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This study investigated the effect of different dietary levels of defatted rice bran (DFRB) on growth performance, slaughter performance, and relative weights of the viscera in geese. A total of 300 28-day-old healthy male Yangzhou goslings with similar body weights were randomly divided into five groups, with six replicates per group and 10 geese per replicate. The geese were fed diets containing 0%, 10%, 20%, 30%, or 40% DFRB for 42 days. Over the 29-d to 70-d trial period, no significant difference was observed in the average daily feed intake in geese ( p &gt; 0.05). However, 30% and 40% DFRB reduced body weights of geese at 70 d ( p &lt; 0.01) and average daily gain from 28 d to 70 d ( p &lt; 0.05) were observed, and 20%, 30%, and 40% DFRB increased feed-to-gain ratios from 28 d to 70 d ( p &lt; 0.01). Birds in the 30% and 40% DFRB groups had reduced breast yields ( p &lt; 0.05), and birds in the 40% DFRB group had increased thigh yields ( p &lt; 0.05). Birds in the 20%, 30%, and 40% DFRB groups had increased proventriculus weights ( p &lt; 0.01). The results suggested that a high level of DFRB affected growth performance, slaughter performance, and visceral development. Under the experimental conditions, we recommend that the dietary level of DFRB should not exceed 20% to avoid negative effects on geese.

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The Effect of Different Dietary Levels of Defatted Rice Bran on Growth Performance, Slaughter Performance, Serum Biochemical Parameters, and Relative Weights of the Viscera in Geese