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Precisely controlled temperature variations: effect on hematocrit values of broiler and laying stock.

An investigation was carried out to study the effect of several controlled environmental temperatures (4.4, 12.7, 23.9, and 32.2 C) on hematocrit values of broiler and laying stock reared from 10 to 20 weeks of age. There were no significant differences between the hematocrit values of broiler stock reared under the various temperature variations. Values for laying stock reared at 12.7 and 23.9 C were significantly lower than values observed for birds reared at control (ambient), 4.4, or 32.2 C temperatures.