scholarly journals Effects of energy concentration of the diet on productive performance and egg quality of brown egg-laying hens differing in initial body weight

2012 ◽  
Vol 91 (12) ◽  
pp. 3156-3166 ◽  
Author(s):  
A. Pérez-Bonilla ◽  
S. Novoa ◽  
J. García ◽  
M. Mohiti-Asli ◽  
M. Frikha ◽  
...  
Keyword(s):  
Body Weight ◽  
Laying Hens ◽  
Egg Quality ◽  
Egg Laying ◽  
Energy Concentration ◽  
Productive Performance ◽  
Initial Body Weight

scholarly journals Long-term effects of choline on productive performance and egg quality of brown-egg laying hens

2013 ◽  
Vol 92 (7) ◽  
pp. 1824-1829 ◽  
Author(s):  
Q.H. Zhai ◽  
X.F. Dong ◽  
J.M. Tong ◽  
Y.M. Guo ◽  
Y.E. Bao
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Egg Laying ◽  
Productive Performance ◽  
Long Term Effects

scholarly journals Effects of the main cereal and type of fat of the diet on productive performance and egg quality of brown-egg laying hens from 22 to 54 weeks of age

2011 ◽  
Vol 90 (12) ◽  
pp. 2801-2810 ◽  
Author(s):  
A. Pérez-Bonilla ◽  
M. Frikha ◽  
S. Mirzaie ◽  
J. García ◽  
G.G. Mateos
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Egg Laying ◽  
Productive Performance

scholarly journals Productive Performance and Egg Quality of Brown Egg-Laying Hens in the Late Phase of Production as Influenced by Level and Source of Calcium in the Diet

2008 ◽  
Vol 87 (10) ◽  
pp. 2043-2051 ◽  
Author(s):  
H.M. Safaa ◽  
M.P. Serrano ◽  
D.G. Valencia ◽  
M. Frikha ◽  
E. Jiménez-Moreno ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Late Phase ◽  
Egg Laying ◽  
Productive Performance

scholarly journals Effect of main cereal of the diet and particle size of the cereal on productive performance and egg quality of brown egg-laying hens in early phase of production

2009 ◽  
Vol 88 (3) ◽  
pp. 608-614 ◽  
Author(s):  
H.M. Safaa ◽  
E. Jiménez-Moreno ◽  
D.G. Valencia ◽  
M. Frikha ◽  
M.P. Serrano ◽  
...  
Keyword(s):  
Particle Size ◽  
Early Phase ◽  
Laying Hens ◽  
Egg Quality ◽  
Egg Laying ◽  
Productive Performance

scholarly journals The Effect of Age and Genotype on Quality of Eggs in Brown Egg‑Laying Hybrids

2019 ◽  
Vol 67 (2) ◽  
pp. 407-414 ◽  
Author(s):  
Adam Kraus ◽  
Lukáš Zita
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Shape Index ◽  
Egg Laying ◽  
Average Weight ◽  
Eggshell Thickness ◽  
External Quality ◽  
Technological Value ◽  
Effect Of Age

The aim was to assess the internal and external quality of consumer eggs of egg‑laying hens of two selected genotypes depending on their age. All of these hens were kept in enriched cages. There were compared eggs from Hy‑Line Brown and ISA Brown hens at the age from 36 to 64 weeks. In total, 3840 eggs from 300 hens were evaluated. Quality of eggs was determined by their technological value. Statistically significant interactions (P = 0.001) between age and genotype were found in all evaluated parameters except for the yolk colour (P = 0.044), whereas there was not found interaction (P = 0.072) between age and genotype in eggshell strength. The significant effect of hens’ age was found in all evaluated parameters, with the only exception of the yolk colour. The results showed that the average weight of eggs, eggshell, albumen and yolk increased with the age. Also the eggshell proportion, its colour and yolk index values ​​increased, whereas the egg shape index, eggshell thickness and strength, albumen proportion, Haugh units, the albumen and the yolk index decreased. Statistically significant effect of the genotype was found in all evaluated parameters except for the yolk index. When comparing both genotypes, the eggs from ISA Brown hens had a better quality. The trend of deteriorating egg quality with age was confirmed.

Productive Performance and Egg Quality of Laying Hens Raised in Conventional and Furnished Cages

2013 ◽  
Vol 1 (2) ◽  
pp. 108-112
Author(s):  
F. Iannaccone ◽  
F. Bovera ◽  
F. Rossi ◽  
C. Di Meo ◽  
G. Piccolo ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Productive Performance

scholarly journals Performance and egg quality of commercial laying hens fed with various levels of protected sodium butyrate

2021 ◽  
Vol 50 (5) ◽  
Author(s):  
M.F. Pires ◽  
N.S.M. Leandro ◽  
D.V. Jacob ◽  
F.B. Carvalho ◽  
H.F. Oliveira ◽  
...  
Keyword(s):  
Sodium Butyrate ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Block Design ◽  
Productive Performance ◽  
Quadratic Effect ◽  
Randomized Block Design ◽  
Commercial Poultry

Two experiments were conducted to evaluate the effect of including protected sodium butyrate (PSB) in the diets of laying hens of advanced age on productive performance and egg quality. In experiment 1, a total of 320 Dekalb White 61-week-old laying hens were distributed in a randomized block design to four treatments (0, 105, 210, and 300 g/ton of PSB) with eight replicates of 10 birds. The experiment was conducted over 112 days, divided into four periods of 28 days each. Productive performance and egg quality were evaluated. In experiment 2, a total of 58 000 Dekalb White 70-week-old laying hens were assigned to diets containing either 0 or 105 g/ton of PSB with two replicates of 14 500 birds. The experiment was conducted on a commercial poultry farm. Egg production and the percentages of broken eggs and dirty eggs were evaluated. The PSB levels did not influence the productive performance of laying hens. A quadratic effect was observed for eggshell thickness, percentage of eggshell and eggshell strength, reaching maxima at 193, 136 and 198 g/ton of PSB, respectively. A quadratic effect on yolk index reached a minimum at 181 g/ton of PSB. The percentages of dirty eggs and broken eggs were lower in laying hens fed 105 g/ton of PSB. In conclusion, the addition of PSB to the diets of old laying hens improved the eggshell quality and decreased the percentage of broken and dirty eggs Keywords: egg quality, laying hens, organic acids, performance, protected sodium butyrate

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