Non Starch Polysaccharides and Broiler Responses

The present study was conducted to investigate the effects of various pectin to cellules ratios on carcass characteristics and visceral organs of broiler chickens. A total of 400 chickens were allocated to 4 treatments, 4 replications and 25 chickens in each at a completely randomize design. Treatments were consisted of control (treatment 1) or diets containing different pectin: cellulose ratios; 2:1 (treatment 2), 1.5:1.5 (treatment 3) and 1:2 (treatment 4), respectively. Carcass weights was significantly decreases at 21 days of age and increases at 42 days of age by treatment 2 (P<0.05). The lowest breast weights was obtained by treatment 4 at 21 days of age (P<0.05). The lowest and highest thighs weights were related to treatment 3 and 4 at 42 days of age, respectively (P<0.05). All treatments convinced a significant decreases in backside and neck weights rather than control at 21 and 42 days of age (P<0.05). A significantly decreases in wing weights were observed by treatments 3 and 4 rather than control and treatment 2 at 42 days of age (P<0.05). Treatments 2 and 3 induced a significant decreases and increases in intestinal weights at 21 and 42 days of age, respectively (P<0.05). A significant decrease in liver, heart and abdominal fat weighs were prompted by all treatment rather than control at 21 days of age (P<0.05) as well as abdominal fat weighs at 42 days of age (P<0.05). Treatments 4 and 2 tempt the lowest and highest proventriculus weights at 42 days of age, respectively (P<0.05). The greatest and lowest gizzard weights were shown by treatments 2 and 4 at 42 days of age, respectively (P<0.05). A significantly increases in liver weights and a significantly decreases in heart weights were obtained by Treatment 2 and all NSPs treatments rather than control, respectively (P<0.05). The results of current study have shown that various changes arise in physicochemical conditions of gastrointestinal tract (GIT) due to soluble and insoluble fibers interactions reflected to external (carcass traits) and internal (visceral organs) adaptations to alleviate fibers effects. Moreover, it is concluded that using of fibers in diet reduces fat depots and can manipulate to produce lean broilers.