Volume 8, Issue 16 (11-2017)                   rap 2017, 8(16): 47-54 | Back to browse issues page


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Rice hulls Application as an Insoluble Dietary Fiber Source in Broilers Diets. rap. 2017; 8 (16) :47-54
URL: http://rap.sanru.ac.ir/article-1-803-en.html
Abstract:   (482 Views)
The experiment was carried out using 200 Ross 308 broiler chickens in a completely randomized design with 5 treatment and 4 replicates. The experimental diets were consisted of a control free hulls diet and four diets containing 0.75 or 1.5 percent rice hulls with particle sizes of less than 1 mm or between 1-2 mm.  The performance traits were determined through 42 d experimental period and carcass traits were expressed as a ratio of live weight.  The digestibility coefficients of nutrients of the experimental diets were also determined. At grower phase, the diets contained 1.5% rice hulls regardless of their particle size, improved weight gain compared to the group fed the diets with 0.75% rice hulls (P<0.05). The experimental diets did not affect feed intake of broilers. The feed conversion ratio in group fed the diet contained 0.75% rice hulls with 1-2 mm particle size was lower than the group fed the diet contained 0.75% rice hulls with particle size of less than 1 mm (P<0.05). Gizzard weight in chickens fed the diet contained 1.5% rice hulls with particle size of 1-2 mm was increased and the observed difference with the group fed the diet contained 0.75% rice hulls with particle size of less than 1 mm was significant (P<0.05). The digestibility coefficients for dry matter, ash and crude fat improved in the diet contained 0.75% rice hulls with particle size of 1-2 mm and the difference with the control diet was significant (P<0.05). The results of the present study suggest that including rice hulls with 1-2 mm particle size at 0.75% of the diet could positively affect performance traits and feed cost of broiler chickens.
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Type of Study: Research | Subject: Special

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