改良型益生素（协力-3000）对蛋鸡生产性能的影响

Effect of Improved Probiotic（Unite Efforts- 3000）on the Productivity of Laying Hens

本试验在曲周县某鸡场，选用180日龄的海蓝灰商品蛋鸡，随机分为两组，试验组的日粮在对照组日粮的基础上添加协力-3000。通过28d的饲养试验结果表明，相对于对照组而言，试验组蛋重提高了3．15％，料蛋比、破蛋率和死亡率分别降低8．37％、8．39％和0．05％，获得了较好的生产性能和经济效益。

The experiment was carried out in a chicken farm of Quzhou county in Handan city. Laying hens of 180d Hy - Line Variety Grayer were divided into two groups at random（ the trial group and the contrast group）, the trial group was given the feeding stuffs with Unite Efforts - 3000, the contrast group was given the feeding stuffs without Unite Efforts -3000. The results： after 28d raising, the trial group was 3.15% higher than the contrast group at egg mass, 8.37%, 8.39% and 0.05% lower than the contrast group at feed/egg ratio, egg broken ratio and mortality ratio, better productivity and economy benefit were got by the trial group.