Abstract: The current study aimed to investigate the effects of dietary supplementation with fermented cassava residue on the performance and egg quality of Hy?Line brown laying hens. A total of 240 healthy Hy?Line laying hens aged 39 weeks were randomly allocated to 4 groups with 5 replicates per group and 12 hens per replicate. The control group was fed with basic diet，while the experimental groups were fed diets with 5%，10% and 15% fermented cassava residue，respectively. The experiment lasted for 28 days. The results showed as follows：① The feed intake and feed/ egg were significantly increased with the increase of the proportion of fermented cassava residue（P<0.05），while thenumber of egg production，laying rate，and total egg weight were significantly decreased（P<0.05）. ② The shell thickness were significantly decreased with the increase of the proportion of fermented cassava residue（P<0.05）， while the haugh unit and yolk color index were significantly increased（P<0.05）. However，the egg shape index had no difference among the different groups（P>0.05）. ③ Compared with control group，dietary supplementation with 5% fermented cassava residue increased the economic benefits by 7.61 yuan. Overall，our results indicated that dietary supplementation with 5% fermented cassava residue in Hy ? Line brown laying hens increased the egg quality and improved the breeding efficiency.

Key words: fermented cassava residue, laying hens, production performance, egg quality

摘要： 试验旨在探讨发酵木薯渣对海兰褐蛋鸡生产性能及蛋品质的影响。选取39周龄 240只健康海兰蛋鸡，随机分成4组，每组设5个重复，每个重复12只。第1组为对照组，饲喂 基础日粮，第2组、第3组、第4组为试验组，分别饲喂添加5%、10%、15%发酵木薯渣的试验饲 粮。试验期28天。结果显示：①各组平均蛋重差异不显著；第2组与第1组生产性能指标均无 显著差异（P＞0.05），随着发酵木薯渣添加比例的提高，采食量与料蛋比显著提高（P＜0.05）， 产蛋数、产蛋率和总蛋重显著降低（P＜0.05）；②发酵木薯渣对鸡蛋的蛋形指数无影响，随着添 加比例的提高，蛋壳厚度显著降低（P＜0.05），哈氏单位和蛋黄颜色指数显著提高（P＜0.05）； ③试验期内，第2组经济效益比第1组增加7.61元。试验表明，海兰褐蛋鸡日粮中添加5%发酵 木薯渣，可有效改善蛋品质，提高养殖效益。

关键词: 发酵木薯渣, 蛋鸡, 生产性能, 蛋品质