The Effects of mixed fat in broiler rations on the performance and some blood parameters in summer seasons

-II- THE EFFECTS OF MIXED FAT IN BROILER RATIONS ON THE PERFORMANCE AND SOME BLOOD PARAMETERS IN SUMMER SEASONS ABSTRACT This research has been carried out to determine the effects of rations with different fat origins and levels on live weight, live weight gain, feed consumption, feed conversion ratio, carcass composition and some blood parameters of broilers in summer seasons. Besides, indoor temperature and relative humudity values of poultry house have also been measured weekly in order to determine their possible effects on feed consumption and broiler performance. When overall performance of the broilers regarding fat origins within first six weeks is assessed, it is found that there is a significant difference between ration groups for live weight, live weight gain and feed conversion ratio values (P <0,01)When assessed regarding fat levels, there is no significant difference (P>0.05). When dry matter, crude ash, crude protein and crude fat values in carcass is considered, fat origins and levels, and sex have no effect on them (P>0.05). In the statistical analysis for cholesterol, triglyceride, HDL and LDL in blood, various results are found. KEY WORDS: Broiler, Vegetable oil, Tallow, Performance, Blood parameters