Egg quality of laying hens fed diets with plant extracts

ABSTRACT. The objective of this study was to evaluate the effect of marigold flower extract and paprika on egg quality of Black Avifran laying hens in different periods of storage. A completely randomized design study with a 3x3 factorial scheme with three diets (control, paprika, and marigold flower extract) and three storage periods (0, 7, and 14 days) was carried out. The following metrics were evaluated: egg weight, yolk weight, shell weight; yolk color, albumen height, specific gravity, and Haugh unit as well as the yolk, shell, and albumen percentage relative to the total weight of the egg. There was no significant interaction between additives and storage time (p > 0.05) for most of the parameters evaluated. The only exception was observed for yolk color, in which the interaction effect between treatments was significant (p < 0.05). The effect of storage time was significant (p < 0.05) for albumen weight, albumen percentage, yolk color, albumen height, specific gravity, and Haugh unit, with reduction of these parameters over the evaluation period. The use of paprika and marigold flower extract in the diets of Black Avifran laying hens does not influence egg quality.

摘要。本研究旨在评估金盏花提取物与辣椒粉在不同贮藏周期下，对黑阿维弗兰（Black Avifran）蛋鸡所产鸡蛋品质的影响。本研究采用完全随机设计，设置3×3因子试验方案，包含3种日粮处理（对照组、辣椒粉组、金盏花提取物组）与3个贮藏周期（0、7、14天）。本研究评估了以下指标：蛋重、蛋黄重、蛋壳重；蛋黄颜色、蛋白高度、比重、哈氏单位（Haugh unit），以及蛋黄、蛋壳、蛋白占鸡蛋总重量的百分比。多数评估参数未显示添加剂与贮藏时间间存在显著交互作用（p > 0.05）。唯一例外为蛋黄颜色，其处理间交互效应显著（p < 0.05）。贮藏时间对蛋白重量、蛋白占比、蛋黄颜色、蛋白高度、比重及哈氏单位均存在显著影响（p < 0.05），上述参数随贮藏周期延长呈下降趋势。在黑阿维弗兰蛋鸡日粮中添加辣椒粉与金盏花提取物，并不会对鸡蛋品质产生影响。