insoluble fibers affected the performance, carcass characteristics and serum lipid of broiler chickens fed wheat-based diet

The current study was conducted to survey the influences of addition of alfalfa meal (am), rice bran (rb) and wood shaving (ws) in wheat-based diets [contain soluble non starch polysaccharides (nsp)] on per-formance carcass characteristic and serum lipids of broilers from 11 to 42 d of age. seven hundreds 10-d-old male ross 308 chicks were placed into 35 pens and allocated to seven wheat-soybean meal-based die-tary treatments which were a control (ct) diet (without any fiber source) and six fiber-included diets con-sisting of three sources of fiber (am, rb and ws) and two levels of fiber inclusion (3 and 6%) in a 3 × 2 factorial arrangement. according to the results, the average daily gain (adg), average daily feed intake (adfi), feed conversion ratio (fcr), corrected-fcr (c-fcr) and crop, proventriculus, gizzard (relative full weights) and heart, abdominal fat, liver, breast and thigh (relative weights) and serum low density lipo-protein (ldl) were affected by different types of fibers (p<0.05). the inclusion of insoluble fibers in wheat-based diet improved adg and fcr in broilers, so that, the highest amount of adg and the lowest amount of c-fcr was related to 3% ws contained diet (p<0.05). the highest amount of gizzard weight was depended to 6% ws contained diet (p<0.05) and the lowest breast and thigh weight were also related to rb diets (p<0.05), but the aforementioned treatments had no effect on the different intestine sections weight (p>0.05). in general, the inclusion of 3 to 6% insoluble fibers, except for 6% ws, in wheat-based diet improved growth performance in broiler chickens.