Egg quality as influenced by production systems

Belyavin, C. G.

doi:10.1079/wps19880008

Cited by 14 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the present experiment, this parameter was not affected by the evaluated light sources or periods (Table 5). Fry et al (1981), Fletcher et al (1983) and Belyavin (1988) mentioned that Haugh unit values decrease as birds age, but this was not observed here. Egg specific gravity (Table 6) did not present any significant differences (p>0.05) among light sources, but was influenced by period.…”

Section: The Use Of Light-emitting Diodes (Led) In Commercial Layer Pcontrasting

confidence: 39%

The use of light-emitting diodes (LED) in commercial layer production

Borille¹,

Garcia²,

Royer³

et al. 2013

Rev. Bras. Cienc. Avic.

View full text Add to dashboard Cite

Artificial lighting is one of the most powerful management tools available to commercial layer producers. Artificial light allows anticipating or delaying the beginning of lay, improving egg production, and optimizing feed efficiency. This study aimed at comparing the performance of commercial layers submitted to lighting using different LED colors or conventional incandescent lamps. The study was carried out in a layer house divided in isolated environments in order to prevent any influenced from the neighboring treatments. In total, 360 Isa Brown layers, with an initial age of 56 weeks, were used. The following light sources were used: blue LED, yellow LED, green LED, red LED, white LED, and 40W incandescent light. Birds in all treatment were submitted to a 17-h continuous lighting program, and were fed a corn and soybean meal-based diet. A completely randomized experimental design with subplots was applied, with 24 treatments (six light sources and four periods) of three replicates. Egg production (%) was significantly different (p<0.05) among treatments, with the best results obtained with red LED, white LED, and incandescent light sources. Egg weight, feed intake, and internal egg quality (albumen height, specific gravity, and Haugh units) were not influenced (p>0.05) by light source. It was concluded that the replacement of incandescent light bulbs by white and red LEDs does not cause any negative effect on the egg production of commercial layers.

show abstract

Section: The Use Of Light-emitting Diodes (Led) In Commercial Layer Pcontrasting

confidence: 39%

The use of light-emitting diodes (LED) in commercial layer production

Borille¹,

Garcia²,

Royer³

et al. 2013

Rev. Bras. Cienc. Avic.

View full text Add to dashboard Cite

show abstract

“…Some other recent studies (Lewko andGornowicz, 2011 andOhh, 2013) reported that soiled egg was higher on barn than in cages. The result is also partially supported by Belyavin (1988), who reported that the incidence of dirty and soiled eggs were higher on floor than in cages.…”

Section: Resultssupporting

confidence: 77%

Effects of cage and barn rearing system on early laying performance of pullet

Rouf¹,

Ahammed

Ahammad

et al. 2016

Bang. J. Anim. Sci.

View full text Add to dashboard Cite

The present experiment was conducted with 144 Shaver 579 egg laying pullets to compare their performances reared on barn and in cages for a period of 16 weeks from 25 to 40 weeks of age. Feed consumption, feed conversion (FC) and egg weight were significantly higher when reared on barn than in cages. However, hen day egg production (HDEP), egg mass, body weight, livability, albumen index, Haugh unit (HU), yolk index, shape index and egg shell thickness did not differ (P>0.05) between pullets under two different rearing systems. Soiled eggs (p<0.01) and shell breaking strength (P<0.05) were higher for the pullets reared on barn than in cages. In contrast, yolk color score (YCS) was higher (P<0.05) in eggs collected from the cage-reared pullets when compared with the eggs of pullets reared on barn. It is concluded that egg laying pullets can be reared either on barn or in cages successfully in Bangladesh condition without any adverse effect on egg production.

show abstract

“…According Silversides et al (1993Silversides et al ( , 1994, the Haugh unit of eggs obtained from hens at 26 weeks of age was 88.48±0.44, and at 65 weeks, the value was 77.40±0.44. Pope et al (1960), Cunningham et al (1960), Fletcher et al (1981Fletcher et al ( , 1983 and Belyavin (1988) are unanimous on Haugh unit and age of the hen, and stated the Haugh unit decreases with increasing age. Romanoff & Romanoff (1963), Campos et al (1973) and Fennema (1993) stated that in eggs stored at room temperature or higher temperature, the quality can be preserved provided that the shell is impermeable to carbon dioxide loss.…”

Section: Resultsmentioning

confidence: 99%

Egg quality of laying hens in different conditions of storage, ages and housing densities

et al. 2012

View full text Add to dashboard Cite

-The objective of this research was to evaluate the quality of eggs from Dekalb White hens under different temperatures (room temperature, 25 ºC; and refrigeration, 8 ºC), storage times (7, 14 and 21 days), age of birds (35, 40, 45 and 50 weeks) and housing densities (625, 500, 416.6 and 357.14 cm 2 /birds). Haugh unit (HU) values and albumen height of 1,120 eggs from 528 laying hens, randomly allocated to four groups with different population densities were evaluated. The results showed a significant effect on Haugh units, between the time and storage conditions and between the ages of laying hens and storage condition. Eggs stored in refrigeration showed less weight loss and better Haugh unit indices when compared with eggs stored at room temperature. The increased time of storage, regardless of the temperature, caused loss in their quality. According to the results of this study, based on the evaluation of the albumen height, temperature, storage time, density and age of the layers influence the values of Haugh unit.

show abstract

Egg quality as influenced by production systems

Cited by 14 publications

References 0 publications

The use of light-emitting diodes (LED) in commercial layer production

The use of light-emitting diodes (LED) in commercial layer production

Effects of cage and barn rearing system on early laying performance of pullet

Egg quality of laying hens in different conditions of storage, ages and housing densities

Contact Info

Product

Resources

About