Eggshell characteristics and cuticle deposition in three laying hen genotypes housed in enriched cages and on litter

Ketta, Mohamed; Tůmová, E.

doi:10.17221/75/2017-cjas

Cited by 7 publications

(6 citation statements)

References 25 publications

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“…Rutkowski et al [7] reported a significant association between the egg production date and egg weight, the proportion of shell in the egg and shell thickness, measured in weeks 5 (5.30 g; 9.70%; 0.357 mm) and 13 (5.90 g; 9.50%; 0.366 mm). Differences in the analysed egg traits, both in the present study and studies reported by other authors, may result from the structure of the shell, particularly from the crystalline layer of the shell and the content of minerals [41].…”

Section: Discussionsupporting

confidence: 44%

Quality of Eggs, Concentration of Lysozyme in Albumen, and Fatty Acids in Yolk in Relation to Blue Lupin-Rich Diet and Production Cycle

Kowalska

Kucharska-Gaca

Kuźniacka

et al. 2020

Animals

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In recent years, the interest in lupin seeds as a source of protein in poultry nutrition has increased. The aim of this study was to assess the quality of table eggs produced by hens that were fed diets containing pea seeds and various levels of narrow-leafed lupin as a substitute for soybean meal. The share of lupin seeds in the treatment groups was 10%, 15%, 20% and 25%. Egg morphology, the fatty acid profile in egg yolk and the amount and activity of lysozyme in egg white were analysed. Results show that using 10–20% lupin seeds in feed in the diet of laying hens in intensive farming does not result in a change in weight or egg structure, their physical properties or their morphological composition. Increasing the share of lupin seeds in feed for laying hens increases the saturation of the colour of egg yolks, which is a desirable feature among consumers. The use of lupin seeds in feed for laying hens does not adversely affect the chemical properties of egg proteins, as expressed by the amount and activity of lysozyme. In feed for laying hens, replacing soybean meal with lupin seeds has a positive effect on the fatty acid profile in egg yolk (omega-3 and -6 polyunsaturated acids and hypocholesterolemic acids).

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Section: Discussionsupporting

confidence: 44%

Quality of Eggs, Concentration of Lysozyme in Albumen, and Fatty Acids in Yolk in Relation to Blue Lupin-Rich Diet and Production Cycle

Kowalska

Kucharska-Gaca

Kuźniacka

et al. 2020

Animals

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“…A non-significant effect of the housing system was detected in our study for eggshell quality parameters. A non-significant effect of the housing system on some eggshell quality parameters, namely eggshell strength and thickness, were detected in our previous study [ 25 ]. Moreover, Kühn et al [ 44 ] concluded that the housing system had no effect on the eggshell weight and eggshell thickness of eggs from the littered floor and free-range systems.…”

Section: Discussionmentioning

confidence: 86%

“…Singh et al [ 3 ] recommended that the hen genotype should be considered when choosing the housing system. Several studies have been done in order to evaluate the effect of a two-way interaction on hen performance and eggshell quality parameters such as the housing system and genotype [ 6 , 25 ], feed Ca level and age [ 23 ], genotype and feed Ca level [ 26 ], and housing system and age [ 27 , 28 ]. Despite that, few studies gave attention to the effect of a three-way interaction of different factors on hen performance and eggshell quality parameters.…”

Section: Introductionmentioning

confidence: 99%

Combined Effect of Genotype, Housing System, and Calcium on Performance and Eggshell Quality of Laying Hens

Ketta

Tůmová

Englmaierová

et al. 2020

Animals

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The objective of this study was to evaluate hen performance and eggshell quality response to genotype, housing system, and feed calcium (Ca) level. For this purpose, an experiment was conducted on 360 laying hens of ISA Brown, Bovans Brown (commercial hybrids), and Moravia BSL (traditional Czech hybrid). Laying hens were kept in enriched cages and on littered floor and fed similar feed mixtures with different Ca content (3.00% vs. 3.50%). In terms of hen performance, ISA Brown had the highest egg production (84.2%) compared to Moravia BSL (74.3%) and Bovans Brown (71.4%). Regarding eggshell quality, Bovans Brown showed the highest values of all eggshell quality parameters. Increasing feed Ca level augmented egg production (p ≤ 0.001) but had no effect on other performance parameters. Except eggshell thickness, all eggshell quality parameters were affected by the three-way interaction of genotype, housing, and Ca. Bovans Brown, which had the strongest eggshells (5089 g/cm2) when housed on a littered floor system and fed 3.00% Ca, while Moravia BSL housed on a littered floor had the weakest eggshells (4236 g/cm2) at 3.50% Ca. The study pointed out the importance of the interactions between studied factors on performance and eggshell quality compared to an individual factor effect.

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“…After measuring eggshell strength, the eggs were broken and the internal egg components were kept for further analysis. Eggshell thickness was measured with a QCT shell thickness micrometer (TSS) at the equatorial region after removal of shell membranes (Ketta and Tumova 2018a). Eggshell weight was determined after complete drying.…”

Section: Experimental Design Genotype and Managementmentioning

confidence: 99%

Response of three laying hen genotypes to two feed calcium levels

Ketta¹,

Tůmová²,

Chodová³

2019

CZECH J ANIM SCI

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The present study aimed to evaluate the effect of two dietary Ca levels (3.00% vs 3.50%) in three hen genotypes (ISA Brown, Bovans Brown and Moravia BSL) on their laying performance and quality of their eggs. In order to evaluate the response to dietary Ca, an experiment was conducted with 300 laying hens. One hundred birds from each genotype were divided into 10 replicates (10 birds/cage/Ca level). To reveal the differences, the following characteristics were measured: hen-day egg production percentage, daily feed intake, egg weight, albumen and yolk weights, Haugh unit, eggshell colour, eggshell weight, eggshell thickness, eggshell strength, egg shape index and eggshell index. A higher Ca level significantly increased the hen-day egg production percentage of Bovans Brown and Moravia BSL, while ISA Brown laying hens had the higher egg production percentage at a lower dietary Ca level (85.97% vs 82.41%). No significant effect of dietary Ca level was observed on any internal egg quality measurements except the Haugh unit. However, the dietary Ca level significantly affected some of external egg quality measurements, namely eggshell colour (P < 0.001), eggshell weight (P = 0.003) and eggshell strength (P = 0.012). The results of the present study show that laying performance and egg quality parameters responded differently according to hen genotype and dietary Ca level. Bovans Brown and Moravia BSL laying hens required higher levels of Ca to keep egg production high, while the eggshell quality measurements were better at the lower dietary Ca level. Thus, it is recommended to adjust the Ca levels in feed to the nutritional requirements of laying hens.

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Eggshell characteristics and cuticle deposition in three laying hen genotypes housed in enriched cages and on litter

Cited by 7 publications

References 25 publications

Quality of Eggs, Concentration of Lysozyme in Albumen, and Fatty Acids in Yolk in Relation to Blue Lupin-Rich Diet and Production Cycle

Quality of Eggs, Concentration of Lysozyme in Albumen, and Fatty Acids in Yolk in Relation to Blue Lupin-Rich Diet and Production Cycle

Combined Effect of Genotype, Housing System, and Calcium on Performance and Eggshell Quality of Laying Hens

Response of three laying hen genotypes to two feed calcium levels

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