、0 2 5、0 73、0 6 1和 0

week_old Hy_line layers were randomly divided into seven groups (72 layers,3 replications in each group)and fed on the same condition.The results showed that the egg production in treatment groups 1 to 6 was higher compared with the CK and increased 6.16,3.53,3.49,4.07%, 4.8 and 9.83 percent respectively,differences between treatments and the CK were significant(p< 0.05 ).It also showed that the utilization ratio of ration increased 7 72%,4 40%,4 40%,7 23%, 6 27 % and 8 22% (p<0.05).egg shell thickness increased 5.56% in group 1,and increated 2.78 % in other treatment groups,(p<0.05).cracked and soft egg ratio reduced 1.33,0.81,1 15, 0 96 ,0 98 and 1.00 percent respectively. The results also indicated that differences of average egg weight,egg specific gravity ,egg shell index,half unit,percentage of albumen and vitelline between treatment groups and the CK were not significant;average income of each layer in treatment groups increased 0.89 ,0 35,0 25,0 73,0 61 and 0 97 $ respectively.