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Different energy levels and restricted feeding to 3 strains of single comb white leghorn hybrids 2. effects on egg shell quality and egg composition



Different energy levels and restricted feeding to 3 strains of single comb white leghorn hybrids 2. effects on egg shell quality and egg composition



Swedish Journal of Agricultural Research 12(4): 177-184



Egg shell quality traits (load deformation, thickness, percentage and weight per square centimeter of surface area), albumen quality, yolk color and chemical gross composition were studied in 2 consecutive experiments, each covering a laying period of 364 days. Three commercial lines of Single Comb White Leghorm hens were fed 1 of 4 diets with different energy concentrations. In a special treatment, hens fed the highest energy diet were restrictedly fed after peak production by limiting the amount of feed. Feed restriction had no obvious effect on shell quality traits. Shell strength was not affected or slighly improved when diet energy content increased. There were strain differences in shell strength criteria, but these differences were not confirmed by the local packing station. About 1% of all produced eggs in the cages were detected as cracked without candling and the differences between diets and strains tended to be closely related to other shell strength traits. Shell strength was either not correlated or was positively correlated to egg size. Albumen consistency and albumen protein content differed significantly between strains.

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Accession: 005152270

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