Influence of dietary vitamin C and selenium, alone and in combination, on the performance of laying hens and quality of eggs

Skřivan, M.; Marounek, M.; Englmaierová, M.; Skřivanová, V.

doi:10.17221/6619-cjas

Cited by 17 publications

(17 citation statements)

References 20 publications

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“…In the case of egg-laying hens fed diets supplemented with vitamin C, sodium selenite or selenized yeast, Skrivan et al (2013) noted significantly increased laying performance; however, vitamin C significantly decreased feed intake and egg production. Both selenite and Se-enriched yeast increased vitamin E concentration in yolk and Se concentration in yolk and albumen.…”

Section: Selenium and Meat And Egg Qualitymentioning

confidence: 94%

Selenium in poultry nutrition: a review

Suchý¹,

Straková²,

Herzig³

2014

Czech J. Anim. Sci.

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Selenium has been known for two centuries and its biological activities have been studied for nearly a hundred years, however the problem of Se deficit has still been persisting both in humans and animals. The cause of Se deficit in animals may be low Se level in soil. This mainly applies to cattle and sheep with their direct link to soil via roughage. The risk of Se deficit in pigs and poultry is lower due to lower dependence on soil Se level in the region and Se fortification in feed mixes. The present research focuses on the effects of Se on meat and egg quality, antioxidant activity of Se, effects on fatty acid levels, activity of glutathione-peroxidase, or the effect of Se on the immune system. Ensuring natural Se supply in human nutrition by food of animal origin, mainly poultry meat and eggs (the "functional foods"), is another area to which extensive attention has recently been paid.

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Section: Selenium and Meat And Egg Qualitymentioning

confidence: 94%

Selenium in poultry nutrition: a review

Suchý¹,

Straková²,

Herzig³

2014

Czech J. Anim. Sci.

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“…Eggs for physical quality determination were collected at 7 h at 28-day intervals for two consecutive days following the procedure of Tumova and Gous (2012) or Skrivan et al (2013). All laid eggs were examined.…”

Section: Methodsmentioning

confidence: 99%

Effects of laying hens housing system on laying performance, egg quality characteristics, and egg microbial contamination

Englmaierová¹,

Tůmová²,

Charvátová³

et al. 2014

Czech J. Anim. Sci.

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ABSTRACT:The objective of this study was to compare the performance, egg quality, and microbial contamination of egg shells from hens maintained in different housing systems, such as conventional and enriched cages, litter, and aviaries. The housing system significantly (P < 0.001) influenced the performance characteristics. The highest egg production, lowest daily feed consumption, and feed conversion ratio were measured in conventional cages compared to litter and aviaries. Higher egg shell and albumen qualities were observed in conventional cages, whereas hens housed in enriched cages and aviaries laid eggs with a higher yolk index (P < 0.001). The housing system significantly (P < 0.001) influenced the total count of bacteria on the egg surface and the microbial contamination of Enterococcus and Escherichia coli. The lowest values for the total count of bacterial contamination (P < 0.001) were found in eggs from conventional cages (4.05 log colony-forming units (CFU)/egg) and enriched cages (3.98 log CFU/egg). Eggs from aviaries had 5.49 log CFU per egg, and the highest level of contamination was observed in eggs that were laid on litter (6.24 log CFU/egg). The level of the microbial contamination of egg shells from litter and aviaries was by 2 log CFU higher than in eggs from cages. It could be concluded, from the viewpoint of egg safety, a more suitable substitute for conventional cages are enriched cages and aviaries than litter.

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“…Non‐enzymatic compounds, such as vitamin C and E, are also powerful antioxidants (Ai et al, ; Betancor et al, ; Gao, Koshio, Ishikawa, Yokoyama, & Edward, ; Montero et al, ). In this sense, high concentrations of vitamin C and E have been detected in fish eggs indicating the importance of these micronutrients during fish early development (Hemre, Mangor‐Jensen, & Lie, ; Lie, Sandvin, & Waagbø, ; Mukhopadhyay, Chattopadhyay, & Mitra, ; Skřivan, Marounek, Englmaierová, & Skřivanová, ). The requirements for vitamins C and E given by NRC () for fish are 30 and 25–120 mg/kg respectively but the supplementation with extra dosage of both vitamins has proved to reduce mortality, oxidative stress as well as to improve growth in fish larvae (Kolkovski et al, ; Merchie, Lavens, & Sorgeloos, ; Stéphan, Guillaume, & Lamour, ).…”

Section: Introductionmentioning

confidence: 99%

Incidence of systemic granulomatosis is modulated by the feeding sequence and type of enrichment in meagre (Argyrosomus regius) larvae

et al. 2018

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Systemic granulomatosis is the most frequent disease in juvenile and adult meagre, but studies regarding the first appearance of granulomas in larvae do not exist. In order to evaluate this, meagre larvae were fed four different feeding regimes as follows: RS and RO (rotifer enriched with Easy DHA Selco or Ori-Green from 3 to 30 dph respectively), RAS and RAO (rotifer enriched with Easy DHA Selco or Ori-Green from 3 to 21 dph and Artemia enriched with Easy DHA Selco or Ori-Green from 12 to 30 dph respectively). All treatments were also fed with commercial microdiet from 20 to 30 dph. At 30 dph weight, length, specific growth rate and survival were significantly higher in Artemia-fed larvae, regardless of the enrichment.Microscopic first appearance of granulomas was observed in 20 dph larvae fed RS and RO. At 30 dph granulomas and thiobarbituric acid reactive substances (TBARS), values were significantly higher in RS and RO-fed larvae than in RAS and RAO-fed larvae. The results showed that granulomas first appeared in meagre larvae at 20 dph when fed rotifers only. Conversely, a reduced appearance of granulomas and lipid peroxidation occurs when Artemia is included in the feeding sequence reinforcing the hypothesis of a nutritional origin of the systemic granulomatosis. K E Y W O R D SArtemia, feeding sequence, meagre larvae, rotifer, systemic granulomatosis, vitamin E

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Influence of dietary vitamin C and selenium, alone and in combination, on the performance of laying hens and quality of eggs

Cited by 17 publications

References 20 publications

Selenium in poultry nutrition: a review

Selenium in poultry nutrition: a review

Effects of laying hens housing system on laying performance, egg quality characteristics, and egg microbial contamination

Incidence of systemic granulomatosis is modulated by the feeding sequence and type of enrichment in meagre (Argyrosomus regius) larvae

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