<abstract xmlns="http://www.w3.org/1999/xhtml"><p><bold></bold> The objective of the study was to test the hypothesis that eggs from native breed laying hens fed a diet containing increased amounts of local feed materials are not inferior in quality to eggs from laying hens receiving a standard diet but raised without outdoor access. The study involved Greenleg Partridge (Z-11) and Rhode Island Red hens (R-11). Within each breed, the control group (C) consisted of 60 hens kept on litter without outdoor access, stocked at 5 birds/m2 and fed a diet containing 65.3% of local feed materials. The experimental group (E) contained 60 layers maintained on litter with access to an outdoor area (11 m2 per bird) and fed a diet containing 77.1% of local feed materials. Eggs from hens of both breeds, which received diets containing increased proportions of local feed materials had lower weight but higher yolk percentage. The quality of eggshells from hens fed the diet with increased amounts of local materials was similar to that of eggshells from confined hens. Egg yolk lipids from experimental groups were characterized by a more beneficial n-6/n-3 acid ratio and elevated vitamin A levels. These eggs had better sensory scores for colour, flavour and aroma, which suggests that it is appropriate to raise native breeds of chickens with outdoor access and local feed materials can be used in extensive husbandry systems.</p></abstract>

The objective of the study was to test the hypothesis that eggs from native breed laying hens fed a diet containing increased amounts of local feed materials are not inferior in quality to eggs from laying hens receiving a standard diet but raised without outdoor access. The study involved Greenleg Partridge (Z-11) and Rhode Island Red hens (R-11). Within each breed, the control group (C) consisted of 60 hens kept on litter without outdoor access, stocked at 5 birds/m2 and fed a diet containing 65.3% of local feed materials. The experimental group (E) contained 60 layers maintained on litter with access to an outdoor area (11 m2 per bird) and fed a diet containing 77.1% of local feed materials. Eggs from hens of both breeds, which received diets containing increased proportions of local feed materials had lower weight but higher yolk percentage. The quality of eggshells from hens fed the diet with increased amounts of local materials was similar to that of eggshells from confined hens. Egg yolk lipids from experimental groups were characterized by a more beneficial n-6/n-3 acid ratio and elevated vitamin A levels. These eggs had better sensory scores for colour, flavour and aroma, which suggests that it is appropriate to raise native breeds of chickens with outdoor access and local feed materials can be used in extensive husbandry systems.

Effect of outdoor access and increased amounts of local feed materials in the diets of hens covered by the gene-pool protection programme for farm animals in Poland on quality of eggs during peak egg production / Wpływ dostępu do wybiegu i zwiększonego udziału krajowych komponentów paszowych w żywieniu rodów kur objętych programem ochrony na jakość jaj w szczycie nieśności

Department of Animal Genetic Resources Conservation, National Research Institute of Animal Production, 32-083 Balice n. Kraków, Poland

Department of Animal Production and Poultry Products Evaluation, University of Rzeszów, M. Ćwiklińskiej 2, 35-601 Rzeszów, Poland

Department of Animal Nutrition and Feed Science, National Research Institute of Animal Production, 32-083 Balice n. Kraków, Poland

Annals of Animal Science

The objective of the study was to test the hypothesis that eggs from native breed laying hens fed a diet containing increased amounts of local feed materials...

Publicado en línea: 24 abr 2013

Páginas: 327 - 339

DOI: https://doi.org/10.2478/aoas-2013-0013

This content is open access.