Laboratory of Poultry Sciences, Regional of Excellence Centre on Poultry Science, University of Lome, B.P. 1515 Lome, Togo.
Laboratory of Poultry Sciences, Regional of Excellence Centre on Poultry Science, University of Lome, B.P. 1515 Lome, Togo.
Poult Sci. 2022 May;101(5):101810. doi: 10.1016/j.psj.2022.101810. Epub 2022 Feb 26.
This study investigated the effects and possible interactions of storage and nonventilation during incubation for eggs from Sasso broiler breeder flock on pre- and post-hatch incubation results. A total of 1,260 Sasso eggs from a 58-wk-old broiler breeder flock were individually numbered, weighed and stored for 7 d or for 18 d in a climate-controlled room (16°C, 75% RH). After storage, eggs were weighed, and randomly assigned equally into 2 incubators. One of the incubators was ventilated (V) for the entire incubation and the second was nonventilated (NV) for the first 12 d. At d 18, the eggs were weighed, candled, and fertile eggs were transferred from the turning trays to hatching baskets. During the last 3 d of incubation, hatching eggs were checked individually every 3 h for hatching events and hatchability of fertile eggs. After pull out at d 21.5, post-hatch performances was determined until 1 wk of age. Results showed that, embryo weights from eggs in NV incubator was significantly higher (P < 0.05) in both stored eggs compared to those from eggs in ventilated incubator, but embryos from eggs stored for 18 d were smaller (P < 0.05) than those from eggs stored for 7 d. Hatchability was higher (P < 0.0001) in NV incubator compared to V incubator in both 7 d and 18 d stored eggs and an interaction was found between incubation ventilation and storage duration on both hatchability and embryonic mortality (P < 0.0001). Chick weights from NV incubator at 7 d post-hatch was greater (P = 0.0009) than those from V incubator. Serum Tri-iodothyronine (T) and Thyroxin (T) concentrations were significantly higher (P < 0.05) in NV compare to V group. It was concluded that the effect of long-term pre-incubation storage on embryonic physiology and post-hatch growth interacted significantly with incubation ventilation and that nonventilation can compensate for the negative effects of storage on some hatching and post-hatch performances.
本研究旨在探讨 Sasso 肉鸡种鸡群种蛋在孵化过程中储存和不通风对孵化前和孵化后结果的影响及其可能的相互作用。从 58 周龄的肉鸡种鸡群中采集了 1260 枚 Sasso 种蛋，每枚种蛋都单独编号、称重并在气候控制室内储存 7 天或 18 天（温度为 16°C，相对湿度为 75%）。储存后，再次称重，并将种蛋随机均分为两组，分别放入两个孵化器中。其中一个孵化器（V 组）在整个孵化过程中进行通风，另一个（NV 组）在前 12 天不通风。第 18 天，再次称重，并进行照蛋，然后将有活力的种蛋从转蛋托盘转移到孵化筐中。在孵化的最后 3 天，每隔 3 小时检查每枚种蛋的孵化情况和有活力种蛋的孵化率。第 21.5 天出雏后，直到 1 周龄时，记录雏鸡的生长性能。结果表明，与 V 组相比，NV 组中储存的种蛋胚胎重量显著更高（P < 0.05），但储存 18 天的种蛋胚胎更小（P < 0.05）。与 V 组相比，NV 组在储存 7 天和 18 天的种蛋中均具有更高的孵化率（P < 0.0001），且在孵化通风和储存时间之间存在相互作用，对孵化率和胚胎死亡率都有影响（P < 0.0001）。出雏后 7 天，NV 组雏鸡体重显著高于 V 组（P = 0.0009）。NV 组血清三碘甲状腺原氨酸（T）和甲状腺素（T）浓度显著高于 V 组（P < 0.05）。综上所述，长期预孵储存对胚胎生理和出雏后生长的影响与孵化通风显著相关，不通风可以弥补储存对某些孵化和出雏后性能的负面影响。
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