Özet:

Aims: In this study, in addition to determining and mapping the distribution of Temperature-Humidity Index (THI) values indicating heat stress in Hatay provincial center and districts, it is aimed to inform about the applications that will reduce the effects of this situation for areas with heat stress. Methods and Results: Temperature-Humidity Index (THI) values were calculated using the average monthly temperature and humidity values taken from weather stations. The distribution of the resulting THI values in Hatay province is mapped using the interpolation feature of the ArcMap program. Conclusions: When the average THI values calculated for the districts of Hatay province were taken into consideration, it was observed that the heat stress limit value was exceeded in summer months in Antakya, İskenderun, Samandağ, Arsuz, Kırıkhan and Dörtyol districts of the province and around. Especially in July and August, it was determined that the limit value was exceeded and even exceeded dangerous limits in all districts except Yayladağ. Therefore, it has been concluded that it is necessary to use the measures to prevent heat stress in enterprises of dairy cattle breeding in all districts except Yayladağ (such as shading, sprinkling, fanning, evaporative cooling, ration composition adjustment, cold and good quality drinking water supply, change of feeding times, rescheduling of barn applications) and to include them in projects during the planning phase. Significance and Impact of the Study: Heat stress is considered the primary factor that reduces milk production in dairy cattle, and as a result causes serious economic losses for livestock farmers worldwide. Heat stress not only reduces milk production, but also affects the quality of milk by changing various components of milk. Therefore, it is an important issue to check the heat stress situation in enterprises and to apply their precautions carefully.

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