Abstract The objective of this study was to determine whether substitution of soybean oil by acai oil in the feed of laying hens at the end of the production cycle would improve health and performance, as well as egg quality. We used 56 laying hens (Hy Line Brown; 80 weeks old). The animals were kept in an experimental house, housed in cages with four animals each in a completely randomized design, with two treatments of seven replicates each. The treatments were soybean group (basal diet) and acai group (basal diet, replacement of soybean oil by Acai oil). All animals received water ad libitum. Before starting the experiment, eggs were collected for 3 days to measure the initial laying rate, which was 85 % of the average postural rate for the groups. After 21 days of experiment, we observed lower laying rate and higher mortality rate in the acai-containing group than in the control group. By contrast, the acai group had higher egg weight than control group. Regarding the sum of saturated fatty acids ( Σ SFA), the control group displayed a higher sum than acai group. The sum of monounsaturated fatty acids ( Σ MUFA) was higher in the group consuming acai than in the soy group. Lipid peroxidation (LPO) analysis showed lower activity in the acai oil group than in the soy group. Lymphocyte counts were lower in the acai group than in the soy group at 21 days of experiment. These data suggest that replacement of soybean oil with acai berry in the laying hen feed stimulated antioxidant responses, resulting in better egg quality. However, we do not recommend the use of acai oil as a substitute for soybean oil, because it resulted in high mortality rates and lower production rates.

中文翻译：

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在蛋鸡日粮中用巴西莓油替代大豆油对脂肪酸组成和蛋品质的影响

摘要 本研究的目的是确定在生产周期结束时在蛋鸡饲料中用巴西莓油替代大豆油是否会改善健康和生产性能以及鸡蛋质量。我们使用了 56 只蛋鸡（Hy Line Brown；80 周大）。将动物饲养在实验屋中，笼子里饲养四只动物，每只动物是完全随机设计的，两个处理，每个处理 7 个重复。处理为大豆组（基础饲料）和巴西莓组（基础饲料，用巴西莓油代替大豆油）。所有动物都接受随意饮水。在开始实验之前，收集了 3 天的鸡蛋以测量初始产蛋率，这是各组平均姿势率的 85%。经过21天的实验，我们观察到，与对照组相比，含 acai 组的产蛋率更低，死亡率更高。相比之下，acai 组的蛋重高于对照组。关于饱和脂肪酸（Σ SFA）的总和，对照组显示出高于acai组的总和。食用巴西莓的组中单不饱和脂肪酸 (Σ MUFA) 的总和高于大豆组。脂质过氧化 (LPO) 分析表明，巴西莓油组的活性低于大豆组。在实验的第 21 天，acai 组的淋巴细胞计数低于大豆组。这些数据表明，在蛋鸡饲料中用巴西莓替代大豆油可刺激抗氧化反应，从而提高鸡蛋质量。但是，我们不建议使用巴西莓油代替大豆油，