Document Type : Research Paper
Authors
1 Animal Science department, Faculty of Agriculture, Lorestan University, Khorramabad, Iran
2 Department of Animal Science, Faculty of Agriculture, University of Lorestan, Khorramaabad, Iran
Abstract
Effects of dietary inclusion of rice bran on production performance, carcass characteristics, ileal digestibility of nutrients and some blood parameters were studied using 240 day-old (mixture of male and female chickens) Ross broiler chicken which assigned in a completely randomized design to four treatments with five replicates of 12 birds each. The experimental treatments included control diet and diets containing 2.5, five and 7.5% of rice bran. The results of this study showed that although dietary inclusion of rice bran for all inclusion levels resulted in significant reduction (P<0.05) in feed consumption and daily gain in starter, grower and entire rearing period, it had no undesirable effects on feed conversion ratio and production efficiency index for the entire rearing period. Even though the addition of rice bran at level of 5% caused significant increase (P<0.05) in relative weight of duodenum and ileum in comparison with control group, this increase did not lead to improved digestibility of nutrient. Dietary inclusion of rice bran linearly increased the relative weight of liver (P<0.05), but the relative weight of Bursa of Fabricius in chicks fed diets containing rice bran was not significantly different with that of in control birds (P>0.05). Feeding chicks with diets containing 7.5% rice bran significantly elevatedserum concentration of glucose compared with those fed diets containing 2.5 and 5% rice bran (P<0.05). Dietary inclusion of rice bran linearly increased serum concentrations of cholesterol and VLDL in broiler chicks (P<0.05). The results of current study showed that dietary inclusion of raw rice bran without any processing in the diet of broiler chickens is not appropriate.
Keywords
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