The Effect of Heat Stress on Milk Yield, Milk Fat Rate and Rectal Temperature in Holstein-Friesian Dairy Cattle

Authors : Mustafa KİBAR, Galip BAKIR, Ayhan YILMAZ

Pages : 183-188

View : 51 | Download : 21

Publication Date : 2020-12-25

Article Type : Research Paper

Abstract :Heat stress is an environmental factor that negatively affects the morphological and physiological properties of dairy cattle. The aim of this study is to investigate the relationship between heat stress and milk yield, milk fat ratio and body temperature in Holstein-Friesian dairy cattle. The data of the study was obtained from a private Kurtalan Farm of Siirt province, the Southeastern Anatolia Region of Turkey. Milk yield and other traits of 13 head Holstein-Friesian dairy cattle were recorded in March, April, May, June, July, August and September. In addition, temperature and humidity records were recorded in the farm and in the parlor to be used for calculating the temperature humidity index value. In the analysis of data, correlation and regression methods were used. As a result of the study, the negative correlation insert ignore into journalissuearticles values(P<0.01); was found between milk yield and milk fat ratio and the positive correlation insert ignore into journalissuearticles values(P<0.001); were detected between heat stress and body temperature. In addition, a significant negative relationship was observed between rectal temperature and milk yield insert ignore into journalissuearticles values(P<0.01);.
Keywords : Heat stress, Holstein Friesian, Milk yield and content, Rectal temperature

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