Abstract
BackgroundRice bran is a by-product of the rice-milling process, which remains largely underutilized; however, efficient processing treatments may improve its feeding value for chickens. This is of great economic and environmental importance, as this can lower the production costs, and offer an opportunity for valorization of a low-quality agricultural by-product, to a high-value feed source.MethodsThis experiment was conducted to study the effect of extruded rice bran on performance and phosphorous (P) bioavailability in broiler chickens. In a completely randomized design, 200 seven-day-old broilers (Cobb 500) were allotted to five treatments with five replicates per treatment and 8 chicks per replicate, and fed with their respective diet during the starter (8 to 21 days) and grower (22 to 42 days) periods. Diets were a basal corn-soybean based diet (T1), or diets containing 20 % rice bran (T2), 30 % rice bran (T3), 20 % extruded rice bran (T4), or 30 % extruded rice bran (T5).ResultsBirds feeding on T4 and T5 diets had a higher body weight gain and lower feed-to-gain ratio compared to those feeding on T2 and T3 diets (p < 0.05). Birds receiving diets containing extruded rice bran had higher total P availability and tibia ash content, as compared with those receiving diets containing un-extruded rice bran (p < 0.05). Relative weight of the pancreas was higher in birds receiving T2 and T3 diets.ConclusionsThe results confirmed the beneficial effect of extrusion treatment of rice bran on performance and P availability in broilers. Up to 30 % extruded rice bran may be included in the broiler diet without apparent adverse effects on the performance.
Highlights
Rice bran is a by-product of the rice-milling process, which remains largely underutilized; efficient processing treatments may improve its feeding value for chickens
90 % of P in rice bran is in the form of phytic acid and phytate chelated with other elements; phytate does reduce P availability, and decreases the absorption of elements such as zinc, iron, calcium and magnesium [11]
Birds feeding on the diets containing un-extruded rice bran had a significantly lower body weight gain compared to those on the control diet (T1), T4 and T5 diets
Summary
Rice bran is a by-product of the rice-milling process, which remains largely underutilized; efficient processing treatments may improve its feeding value for chickens. An important by-product of the rice milling industry, has the potential to be used as an alternative to grains in the poultry diet [1] It contains 15 − 22 % oil, 11 − 17 % protein, 6 − 14 % fiber, 10 − 15 % moisture, and 8 − 17 % ash [2]; the presence of anti-nutritional factors such as phytic acid [3], trypsin inhibitor and hemagglutinin [4], high fiber content [5], and instability during storage [6] limit its use in poultry nutrition. It is necessary to stabilize the rice bran by effective pretreatments to limit the
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
