The comparative trials were carried out in two henhouses with same poultry density, same ventilation and temperature controlling system.
选取尺寸、样式和饲养密度等完全相同的两栋蛋鸡舍作对比试验，两栋鸡舍通风采用自动控制装置。
2
Disinfecting 6 henhouses with 0.5% Peroxyacetic Acid solution, sampling & determining air ammonia & total microbe level in henhouses before and after disinfecting respectively.