Ernst R A, Weathers W W, Smith J
Poult Sci. 1984 Sep;63(9):1719-21. doi: 10.3382/ps.0631719.
Short-term heat stress can occur when chicks are transported from the hatchery to growing facilities. Two experiments were conducted to determine the possible effects of short-term heat stress on growth and feed conversion of broiler (Hubbard X Hubbard) chicks. The heat stress was accomplished by placing chicks in Jamesway 252 incubators at dry bulb temperatures ranging from 40 to 45 C for variable times. Growth, feed consumption, and mortality were measured for 16 days following the heat stress. Short sublethal heat stress significantly reduced growth rate to 16 days in these experiments without any effect on feed conversion ratio. The results indicate that the hatchery industry should avoid overheating chicks even for periods as short as 1 hr.
当雏鸡从孵化场运输到生长设施时，可能会发生短期热应激。进行了两项实验，以确定短期热应激对肉鸡（哈伯德×哈伯德）雏鸡生长和饲料转化率的可能影响。通过将雏鸡置于干球温度为40至45摄氏度的詹姆斯韦252型孵化器中不同时间来实现热应激。在热应激后的16天内测量生长、饲料消耗和死亡率。在这些实验中，短时间的亚致死热应激显著降低了至16日龄时的生长速率，但对饲料转化率没有任何影响。结果表明，孵化行业应避免雏鸡过热，即使是短至1小时的时间段。
