Dedousi Anna, Đukić Stojčić Mirjana, Sossidou Evangelia
Veterinary Research Institute, Hellenic Agricultural Organization Demeter, Thessaloniki, Greece.
Department of Animal Science, Faculty of Agriculture, University of Novi Sad, Novi Sad, Serbia .
Vet Res Forum. 2020 Fall;11(4):299-304. doi: 10.30466/vrf.2019.99568.2375. Epub 2020 Dec 15.
The aim of this study was to investigate whether keel bone damage is prevalent in laying hens in Greece. The study was conducted in three industrial farms using different housing systems: (a) enriched cages, (b) floor system, and (c) free-range system. One hundred hens per housing system, randomly selected, were evaluated for keel bone damages with the method of palpation. Complementarily, thirty eggs from each farm were selected for the measurement of egg weight, shape index, shell cleanness, shell color, shell breaking force, shell thickness, shell weight, egg yolk color, albumen height, and Haugh unit. The presence of keel bone damage was evident in all housing systems with the significantly highest occurrence being observed in the free-range system (50.00%), followed by enriched cages (24.00%) and floor system (7.00%). Eggs from all three systems had significant differences in all estimated egg quality parameters apart from shell color and Haugh unit.
本研究的目的是调查希腊蛋鸡龙骨损伤是否普遍存在。该研究在三个采用不同饲养系统的工业农场进行:(a)富集笼养系统,(b)地面平养系统,以及(c)放养系统。每个饲养系统随机选取100只母鸡,采用触诊法评估龙骨损伤情况。作为补充,从每个农场选取30枚鸡蛋,测量蛋重、形状指数、蛋壳清洁度、蛋壳颜色、蛋壳破裂力、蛋壳厚度、蛋壳重量、蛋黄颜色、蛋白高度和哈氏单位。所有饲养系统中均明显存在龙骨损伤,其中放养系统的发生率最高(50.00%),其次是富集笼养系统(24.00%)和地面平养系统(7.00%)。除蛋壳颜色和哈氏单位外,来自所有三个系统的鸡蛋在所有估计的蛋品质参数上均存在显著差异。