scholarly journals IMPACT OF FEED RESTRICTED SYSTEM AND ZINC FORMS ON SOME PRODUCTIVE PERFORMANCE TRAITS, EGG QUALITY PARAMETERS AND ECONOMIC EFFICIENCY OF MANDARAH LAYING HENS.

2021 ◽  
Vol 26 (4) ◽  
pp. 1017-1031
Author(s):  
Wesam Ayoup ◽  
Mostafa Tawfeek ◽  
Ali rashwan ◽  
mostafa Abd El Rahim ◽  
Ahmed Bealish
Keyword(s):  
Economic Efficiency ◽  
Laying Hens ◽  
Egg Quality ◽  
Quality Parameters ◽  
Productive Performance ◽  
Performance Traits

scholarly journals Effect of L-Arginine on Productive Performance, Egg Quality Parameters, Blood and Hormone Parameters of Laying Hens in Late-phase of Production

2018 ◽  
Vol 8 (17) ◽  
pp. 11-17 ◽  
Author(s):  
Mohammad Kazemi-Fard ◽  
Soheil Yousefi ◽  
Mansour Rezaei ◽  
Bahram Shohre ◽  
Tannaz Saberifar
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Late Phase ◽  
Quality Parameters ◽  
Productive Performance

scholarly journals The influence of strain and age on some egg quality parameters of commercial laying hens

2011 ◽  
Vol 27 (4) ◽  
pp. 1649-1658 ◽  
Author(s):  
D. Kocevski ◽  
N. Nikolova ◽  
A. Kuzelov
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Quality Parameters ◽  
Older Age ◽  
White Line ◽  
Egg Weight ◽  
Statistical Significant Difference ◽  
Significant Difference ◽  
Breeding Technology ◽  
Egg Shell

The experiment was conducted to evaluate the influence of strain and age on some egg quality parameters (egg weight and egg shell strength) of commercial laying hens. Layers of lines ISA Brown and DeKalb White were examined in period of nine months. Both lines were at same age (28 weeks) and were confined in common facility in battery cages. Laying hens were reared and fed according to standard breeding technology. Once a month 25 eggs of each line were taken to be examined for eggshell strength and egg weight, or in other words, total 450 table eggs were tested. Analises were done in Laboratory for testing egg quality by gaudges Egg Multi Tester EMT 5200 and Egg shell Gauge (Robotmation Co. Ltd., Tokyo, Japan) which have computerised equipment to examine quality and physical characteristics of eggs. Statistic analyses on results were done by computer sub-programme ANOVA and Fisher's LSD test to determine the level of statistical significant difference between examined factors. Egg weight was under significant impact of age (P ? 0,05), but not under the influence of strain, although eggs of ISA Brown line were insignificantly heavier than eggs of DeKalb White line. Eggs were heaviest at layers with older age, while they were lightest at younger birds. The results have shown significant differences (P ? 0,05) in eggshell strength compared to line influence (genotype) and months of age. Eggs from ISA Brown laying hens had much better and eggshell strength than those eggs from DeKalb White. Correlations between eggshell strength and egg weight were with significant (R < 0,05) negative value, which indicating that with increasing egg weight decreases of eggshell strength.

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

Effects of dietary Bacillus subtilis RX7 and B2A supplementation on productive performance, egg quality, blood profiles, and excreta Salmonella counts in laying hens

2020 ◽  
Vol 100 (3) ◽  
pp. 411-417
Author(s):  
Huan Shi ◽  
Wan Lin Zhang ◽  
In Ho Kim
Keyword(s):  
Bacillus Subtilis ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Basal Diet ◽  
Productive Performance ◽  
Blood Profile ◽  
Colony Forming Units ◽  
Dietary Treatments ◽  
Blood Profiles

An experiment was carried out to investigate the effect of Bacillus subtilis RX7 and B2A supplementation on egg production, egg quality, blood profile, and excreta Salmonella population in laying hens. A total of 192 Hy-Line Brown laying hens (40-wk-old) were randomly assigned into four dietary treatments, each of which was replicated eight times with six hens per replicate in a 5 wk trial. The dietary treatments were NC, which is a basal diet without antibiotics or Bacillus subtilis; PC, which is an NC + 0.5 g kg−1 antibiotic (virginiamycin) diet; BSR, which is an NC + 0.5 g kg−1 Bacillus subtilis RX7 (1.0 × 109 colony forming units g−1); and BSB, which is an NC + 0.5 g kg−1 Bacillus subtilis B2A (1.0 × 109 colony forming units g−1). The results showed that hens receiving BSB diets had increased (P < 0.05) eggshell thickness over hens fed the NC, PC, and BSR diets (week 3). The excreta Salmonella counts in the PC, BSR, and BSB groups were lower than the NC group (P < 0.05). These results indicate that dietary inclusion of Bacillus subtilis RX7 and B2A strains effectively decreased excreta Salmonella counts without any detrimental effects on the performance of laying hens.

FEEDING VALUE OF RAPESEED FOR LAYING HENS

1972 ◽  
Vol 52 (3) ◽  
pp. 563-566 ◽  
Author(s):  
A. J. LESLIE ◽  
J. D. SUMMERS
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Experimental Period ◽  
Quality Parameters ◽  
Feed Consumption ◽  
Feeding Value ◽  
And Performance ◽  
Feeding Diets ◽  
Haugh Unit

An experiment was conducted to determine the effects of feeding diets containing 0, 5, 10, and 15% ground raw rapeseed to three replicates of 14 laying hens each. Isocaloric isonitrogenous diets were fed for a 28-day experimental period and performance and egg quality parameters were measured. Egg production was depressed at the two higher levels of rapeseed inclusion but was not affected at the 5% level of inclusion. Haugh unit, albumen height, and shell deformation were not affected significantly (P > 0.05) but egg weight decreased progressively as rapeseed inclusion increased. Feed consumption was significantly depressed (P < 0.05) at the 15% level of rapeseed and slightly reduced at the other levels.

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