We study the microclimate in an uninsulated barn, with the Holstein breed kept all year round. It is important for us to know what temperatures for animals are comfortable. We will be grateful for references to similar studies
Cows do not need to spend energy in the comfort range of 5 to 24 ° C to maintain their natural body temperature. Generally, for each degree of temperature reduction, the digestibility of the diet is reduced by 1%. That is, by lowering the temperature below the critical temperature level، the need for more feed is needed. Interestingly, in the case of cold stress, energy requirements increase, but the need for protein for livestock remain constant.
Dear friend, I am grateful for your response. Most domestic scientists also tend to regard the limits from 5 to 20 ° C as comfortable for dairy cattle. However, modern high-yielding rocks have their biological characteristics, namely, increased heat production. Perhaps this can shift the value of the thermoneutral zone in the direction of lower temperatures. In turn, such cows are more sensitive to high temperatures. Perhaps speaking about the comfort for these animals, in each specific case, one must proceed from the clinical state and the level of productivity.
Most comfort zone for Holstein cow in India is 5 to 35 oC temperature
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