Franco Claudio M A, Araújo Itallo C S, Lopes Tainá S B, Gonçalves Thayna F, Costa Bruno T A, Sousa Lorena S, Araújo Isadora M S, Souza Marcelo R, Lara Leonardo J C
Departamento de Zootecnia, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
Departamento de Zootecnia, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
Poult Sci. 2023 Sep 29;102(12):103156. doi: 10.1016/j.psj.2023.103156.
In this study, the effects of egg type and sanitization time on eggshell and yolk sac microbiological quality, hatchability, and broiler performance at 7 and 35 d of age were evaluated. A total of 3,440 eggs from a commercial flock Cobb500 were randomly assigned in a 2 × 2 factorial scheme, separated by the type of egg (clean nest or floor) and eggs sanitization at 30 or 120 min after collection, totaling 4 treatments. After hatching, 312 male chicks were randomly selected and distributed according to treatment. Egg type and timing of eggshell sanitization did not influence the microbiological quality of the eggshell surfaces or hatchability (P > 0.05). The number of contaminated unhatched eggs was higher in the floor eggs group (P ≤ 0.05). There were no interactions between the studied factors or individual effects on feed intake, body weight gain, or feed conversion ratio (P > 0.05) in birds at 7 and 35 d of age. Floor eggs sanitized after 120 min had reduced productive factor compared to birds from clean nest eggs. It was concluded that the incubation of floor eggs sanitized 30 or 120 min after collection did not influence hatching results. However, a delay in the sanitization of floor eggs can increase the contamination of the chick yolk sac and consequently reduce the viability of broilers at 35 d. Floor eggs should therefore be sanitized 30 min than 120 min after collection.
在本研究中，评估了蛋的类型和消毒时间对蛋壳及卵黄囊微生物质量、孵化率以及7日龄和35日龄肉鸡生产性能的影响。从商业鸡群Cobb500中收集了3440枚蛋，按照2×2析因设计方案随机分配，根据蛋的类型（清洁巢蛋或地面蛋）以及收集后30分钟或120分钟进行蛋消毒，共4种处理。孵化后，随机选取312只雄性雏鸡并按处理进行分配。蛋的类型和蛋壳消毒时间对蛋壳表面微生物质量或孵化率没有影响（P>0.05）。地面蛋组中未孵化的受污染蛋数量较多（P≤0.05）。在7日龄和35日龄的鸡中，所研究因素之间没有交互作用，对采食量、体重增加或饲料转化率也没有个体影响（P>0.05）。与来自清洁巢蛋的鸡相比，收集后120分钟消毒的地面蛋生产性能有所下降。得出的结论是，收集后30分钟或120分钟消毒的地面蛋孵化对孵化结果没有影响。然而，地面蛋消毒延迟会增加雏鸡卵黄囊的污染，从而降低35日龄肉鸡的存活率。因此，地面蛋应在收集后30分钟而非120分钟进行消毒。
