Knowledge of the effect exerted by the system used in laying hybrids husbandry on eggs quality
2010
Usturoi, M. G., University of Agricultural Sciences and Veterinary Medicine, Iasi (Romania) | Radu-Rusu, R. M. | Usturoi, Al.
Eggs classifying on the hens husbandry system criterion generated the false suspicion that those issued from hens accommodated in halls with battery cages would present high "toxic" potential. The experiments focused on the chemical and microbiological features assessment of the eggs produced by hens reared within different systems (Lc=controlled environment hall, in BP-3 batteries; L1exp=controlled environment hall, in BP-3 batteries with enlarged cages; L2exp=controlled environment hall, on permanent litter; L3exp=permanent litter, in a hall opened toward an external paddock). Yolk proteins reached 2.61g/egg in Lc group, respectively 2.62-2.73g/egg in the experimental treatments, while the lipids were found at different levels, meaning 6.27g/egg in Lc and 6.28-6.42g/egg in the other groups. Albumen proteines were assessed at 3.48g/egg in Lc group, respectively at 3.49-3.63g/egg in L1exp-L3exp groups. Lowest germs content on the eggshell was found at the eggs produced by the hens reared in batteries, in controlled environment halls (127.01 germs/cm2 in L1exp group and 132.65 germs/cm2 in Lc group), which meant 54.92-76.92% lower, respectively 48.33-69.40% less than the values found at the other husbandry versions. Therefore, the main research conclusion states that husbandry system does not influence the eggs chemical composition but substantially modify the eggshell microbial contamination degree, leading to the risk of an exponential multiplication of germs during eggs storage.
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