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对不同储存周期下黑阿维弗兰（Black Avifran）产蛋鸡蛋品质的影响。本研究采用3×3因子设计的完全随机试验方案，设置3种日粮处理（对照组、辣椒粉组、金盏花提取物组）与3个储存周期（0、7、14天）。
本次试验测定的指标包括：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、蛋壳与蛋白占蛋总重量的百分比。
多数测定指标未显示添加剂与储存时间间存在显著交互作用（p>0.05）。唯一例外为蛋黄颜色，其处理间交互作用显著（p<0.05）。
储存时间对蛋白重量、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），上述指标随评估周期延长呈下降趋势。
在黑阿维弗兰产蛋鸡的日粮中添加辣椒粉与金盏花提取物，对蛋品质无显著影响。