Abstract
The aim of this research work is evaluate effect of supplementation different levels of fumaric acid at two different times on productive performance and several serum biochemical parameters in broiler chickens. A total of 360 (day-old) chicks were used for 35 days. Chicks were randomly distributed among five treatments, each treatment included three replicates (24 chicks /replicate). Experimental treatments included fumaric acid 0, 1, 1.5 g / kg feed, which was presented to the birds in two stages, the first at the age of 10 days, the second at the age of 20 days in the diet. The results showed that the treatments added to fumaric recorded a significant increase in body weight, weight gain, and the amount of feed ingested. And there were no significant differences in the feed conversion factor, and the biochemical parameters showed that fumaric intake reduces glucose, triglycerides and cholesterol in the blood of birds. It did not show an effect of the time of addition.
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