ENVIRONMENTAL EFFECTS ON THERMOREGULATION RESPONSE OF FRIESIEN HOLSTEIN (FH) IN KAMPAR AND DUMAI

Friesien Holstein (FH) is a temperate dairy cattle and sensitive with high temperature and humidity. Climate is one of factors which affected performance and thermoregulation response in livestock. Heat stress in diary cattles were indicated by the increasing of heart rate, respiration rate,and body temperature. The objective of this research was analyze environmental effect on thermoregulation of Friesien Holstein (FH) which maintenance in two lowland areas (Kampar : 01°25 North Latitude - 00°20South Latitude and Dumai : 01°24°23 North Latitude). Variables observed consist of : microclimate on the stall (environment temperature, relative humidity, Temperature Humadity Index (THI), winds velocity) and thermoregulation response. Based on the research, its confirmed that environtmental condition in lowland area were high and affected dairy cattle in heat stress condition (moderate and low heat stress). Environment factors affected thermoregulation response in Friesien Holstein in Kampar andDumai. Heart rate and rectal temperature of FH in Kampar and Dumai were in normal ranges. The increasing of environment temperatures affected livestocks to dissipate more heats by increasing respiration rate, high temperature of the skin as a result of cattle exposed to direct heat temperature

Keywords:

Environtments , Friesien Holstein (Fh) , Response Termoregulation