Impact of supplementing diets with propolis on productive performance, egg quality traits and some haematological variables of laying hens

2015 ◽  
Vol 101 (3) ◽  
pp. 441-448 ◽  
Author(s):  
A. A. A. Abdel-Kareem ◽  
T. M. El-Sheikh
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Quality Traits ◽  
Productive Performance

Effects of dietary supplementation of Kappaphycus alvarezii on productive performance and egg quality traits of laying hens

2018 ◽  
Vol 31 (3) ◽  
pp. 2065-2072 ◽  
Author(s):  
A. B. Mandal ◽  
A. Biswas ◽  
N. A. Mir ◽  
Praveen K. Tyagi ◽  
D. Kapil ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Kappaphycus Alvarezii ◽  
Dietary Supplementation ◽  
Quality Traits ◽  
Productive Performance

scholarly journals Effects of Cold Stress and Ammonia Concentration on Productive Performance and Egg Quality Traits of Laying Hens

Animals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2252
Author(s):  
Dapeng Li ◽  
Qin Tong ◽  
Zhengxiang Shi ◽  
Weichao Zheng ◽  
Yu Wang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Early Period ◽  
Ammonia Concentration ◽  
Cold Climate ◽  
Control Group ◽  
Quality Traits ◽  
Productive Performance

In a cold climate, ensuring indoor air quality and heat preservation simultaneously has always been a difficult problem in the poultry house. The current study was carried out in order to determine the effects of chronic low temperature and ammonia concentration on productive performance and egg quality of commercial laying hens. 576 18-week-old Hy-line Brown hens were used in this study. Birds were housed in cages and received for 20-week exposure to low temperature and ammonia in six artificial environmental chambers. Birds were randomly assigned into six treatments: treatment 1 (T1, 20 °C, ≤5 ppm, control group), treatment 2 (T2, 20 °C, 20 ppm), treatment 3 (T3, 20 °C, 45 ppm), treatment 4 (T4, 8 °C, ≤5 ppm), treatment 5 (T5, 8 °C, 20 ppm) and treatment 6 (T6, 8 °C, 45 ppm). Daily feed intake (DFI), feed efficiency (FE), egg production (EP) and body weight (BW) were recorded and calculated from 19 weeks of age. Egg samples were collected at 22, 26, 30, 34 and 38 weeks of age and egg weight (EW), shell breaking strength (SBS), albumen height (AH), yolk weight (YW), shell weight (SW), shell thickness (ST) and Haugh unit (HU) were measured. The results of the present study indicated that low temperature and excessive ammonia decreased the EP of hens compared with those of the T1 birds. Low temperature increased DFI of hens thereby FE showed significant differences among treatments. During the early period of the experiment, low temperature treatment increased the BW of laying hens, but this trend of increase was suppressed by the treatment of ammonia with the prolongation of the experimental period. Egg quality was also affected by low temperature and excessive ammonia. At different experimental periods, egg quality traits of hens exposed to the cold and ammonia stress presented significant differences compared to those of control birds. The present study indicated that the effect of ammonia was more pronounced on hens than that of low temperature at the early and peak laying period in terms of several main traits of productive performance and egg quality under long term hens breeding.

scholarly journals Influence of the energy and digestible lysine contents of the diet on performance and egg quality traits of brown-egg laying hens from 19 to 59 weeks of age

2021 ◽  
pp. 101211
Author(s):  
R. Scappaticcio ◽  
J. Garcia ◽  
G. Fondevila ◽  
A.F. de Juan ◽  
L. Cámara ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Egg Laying ◽  
Quality Traits
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