Conducting studies where temperature and humidity are controlled in a circadian manner, in order to mimic natural environmental conditions, has not been conducted. Feed intake and milk yield under natural conditions has resulted in mean THI two days prior to milk production to have the greatest effect on both intake and yield (Collier et al., 1981, West et al., 2003). Unfortunately, because these results were not obtained in controlled environment researchers were unable to quantify the relationship between THI and milk yield.
The goal of this study was to utilize high producing dairy cows and including radiant energy impacts on animal performance. Specific objectives were to determine the effects of minimum, maximum, average THI and the number of hours at a given THI on milk production of high producing dairy cows.
Conducting studies where temperature and humidity are controlled in a circadian manner, in order to mimic natural environmental conditions, has not been conducted. Feed intake and milk yield under natural conditions has resulted in mean THI two days prior to milk production to have the greatest effect on both intake and yield (Collier et al., 1981, West et al., 2003). Unfortunately, because these results were not obtained in controlled environment researchers were unable to quantify the relationship between THI and milk yield.The goal of this study was to utilize high producing dairy cows and including radiant energy impacts on animal performance. Specific objectives were to determine the effects of minimum, maximum, average THI and the number of hours at a given THI on milk production of high producing dairy cows.
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