Effect of frequency of turning from three to eleven days of incubation on hatchability of broiler hatching eggs
Effect of frequency of turning from three to eleven days of incubation on hatchability of broiler hatching eggs
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DOI：
10.1093/ps/82.3.357
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发表时间：
2003-03-01
期刊：
影响因子：
4.4
通讯作者：
Brake, J
中科院分区：
文献类型：
--
作者：
Elibol, O;Brake, J
37、41、59和63周龄肉鸡种鸡的孵化蛋在18℃和75% RH条件下保存1或2 d，然后在孵化3至11 d期间每天翻24、48或96次。孵育1 ~ 2 d和12 ~ 18 d，每天翻24次。37和41周龄的可育孵化率高于59和63周龄，主要原因是早期死亡胚胎增加。与24次或48次相比，每天翻96次可提高可育孵化率。这种改善是由于晚期胚胎死亡率的降低。群龄与饲养龄对可育孵化率和胚胎死亡率无显著交互作用。
Hatching eggs from broiler breeder flocks at 37, 41, 59, and 63 wk of age were stored for 1 or 2 d at 18 C and 75% RH and then turned 24, 48, or 96 times per day from 3 to 11 d of incubation. All eggs were turned 24 times per day from 1 to 2 d and 12 to 18 d of incubation. Fertile hatchability was better at 37 and 41 wk of age than at 59 and 63 wk of age due primarily to increased early dead embryos. Fertile hatchability was increased by turning 96 times per day compared to either 24 or 48 times per day. This improvement was due to a reduction in late embryonic mortality. There was no significant interaction of flock age x turning in storage for fertile hatchability or embryonic mortality.