Reactions of the Dairy Cow to Changes in Environmental Temperature

Application of principles of heat exchangers in dairy barn ventilation

“…Began and Richardson (28) found that production decreased as bam Sioce the pipes In this unit were made up of 10 ft.…”

Application of principles of heat exchangers in dairy barn ventilation

“…Bichardson (28) observe that this amounts to about one pound per hour for Jersey cows at However Began and Preeborn (27) than at 77® F and that the extra water required for milk production is equal to that amount contained in the milk.…”

“…egan and Hlctiardson (28) show that for every Increase In environmental temperaturo of 18** F tihov© 40® the respiration rate of cattle is doubled. Oaslaas (12) in his work did not find es rapid an increese In the rate above 52°F, Seath and Killer (31) in their studies with dairy cows at high tesperatures noted that Holsteins showed a greater Increase In rate per degree rise in tesperature than Jerseys* FroR these Ren*s investigations corves have been plotted in Fig, 1 to show the rate of respi ration at varying environmental tmperatures.…”

“…Began and Richardson (28) found that production decreased as bam in a ventilation system* They recommend that the fans should be located near the ceiling and that it is optional whether the air be removed from the ceiling or from near the floor throu^a flue* It is suggested that it might be desirable to reciove the air at the celling because theTO Is a greater accumulation of moisture at the ceiling than at the floorso much greater that for each unit of heat lost throu^ex haust from near the ceiling, more moisture is driven out than for a similar heat loss through air taken from near the floor. King (18) Sioce the pipes In this unit were made up of 10 ft.…”

Refinements in heat exchangers for the ventilation of animal shelters

“…Regan and Richardson (20) found that the respiration rate of cattle doubled for every lb®F rise in temperature above 40®, Gaalaas (7) did not find as rapid an Increase above 50®…”