Quality of eggs from pasture rearing layers of different genotypes

Škrbić, Zdenka; Lukić, Miloš; Petričević, Veselin; Bogosavljević-Bošković, Snežana; Rakonjac, Simeon; Dosković, Vladimir; Толимир, Н.

doi:10.2298/bah2002181s

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…Moreover, information about feed intake from the outdoor areas is still scarce. There is no clear evidence that laying performance and egg quality properties are improved when hens are raised with free access to outdoor areas with vegetation, as has been reported previously [11,18]. Therefore, further studies are warranted.…”

Section: Introductionmentioning

confidence: 86%

Laying Performance, Egg Quality Characteristics, and Egg Yolk Fatty Acids Profile in Layer Hens Housed with Free Access to Chicory- and/or White Clover-Vegetated or Non-Vegetated Areas

Bozbay

Akdağ

Bozkurt-Kiraz

et al. 2021

Animals

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This study investigated the laying performance, egg quality, and egg yolk fatty acids (FAs) and cholesterol content in layer hens housed with free access to chicory- and/or white clover-vegetated areas. During a 16-week study, 400 Lohmann Brown hens (32 weeks old) housed with free outdoor access were allocated randomly into four groups, each with four replicates of 25 hens. Control hens were fed a conventional diet with free access to a soil area (C), whereas other hens were fed on a conventional diet with free access to a chicory (CI)- or white clover (TR)-vegetated area or a CI and TR mixture (MIX)-vegetated area. The C hens consumed more concentrate feed (p = 0.018) than the TR and MIX hens, which had a higher herbage intake than the CI birds (p < 0.001). The C hens produced eggs with a thicker shell than those in the other treatment groups (p = 0.013). Compared with C, the saturated FAs of egg yolk decreased for MIX (p = 0.010). The polyunsaturated FAs were higher in the MIX eggs than in the C and TR eggs (p < 0.001). Although FAs were distributed in all quadrants of the principal component analysis (PCA), three main FA profiles could be identified based on the loadings of natural groupings in the PC2 versus PC1 plot. The present study shows clear evidence for the contribution of herbage to the hen diet without affecting laying performance. In addition, the FA composition of the CI and MIX vegetation contributed to the production of eggs with preferred FA attributes, such as polyunsaturated FAs and a favourable n-6 to n-3 ratio.

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Section: Introductionmentioning

confidence: 86%

Laying Performance, Egg Quality Characteristics, and Egg Yolk Fatty Acids Profile in Layer Hens Housed with Free Access to Chicory- and/or White Clover-Vegetated or Non-Vegetated Areas

Bozbay

Akdağ

Bozkurt-Kiraz

et al. 2021

Animals

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Quality perception throughout the table egg supply chain

Mitrović

Tomašević

Đjekić

2021

BFJ

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Purpose:This research shows how the perception of quality differs through the table egg chain and highlights the main quality characteristics for each studied chain participant (farm, retail, consumer).Design/methodology/approach:Observing the change in perception starts from the farm, through retail to the end consumer using the customer–supplier interaction, while looking back from the consumer to the farm, the application of the quality function deployment (QFD) was used. The study included 30 farms, 50 retail stores, 1,000 customers and 300 households.Findings:The farm–retail comparison highlights the type of production as the dominant factor affecting egg quality for both of these participants, followed by hen diet and the type of laying hen hybrid from the farmer's point of view, while retail focuses on packaging and egg damage. Egg quality aspects from the retail–household perspective emphasize the shell appearance and the origin of the eggs, while shelf life and egg class are equally important characteristics for both participants. The application of the QFD throughout the entire egg chain emphasizes quality vs price as the most important characteristic.Originality/value:This study could serve to food policy makers as an introduction to further research and production orientation in relation to the set of quality requirements associated with the egg supply chain.

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Comparative study of the production potential of indigenous poultry breeds of Banat naked neck and Svrljig hen: Reproductive parameters and egg quality

Škrbić,

Petričević,

Rakonjac

et al. 2024

Acta agriculturae Serbica

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In order to preserve indigenous and locally adapted breeds through development programs for sustainable egg and meat production, it is necessary to have more data on the potential of these breeds in different production conditions. Accordingly, the objective of the study was to determine and compare the reproductive potential, production performance and egg quality of two indigenous poultry breeds: the Banat Naked Neck (BNN) and the Svrljig Hen (SH), in improved growing conditions (nutrition, photoperiod and housing) in relation to the traditional rearing of these breeds. Four flocks for each breed were housed in floor pens in a closed facility during the winter months, and then in the vegetation season (April-September) they were kept in mobile cages in the pasture. The duration of the photoperiod in the facility was 15 hours, and in the pasture, they were exposed to the natural duration of daylight. The layers were fed ad libitum with balanced complete mixtures for layer-line hybrids and during the vegetation season supplemented with food found in the pasture around the mobile cage. The reproductive potential of BNN and SH hens was determined on the basis of the age of the hens at the beginning of laying, the age at the peak of laying and the number of eggs per housed hen. The egg hatching properties were examined based on the percentage of chicks hatching in relation to the number of laid and fertilized eggs. Data on the quality of table eggs were obtained by testing over eight-week periods during the entire laying period. Under the applied rearing, nutrition and photoperiod conditions, BNN hens achieved production in accordance with their genetic potential defined by the breed standard, while SH layers with 126.43 eggs/housed hen achieved production higher than the breed standard. The egg production of these two breeds of hens differed in the intensity and persistence of laying, which, in addition to a higher peak of laying, resulted in a higher production of egg/housed hen BNN (146.71) compared to SH. On the other hand, parameters of table egg quality, i.e., shell quality and egg albumen/yolk ratio, were significantly better in SH. Also, SH had a higher reproductive potential compared to BNN hens based on the percentage of fertilized and hatched eggs.

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Quality of eggs from pasture rearing layers of different genotypes

Cited by 3 publications

References 11 publications

Laying Performance, Egg Quality Characteristics, and Egg Yolk Fatty Acids Profile in Layer Hens Housed with Free Access to Chicory- and/or White Clover-Vegetated or Non-Vegetated Areas

Laying Performance, Egg Quality Characteristics, and Egg Yolk Fatty Acids Profile in Layer Hens Housed with Free Access to Chicory- and/or White Clover-Vegetated or Non-Vegetated Areas

Quality perception throughout the table egg supply chain

Comparative study of the production potential of indigenous poultry breeds of Banat naked neck and Svrljig hen: Reproductive parameters and egg quality

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