The aim of this study was to determine the effect of the interaction between hen's age and egg storage time on the frequency of occurrence and type of physical defects in turkey poults. The experimental materials comprised 6,048 eggs laid by BUT 6 turkey hens at 32, 38, 46, and 51 wk of age (1,512 eggs per week), which were randomly divided into 4 groups (378 eggs per group) and stored for different periods of time, i.e., 7, 10, 13, and 17 D. After incubation, poults were evaluated individually. Egg weight and the hatch-weight of poults increased with hen's age (P < 0.001). The relative body weight of poults, expressed as a percentage of egg weight, was highest in the group of the youngest hens (70.6%). Prolonged egg storage before incubation contributed to an increase in the percentage of poults with physical abnormalities (P < 0.001). Umbilical abnormalities were most common regardless of the week of the laying season and egg storage time.

中文翻译：

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母鸡日龄和鸡蛋储存时间对火鸡雏鸡身体缺陷发生频率的影响。


本研究的目的是确定母鸡年龄和鸡蛋储存时间之间的相互作用对火鸡雏鸡身体缺陷发生频率和类型的影响。实验材料包括 6 只 32、38、46 和 51 周龄火鸡母鸡所产的 6,048 个鸡蛋（每周 1,512 个鸡蛋），这些鸡蛋被随机分为 4 组（每组 378 个鸡蛋）并储存不同时期。时间，即7、10、13和17天。温育后，对幼禽进行单独评估。鸡蛋重量和雏鸡孵化重量随着母鸡年龄的增加而增加（P< 0.001）。雏鸡的相对体重（以蛋重的百分比表示）在最小的母鸡组中最高（70.6%）。孵化前延长种蛋储存时间导致出现身体异常的雏鸡比例增加（P< 0.001）。无论产蛋季节和鸡蛋储存时间如何，脐部异常都是最常见的。