环境因子对蛋鸡生产性能的影响

本文研究了春季蛋鸡舍空气环境因素对伊莎蛋鸡生产性能的影响。结果表明，各层笼温差较大，下层比中、上层低1.5～3.0℃；上、中层与下层的产蛋率存在极显著差异(P<0.01)。而中、上层间差异不显著(P>0.05)。1～3层昼夜光照强度差异大；白天光照强烈，且不均匀，南北两列差异极显著(P<0.01)。南列平均值为204.8Lx，北列仅为21.1Lx，是南列出现啄癖多、死淘率高的一个重要原因。相对湿度平均66.7%，在适宜范围之内。舍内平均风速小，仅0.048±0.019m/s；NH

Study on the Effect ofEnvironmental Factors on the Productivity in Layers

The effect of environmental air factor in the laying house on the productivity of layers in spring was studied in this paper. The results showed that there were comparatively large differences in temperature between the cages on all layers, and it was Lower by 1.5～3.0℃ in the cages of lower layers than in the cayes of middle and upper layers; The difference of laying rate in middle and upper layers was highly significant (P<0.01), but it was not significant (P>0.05) between the two layers; There were great differences between 1 to 3 layers in the illiumination of the day and night, it was strong and uneven in the day time. The illumination difference between south row and the north was significant (P<0.01), The average was 204.8 Lx in south row, and only 21.1 Lx in the north. That was an important cause of many pecking proclivities and high death rate; The average wind velocity in laying house was only 0.048±0.019 m/s; The concentration of NH３ and CO２ were 27.9 mg/m３ and 0.08% respectively, which exceed the hygien standard. The concentration of NH３ affected negatively the laying rate (P<0.01) by the relation and regression analysis.