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首页> 外文期刊>Poultry Science >Impact of feeding program after light stimulation through early lay on the reproductive performance of broiler breeder hens.
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Impact of feeding program after light stimulation through early lay on the reproductive performance of broiler breeder hens.

机译:早期产蛋后光刺激后饲喂程序对肉鸡种鸡繁殖性能的影响。

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摘要

Skip-a-day feed restriction is a common industry management technique that is used in rearing broiler breeder pullets. Often pullets are maintained on a skip-a-day feeding program after they have been photostimulated for reproduction, and in some cases until 5% egg production is reached. The current research examined whether providing daily nutrient intake during the critical period of ovarian development that follows photostimulation for reproduction improves subsequent egg production. Pullets and cockerels were fed on a skip-a-day basis during rearing. Pullets were weighed at 20 wk of age and then distributed into 30 laying pens such that each pen had a similar BW distribution. Each individual laying pen consisted of 35 hens and 4 roosters. At 21 wk of age, the birds were photostimulated for reproduction; 15 of the laying pens were placed on an every-day feeding schedule, whereas the other 15 pens were maintained on a skip-a-day feeding schedule until they reached 8% egg production at 26.5 wk of age. From 26.5 to 65 wk of age, all hens were fed on an every-day basis. The CV of BW did not differ between the hens of the 2 treatment groups at any point from 21 to 64 wk of age. Weekly percentage hen-day egg production was greater (P < 0.05) in the hens fed on the every-day versus skip-a-day program after photostimulation from wk 25 of age to 65 wk of age except for wk 29, 30, 35, 37, 39, 46, and 47 of age. Total hen-day egg production through 65 wk of age in the hens that were provided feed every day after photostimulation was greater (172 vs. 155 eggs/hen) than in hens fed on a skip-a-day basis until 26.5 wk of age. These results suggest that continuing skip-a-day feeding after photostimulation until reaching 8% egg production does not improve BW uniformity, but does cause lasting reproductive dysfunction in broiler breeder hens.
机译:每天跳过饲料限制是饲养肉鸡种母鸡时常用的行业管理技术。在对小母鸡进行光刺激繁殖后,通常会隔天进行饲养,在某些情况下,直到产蛋率达到5%。目前的研究检查了在光刺激繁殖后的卵巢发育关键时期是否提供每日营养摄入可以改善随后的产卵量。在饲养过程中,每天要给小鸡和小公鸡喂食。雏鸡在20周龄时称重,然后分配到30头产蛋笔中,使每只笔具有相似的体重分布。每只产蛋鸡由35只母鸡和4只公鸡组成。在21周龄时,对鸟进行光刺激以进行繁殖;将15头产蛋鸡按每天的喂食时间表放置,而其余15头蛋按每天不停的喂食时间表维护,直到它们在26.5周龄时产蛋率达到8%。从26.5到65周龄,所有母鸡每天都被喂食。在两个处理组的母鸡中,从21周龄到64周龄之间的任何时候,BW的CV均无差异。从25周龄到65周龄的光刺激后,每天饲喂的母鸡的日产蛋百分率较高(P <0.05),而不是每天跳过的母鸡,37、39、46和47岁。在光刺激后每天提供的母鸡中,直到65周龄的母鸡日总产蛋量大于每天不喂饲的母鸡(172比155蛋/母鸡)。 。这些结果表明,在光刺激后继续不停喂一天直到产蛋量达到8%并不能改善肉鸡的体重均匀性,但会导致肉种鸡长期繁殖功能障碍。

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