This study was conducted to investigate the effects of dietary rice brewer waste (RBW) on growth performance, nutrient utilization and nitrogen balance in growing rabbits. Thirty growing rabbits (758 Â± 25.7 g initial body weight) were randomly assigned to control and four treatment groups (containing RBW) in a completely randomized design with six rabbits per group. The study lasted 6 weeks for measurements of feed intake and growth performance followed by a five-day metabolic trial to determine nutrient digestibility and nitrogen balance. The five diets contained RBW at 0% RBW (control group), unsterilized RBW at 10% and 20% and sterilized RBW at 10% and 20% in the concentrates. The average daily body weight gain (ADG) in the 20% unsterilized RBW group was higher (p < 0.01) than the control group. No statistically significant difference (p = 0.089) of ADG was observed for the control vs. the sterilized groups, but the overall ADG was better (p = 0.044) in the unsterilized RBW groups than the sterilized RBW groups. The daily dry matter intake in unsterilized and sterilized RBW groups was higher (p < 0.01) than the control group. However, no difference (p = 0.22) was found between the unsterilized and sterilized RBW. The feed conversion ratio (FCR) was lower for the unsterilized RBW groups vs. the control group (p = 0.041), but there was no difference of FCR in the control vs. sterilized RBW groups (p = 0.37) and the unsterilized RBW groups vs. unsterilized RBW groups (p = 0.14). The digestibility of organic matter, crude protein and crude fibre was greater (p < 0.01) in the unsterilized and sterilized RBW groups than the control group. The nitrogen balance and efficiency of nitrogen utilization were also higher in the unsterilized and sterilized RBW groups than the control group (p < 0.01). The study showed that the dietary RBW could improve growth performance and nutrient utilization in growing rabbits with superior responses for the unsterilized RBW.

中文翻译：

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饲喂大米发酵啤酒废料可提高生长兔的生长性能、养分消化率和氮利用

本研究旨在调查日粮酿酒废料 (RBW) 对生长兔的生长性能、养分利用和氮平衡的影响。30 只生长中的兔子（758 ± 25.7 g 初始体重）被随机分配到对照组和四个治疗组（包含 RBW），采用完全随机设计，每组六只兔子。该研究持续了 6 周，用于测量采食量和生长性能，随后进行了为期 5 天的代谢试验，以确定营养物质的消化率和氮平衡。五种日粮在浓缩物中含有 0% RBW（对照组）、10% 和 20% 的未灭菌 RBW 和 10% 和 20% 的灭菌 RBW。20% 未灭菌 RBW 组的平均每日体重增加 (ADG) 较高 ( p < 0.01) 高于对照组。 对照组与绝育组的 ADG无统​​计学差异 ( p = 0.089)，但未绝育 RBW 组的总体 ADG ( p  = 0.044) 优于绝育 RBW 组。未灭菌和灭菌RBW组每日干物质摄入量均高于对照组（p  <0.01）。然而， 未灭菌和灭菌 RBW 之间没有发现差异 ( p = 0.22)。未灭菌 RBW 组的饲料转化率 (FCR) 低于对照组 ( p  = 0.041)，但对照组与灭菌 RBW 组的 FCR 没有差异 ( p = 0.37) 和未消毒 RBW 组与未消毒 RBW 组 ( p  = 0.14)。未灭菌和灭菌RBW组有机物、粗蛋白和粗纤维的消化率均高于对照组（ p<0.01）。未灭菌和灭菌RBW组的氮平衡和氮利用效率也高于对照组（p  <0.01）。研究表明，日粮 RBW 可以提高生长兔的生长性能和养分利用率，对未灭菌 RBW 的反应更佳。