龙骨骨折对产蛋后期蛋鸡恐惧行为、生产性能和蛋品质的影响

doi:10.16431/j.cnki.1671-7236.2024.01.009

Abstract

Abstract: 【Objective】 Keel bone fracture (KBF) is one of the important welfare problems for health and production of laying hens.This study was aimed to assess responses of fear behavior, production performance and egg quality of laying hens in later laying period with or without KBF.【Method】 At 60-week-age, a total of 100 Hyline Brown laying hens and Lindian chickens were selected and housed individually in traditional battery cage.The experimental subjects were divided into keel fractured and unfractured laying hens by palpation and portable X-ray.The fear behavioral responses of laying hens were detected sequentially by tonic immobility (TI) tests, open field tests (OFT) and startle reflex tests (SRT).The production performance and egg quality of laying hens at 68 weeks of age were detemined.【Result】 In TI test, the elevated duration time of laying hens with KBF from two breeds were significantly higher than that of normal laying hens (P<0.05).In OFT test, the number of areas entered, steps and time spent in the outer zone of Lindian chickens and Hyline Brown laying hens with KBF were significantly lower than that of normal laying hens (P<0.05), and the time spent in the inner zone of laying hens with KBF were significantly higher than that of normal laying hens (P<0.05).The movement latency of fractured Hyline Brown laying hens were significantly higher than that of normal laying hens (P<0.05).In SRT test, the total score of startle reflex of two laying breeds with KBF was significantly lower than that of normal laying hens (P<0.05).Therefore, the responses of fear behavior of laying hens with KBF station were stronger.The laying rate of laying hens with KBF was significantly lower than that of normal laying hens in two varieties (P<0.05).The egg shape index of fractured Hyline Brown laying hens was significantly lower than that of normal laying hens (P<0.05), and there was no significant difference in other egg quality parameters between fractured and normal laying hens (P>0.05).【Conclusion】 KBF increased the responses of fear behavior, and reduced the welfare quality and production performance of laying hens at the later laying period.

Key words: laying hens; keel bone fracture (KBF); fear behavior; production performance; animal welfare

CLC Number:

S815

ZHANG Jiaqi, YANG Kaiqi, ZHANG Jingyi, WANG Xiaoxu, WANG Ye, WANG Rui, YU Hanlin, CHEN Yanqing, BAO Jun, ZHANG Runxiang. Effects of Keel Bone Fracture on Fear Behavior, Production Performance and Egg Quality of Laying Hens in Later Laying Period[J]. China Animal Husbandry and Veterinary Medicine, 2024, 51(1): 86-95.

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Effects of Keel Bone Fracture on Fear Behavior, Production Performance and Egg Quality of Laying Hens in Later Laying Period

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