The effect of genotype, housing system and egg collection time on egg quality in egg type hens

Tůmová, E.; Skřivan, M.; Englmaierová, M.; Zita, Lukáš

doi:10.17221/1736-cjas

Cited by 37 publications

(35 citation statements)

References 17 publications

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“…Eggshell strength and eggshell thickness increased toward peak production, then decreased with increased hen age in cage and outdoor systems (30). Thus, in the present study, among all of the housing systems the lowest egg shell breaking strength and shell thickness were found at the age of 50% hen-day egg production in the FR system.…”

Section: Discussionsupporting

confidence: 53%

Impact of different housing systems and age of layers on egg quality characteristics

Dikmen¹,

İpek²,

Şahan³

et al. 2017

Turk J Vet Anim Sci

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The material for the current research was obtained from 480 layers (Lohmann Brown) housed in conventional-cage (CC), enriched-cage (EC), and free-range (FR) production systems between 22 and 60 weeks of age. A total of 720 eggs were analyzed for external and internal egg quality traits.The three housing systems were located within the same research unit of Uludağ University. Two cage systems, CC and EC, were installed in a windowed and fan-ventilated cage hen house with both cage types in the same room. The FR system was located 120 m from the cage hen house.The CC system consisted of galvanized wire cages (50 × 45 × 45 cm) with a trough-type galvanized feeder, egg belt, manure belt, and nipple drinker. Each CC cage provided a total of 562.5 cm 2 floor area per hen.The EC system cages met the requirements of EU Directive 1999/74/EC. The EC system consisted of 2 tiers, and each tier consisted of 2 cages (4 EC cages). The EC

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Section: Discussionsupporting

confidence: 53%

Impact of different housing systems and age of layers on egg quality characteristics

Dikmen¹,

İpek²,

Şahan³

et al. 2017

Turk J Vet Anim Sci

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“…The minimum requirement for the maximal eggshell quality was found to be 50-100 mg/kg. Our overall results show that sup- Eggshell breakage is known to be directly related to the quality of the shell, which can be affected by nutrition and breeding conditions (Emery et al, 1984;Tůmová et al, 2009). It is well established that trace elements may affect eggshell quality by their catalytic properties as key enzymes involved in the process of membrane and eggshell formation, or by interaction directly with the calcite crystals in the formation of eggshells (Zamani et al, 2005).…”

Section: Discussionmentioning

confidence: 63%

Effects of feed supplementation with manganese from its different sources on performance and egg parameters of laying hens

Venglovská¹,

Grešaková²,

Plachá³

et al. 2014

CZECH J ANIM SCI

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ABSTRACT:The objective of this study was to compare the effects of feed supplementation of laying hens with manganese from its inorganic and organic sources on performance and some parameters of egg quality. Ninety-six hens at 20 weeks of age were randomly allocated to 4 dietary treatments, each consisting of 6 replicates (4 birds per replicate). The control group was fed unsupplemented basal diet (BD) with only natural background Mn level of 46.4 mg/kg feed. For the three experimental treatments, the BD was supplemented with 120 mg Mn/kg either from Mn-sulphate or Mn-chelate of protein hydrolysate (Mn-Pro) or Mn-chelate of glycine hydrate (Mn-Gly). After 8 weeks of dietary treatments the egg production, egg weight, feed intake, and feed efficiency were not affected by dietary treatments. Regardless of the sources, Mn supplementation to feed resulted in significantly decreased percentages of cracked eggs compared to the unsupplemented control group. The thickness, weight, proportion, and index of eggshell were significantly elevated in all groups supplemented with Mn. The intake of Mn-Gly resulted in considerably increased Mn deposition in egg yolk compared to the control eggs. In the control and Mn-sulphate groups yolk malondialdehyde (MDA) started to increase after 20 and 30 days of egg storage respectively, whereas in eggs from hens given organic Mn-sources this parameter was not affected up to 40 days. Although there were no significant differences in MDA values between the treatments until 20 days of storage, the Mn-sulphate group showed significantly higher MDA concentration in yolks compared to the control group after 30 days of storage. These results demonstrate that supplementation of hens' diet with Mn has positive effects on eggshell quality. Feed supplementation with Mn from organic sources appears to be more effective in preventing yolk lipid oxidation during cold storage of eggs than that from Mn-sulphate.

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“…The effect of genotype on yolk weight was described by Leyendecker et al (2001b), Singh et al (2009) and Tůmová et al (2009). The lower impact of housing on yolk weight and a higher fluctuation in yolk weight in enriched cages might have been responsible for the large variation in egg weight, which was most obvious in the ISA Brown line, which laid the lightest eggs with the smallest yolks in the enriched cages.…”

Section: Discussionmentioning

confidence: 85%

Interaction between housing system and genotype in relation to internal and external egg quality parameters

Tůmová¹,

Englmaierová²,

Ledvinka³

et al. 2011

CZECH J ANIM SCI

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ABSTRACT:The effect of three housing systems (conventional cages, enriched cages and litter) on egg quality parameters was evaluated in two experiments with four brown laying strains ISA Brown, Hisex Brown, Bovans Brown and Moravia BSL. During 40 weeks of lay the total number of 7200 eggs was produced and analysed for egg weight, egg component weight and eggshell quality indicators. In 60 eggs, pore density in the small-end, large-end and equatorial areas was determined. Significant interactions between genotype and housing were found out in egg weight (P ≤ 0.001), yolk and albumen weight (P ≤ 0.001) and yolk colour (P ≤ 0.001). Haugh units were the highest in eggs laid in cages and the lowest in the ISA Brown strain. Eggshell quality indicators were affected more by genotype than by housing. The interaction between genotype and housing was not significant for eggshell thickness but it was significant for eggshell weight and strength. Although eggshell thickness was lower in eggs produced in cages, eggshell strength was higher. A significant negative correlation was found out between pore density and housing system. Results of the study suggest that the ability of a strain to produce eggs of high quality in a particular housing system should be considered, even within brown strains.

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The effect of genotype, housing system and egg collection time on egg quality in egg type hens

Cited by 37 publications

References 17 publications

Impact of different housing systems and age of layers on egg quality characteristics

Impact of different housing systems and age of layers on egg quality characteristics

Effects of feed supplementation with manganese from its different sources on performance and egg parameters of laying hens

Interaction between housing system and genotype in relation to internal and external egg quality parameters

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