大气氨及环境高温对蛋鸡的热损失与呼吸形式的影响

POULTRY ENERGETICS AS INFLUENCED BY AMMONIA AND TEMPERATURE

摘要: 将白莱克亨蛋鸡分别受10ppm和60ppm大气氨作用30天后,放入含有5ppm大气氨的环境下恢复7天,然后将其放人环境空气温度分别为25℃、29℃、30℃和37℃的直接测热室内,测得其热损失及呼吸频率等数据。实验结果表明,受60ppm大气氨作用和受10ppm大气氨作用的蛋鸡,具有相似的潜热损失率。鸡的潜热损失随着环境温度的升高、呼吸频率的加快而增大。对于给定的环境温度,呼吸频率的变化对潜热损失没有明显的影响。

Abstract: No decrease in efficiency of evaporative heat loss was indicated for 60 ppm ammobia-exposed hens compared to 10 ppm ammonia-exposed hens. Latent heat loss of the nirds increased with increasing. environmental temperature and the associated increasr in respiratory rate. Interestingly, changes in respiratory rate within a given temperature were not correlated with changes in evaporative heat loss.