大中型密闭式鸡舍环境分析

就10年间对北京市9座大、中型鸡场密闭式鸡舍环境测定材料进行了环境分析。舍内平均温度春、秋、冬三季比较适宜,夏季未超过鸡的临界温度高限,相对湿度通常在50～70%;夏季有些鸡舍风速偏低与通风量不足有关;冬季如间断通风,有时氨的浓度可能超过20ppm;光照强度普遍可以满足产蛋需要。文中介绍了密闭式鸡舍的优越性,并提出了一些有关环境管理的改进意见。

ANALYSIS OF THE ENVIRONMENTAL CONDITIONS ON WINDOWLESS CHICKEN HOUSES

The environmental factors of windowless house on nine large and medium poultry farms were measured in Beijing during last 10 years.The mean pen temperature satisfied the adult fowls need in spring,autumn or winter and was not over the upper critical temperature in summer.The relative humidity range was 50-70%.The air velocity was slower in some farms where ventilation rate was not enough during hot season.The ammonia content could exceed 20 ppm in some case when ventilation was paused in winter.The light in...