effects of dietary extruded full fat soybean (effsb) on performance, blood metabolites and morphology of intestinal mucosa of broiler chickens

an experiment was conducted to study the effects of dietary levels of extruded full fat soybean (effsb) on performance, blood metabolites and intestinal morphology of broiler chickens. a batch of ffsb was wet extruded at 155 °c, 15 seconds to provide the extruded full fat soybean (effsb) sample. one hundred and forty four d-old ross 308 male broiler chicks were divided into 12 groups with 12 birds each and assigned to starter, grower and finisher diets each containing 0, 7.5 and 15 % of effsb. feed intake of chicks fed diet containing 15% effsb, were significantly reduced as compared to those fed the control diet during 1-14 d of age, but were not influenced during grower, finisher and the whole experimental period. a significant linear decrease was observed in weight gain of birds during whole period. relative weight of pancreas, aspartate aminotransferase, alanine amino transferase, lactate dehydrogenase, and creatine kinase (ck) in blood serum of chicks were not influenced with dietary effsb level. a significant linear decrease was observed in serum triglyceride and total cholesterol with increasing in dietary levels of effsb at 42 d of age. the villi length decreased linearly with increasing dietary levels of effsb in duodenum section of small intestine, causing a significant decrease in villi surface area in duodenum of birds fed 15% effsb diet as comparing to control birds, the crypt depth and villus length/ crypt depth were changed. the morphological measurements of small intestine mucosa in jejunum and ileum sections were not significantly influenced by dietary effsb at 42 d chickens. it is concluded that using full fat soybean extruded at 155 °c up to 15 % of diet did not influence significantly performance of chickens during whole period, although the villi length and villi surface area decreased in duodenum of birds with increase in the usage of effsb.