بررسي مقايسه اي اثر سطوح مختلف اسيد چرب و پودر چربي بر عملكرد جوجه خروس هاي گوشتي

The comparative study of using different levels of fatty acid and calcium salt of fatty acid on male broiler s performance

An experiment was conducted to compare the effect of using different levels of fatty acid and calcium salt of fatty acid (fat powder) on male broilers performance. A completely randomized design with five treatments and five replications with 16 Ross 308 male chicks for each treatment were used in this experiment. Treatments consisted of control (without fatty acids and fat powder), 3 and 6 percent fatty acid or fat powder. The whole feeding period was devided into starter and grower periods. All diets had the same metabolizable energy and protein level and for other nutrients recommended NRC (1994) was used. The results showed that performance of the chicks in different treatments was significantly different (P<0.05), so that treatment with 6 percent fatty acid provided significantly higher weight gain compare to other treatments (P<0.05). Treatments with 3 and 6 percent fatty acid showed improved feed conversion compared to treatments with 3 and 6 percent fat powder (P<0.05). Adding different levels of fat powder or fatty acid had no significant effect on carcass percentage, thigh percent and liver plus gall bladder percent but using 6 percent fatty acid resulted in higher abdominal fat percent compared to other treatments except control (P< 0.05).