scholarly journals The effects of dietary cottonseed meal and oil supplementation on laying performance and egg quality of laying hens

2019 ◽  
Vol 7 (7) ◽  
pp. 2436-2447
Author(s):  
Yang Mu ◽  
Luo‐Yi Zhu ◽  
Ao Yang ◽  
Xin Gao ◽  
Niya Zhang ◽  
...  
Keyword(s):  
Cottonseed Meal ◽  
Laying Hens ◽  
Egg Quality ◽  
Laying Performance

Effect of expanded cottonseed meal on laying performance, egg quality, concentrations of free gossypol in tissue, serum and egg of laying hens

2014 ◽  
Vol 85 (5) ◽  
pp. 549-554 ◽  
Author(s):  
Chao Yuan ◽  
Hua-hui Song ◽  
Xiao-yun Zhang ◽  
Yuan-jing Jiang ◽  
Ai-ting Zhang ◽  
...  
Keyword(s):  
Cottonseed Meal ◽  
Free Gossypol ◽  
Laying Hens ◽  
Egg Quality ◽  
Laying Performance

scholarly journals Response of three laying hen genotypes to two feed calcium levels

2019 ◽  
Vol 64 (No. 12) ◽  
pp. 504-510
Author(s):  
Mohamed Ketta ◽  
Eva Tumova ◽  
Darina Chodova
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Shape Index ◽  
Quality Parameters ◽  
Laying Performance ◽  
Eggshell Colour ◽  
Quality Measurements ◽  
Haugh Unit

The present study aimed to evaluate the effect of two dietary Ca levels (3.00% vs 3.50%) in three hen genotypes (ISA Brown, Bovans Brown and Moravia BSL) on their laying performance and quality of their eggs. In order to evaluate the response to dietary Ca, an experiment was conducted with 300 laying hens. One hundred birds from each genotype were divided into 10 replicates (10 birds/cage/Ca level). To reveal the differences, the following characteristics were measured: hen-day egg production percentage, daily feed intake, egg weight, albumen and yolk weights, Haugh unit, eggshell colour, eggshell weight, eggshell thickness, eggshell strength, egg shape index and eggshell index. A higher Ca level significantly increased the hen-day egg production percentage of Bovans Brown and Moravia BSL, while ISA Brown laying hens had the higher egg production percentage at a lower dietary Ca level (85.97% vs 82.41%). No significant effect of dietary Ca level was observed on any internal egg quality measurements except the Haugh unit. However, the dietary Ca level significantly affected some of external egg quality measurements, namely eggshell colour (P < 0.001), eggshell weight (P = 0.003) and eggshell strength (P = 0.012). The results of the present study show that laying performance and egg quality parameters responded differently according to hen genotype and dietary Ca level. Bovans Brown and Moravia BSL laying hens required higher levels of Ca to keep egg production high, while the eggshell quality measurements were better at the lower dietary Ca level. Thus, it is recommended to adjust the Ca levels in feed to the nutritional requirements of laying hens.

Bacillus Probiotic Supplementations Improve Laying Performance, Egg Quality, Hatching of Laying Hens, and Sperm Quality of Roosters

2017 ◽  
Vol 10 (2) ◽  
pp. 367-373 ◽  
Author(s):  
Maria S. Mazanko ◽  
Ivan F. Gorlov ◽  
Evgeniya V. Prazdnova ◽  
Maxim S. Makarenko ◽  
Alexander V. Usatov ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Sperm Quality ◽  
Laying Performance

scholarly journals Effects of dietary protein, energy and β-mannanase on laying performance, egg quality, and ileal amino acid digestibility in laying hens.

2021 ◽  
pp. 101312
Author(s):  
Dima White ◽  
Roshan Adhikari ◽  
Jinquan Wang ◽  
Chongxiao Chen ◽  
Jae Hwan Lee ◽  
...  
Keyword(s):  
Amino Acid ◽  
Dietary Protein ◽  
Laying Hens ◽  
Egg Quality ◽  
Protein Energy ◽  
Laying 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.

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