在不同气温下育雏的雏鸡的热偏好。

Thermal preferences of chicks brooded at different air temperatures.

Alsam H, Wathes C M

Department of Animal Husbandry, University of Bristol, Langford, England.

Br Poult Sci. 1991 Dec;32(5):917-27. doi: 10.1080/00071669108417418.

Abstract

The thermal preferences of small flocks of 400 chicks brooded under radiant heaters were determined at air temperatures of 21, 24 and 27 degrees C from observations of behavioural thermoregulation. 2. At 1 d of age the upper limits of the preferred black bulb temperature increased with air temperature. Preferences for radiant temperature declined with air temperature. 3. Compensation for cold air temperature was imperfect because the chicks avoided zones of high radiant flux. The maximum tolerable radiant temperature was approximately 50 degrees C. 4. Radiant heaters are preferable to convectors in poultry husbandry because the inherent lack of spatial homogeneity in thermal environments ensures that chicks can satisfy their individual thermal preferences.

摘要

通过对行为体温调节的观察，确定了在21、24和27摄氏度气温下，在辐射加热器下育雏的400只小鸡小群体的热偏好。2. 1日龄时，偏好的黑球温度上限随气温升高而增加。对辐射温度的偏好随气温下降。3. 对冷空气温度的补偿并不完美，因为小鸡会避开高辐射通量区域。可耐受的最高辐射温度约为50摄氏度。4. 在家禽饲养中，辐射加热器比对流加热器更可取，因为热环境中固有的空间不均匀性确保小鸡能够满足它们各自的热偏好。