Berrong S L, Washburn K W
Department of Poultry Science, The University of Georgia, Athens 30602-2772, USA.
Poult Sci. 1998 Mar;77(3):379-85. doi: 10.1093/ps/77.3.379.
The effects of heat stress (HS) on total plasma protein (PP) concentrations, body weight gains (BWG), and body temperature (BT) were studied in an Athens-Canadian Randombred (ACRB) population and commercial broilers (BR). The populations were maintained at environmental temperatures of 21, 32, and 38 C from 3 to 6 wk of age. The PP, BWG, and mortality (M) were measured at 3, 4, 5, and 6 wk and BT at 6 wk. After 2 wk of HS, the PP of the birds grown at 38 C was lower than that of birds in the 21 and 32 C environment, but differences for the 21 and 32 C groups were not consistent. The ACRB had significantly lower PP than the BR at 4, 5, and 6 wk. There were no phenotypic correlations between PP and BWG within temperature, line, and sex. The decreased BWG of the BR in response to the HS was much more severe than that of the ACRB. The BT of the ACRB (41.5 C) was significantly lower than that of the BR (41.9 C). Birds grown at 38 and 32 C had a higher BT (42.0 and 41.8 C) than at 21 C (41.3 C). The BR showed an increase in M in both the 38 and 32 C environments, but the M for the ACRB was not affected by environmental temperatures.
在雅典-加拿大随机品系（ACRB）群体和商品肉鸡（BR）中研究了热应激（HS）对总血浆蛋白（PP）浓度、体重增加（BWG）和体温（BT）的影响。这些群体在3至6周龄时分别维持在21、32和38摄氏度的环境温度下。在3、4、5和6周龄时测量PP、BWG和死亡率（M），在6周龄时测量BT。热应激2周后，在38摄氏度环境中生长的鸡的PP低于在21和32摄氏度环境中的鸡，但21和32摄氏度组之间的差异并不一致。在4、5和6周龄时，ACRB的PP显著低于BR。在温度、品系和性别范围内，PP与BWG之间没有表型相关性。商品肉鸡对热应激反应导致的BWG下降比ACRB严重得多。ACRB的体温（41.5摄氏度）显著低于商品肉鸡（41.9摄氏度）。在38和
