Süt Sığırlarında Sıcak Stresinin Tespiti, Verim Özellikleri Üzerine Etkileri ve Korunma Yöntemleri.

Heat stress is effecting both production and functional traits in dairy cattle. Heat stress became a major concern for dairy cattle breeders, as a result of global warming. Effects of heat stres is being felt more especially at intensive cattle farms in Turkey. Dry matter intake decreases under heat stress conditions which is a major factor of decline in milk yield. And also, under the effect of heat stres somatic cell count of milk increases, several diseases becomes more common (mastitis and lameness) and milk quality becomes worse thus it causes direct and indirect costs to breeders. The effects of heat stres becomes more prominent under the conditions of high humidity and ambient temperature because of the less effective evaporative heat loss. Cows are being affected more from heat stres when the night time ambient temperature is high. As a result of current selection programes, dairy cattle will have more milk production, consume more feed and more heavier than today which will result a decrease in heat tolerance. In this review, it is aimed to give knowledge on heat stres and its relationship with production traits and methods to decrease its effects on dairy cattle. [ABSTRACT FROM AUTHOR]