Effect of olive leaf and Coriander seed (Coriandrum sativum L.) supplementation on performance, intestinal morphology and nutrient digestibility in dite of broiler chickens

Abstract This study was conducted to investigate the effect of adding olive leaf (OL) and coriander seeds (CS) powder to the diet on performance, jejunum morphology and nutrient digestibility of broiler chickens. Seven hundred and twenty Cobb 500 broilers (mixed sex) were randomly distributed to 36 experimental units and 12 dietary treatments (3 replicates with 20 birds in each). The completely randomized design with factorial arrangement 4×3 with 4 levels of OL (0, 2, 2.5 and 3 percent of diet) and 3 levels of CS (0, 0.3 and 0.6 percent of diet) were used. The results showed that the simultaneous consumption of olive leaf and coriander seeds did not have a significant effect on the performance of broilers.. Broilers that received OL with CS had significantly higher crypt depth, villus length, width and surface area than control treatments. Broilers that used OL and CS simultaneously showed higher digestibility of protein and fat. According to the results of this study, although the use of OL and CS did not have a significant effect on weight gain, feed intake and FCR, may be recommended for improvement of small intestinal morphology indices and increased digestibility of lipid and protein.