日粮中添加发酵木薯渣对蛋鸡生产性能及蛋品质的影响

Effects of dietary supplementation with fermented cassava residues on the performance and egg quality of laying hens

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。

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 the number 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.