مقال بحثي وصول مفتوح
Effect of Hot and Humid Conditions on Cortisol Levels m Lactating Dairy Cows
Fourteen lactating, non-pregnant Holstein cows were heat synchronized for estrus and assigned randomly to pens in a free stall barn with (Fan) or without (Control) a fan to observe the effect of forced ventilation on cortisol concentrations. After a 21-day adjustment period, Jugular cannulae were inserted for blood sam …