混合通风方式下大型肉鸡舍过渡期通风效果测试

随着肉鸡周年饲养环境控制精细化程度的提高，在横向通风和纵向通风系统应用的基础上，借助于横向进风口和纵向排风机进行春秋过渡期通风换气的混合通风方式，近年来在大型养鸡场内开始应用。该研究通过现场试验，研究测试了这种通风方式下肉鸡舍内的换气量、气流速度、温度以及氨气浓度，结果显示这种通风方式可以保证充足的换气量，提供适宜且分布均匀的气流速度和温度分布，有效地抑制舍内氨气浓度，从而可为鸡只的健康生长创造良好的环境条件。

Ventilation effect of a large-scale broiler house applied with mixed ventilation during seasonal transitions

As the development of environmental control technologies in poultry houses, a mixed ventilation by using the air inlets in the sidewalls and the exhaust fans installed in the gable-walls was created and has been applied in large-scale broiler buildings during the seasonal transition periods. In this article, field measurements were conducted in a broiler house with mixed ventilation, and the parameters of air exchange rate, air velocity, indoor and outdoor temperatures as well as ammonia concentration were experimentally studied. The results indicate the air exchange rate is sufficient in this building. Air velocities and indoor temperatures inside this building are appropriate and their distributions are uniform; furthermore, inside ammonia concentration can be controlled at a low level. This paper suggests that a broiler building applied with a mixed ventilation system can provide the birds with a good growing environment.