scholarly journals Effect of Dietary Supplementation with Diatomaceous Earth on Egg Quality Traits in Hens Raised on Deep Litter

2020 ◽  
Vol 2 (6) ◽  
Author(s):  
Robert Alex Isabirye ◽  
Savino Biryomumaisho ◽  
James Acai-Okwee ◽  
Samuel Okello ◽  
George William Nasinyama
Keyword(s):  
Specific Gravity ◽  
Diatomaceous Earth ◽  
Egg Quality ◽  
Control Diet ◽  
Dietary Supplementation ◽  
Quality Parameters ◽  
Quality Traits ◽  
Weight Percentage ◽  
Calcium Phosphorus ◽  
Haugh Unit

The study was conducted to investigate the effect of dietary diatomaceous earth (DE) on egg quality traits in deep litter hens. A total of 280 Lohmann Brown pullets were at 20 weeks of age divided into 4 groups. Three groups were fed on one of the three experimental diets supplemented with 2%, 3% or 4% DE, while the fourth group was fed on a control diet without DE supplementation. Each group had seven replicates of 10 birds. One egg was collected randomly per replicate (for a total of 7 eggs per group), weighed and determined for: yolk weight, albumen weight, eggshell weight, eggshell thickness, specific gravity, albumen height, yolk height, yolk colour and Haugh unit. Findings showed that DE supplementation resulted into significant (p<0.05) increase in eggshell weight and yolk height. Dietary supplementation with DE in the current study was, however, not effective on other egg quality parameters such as on eggshell weight percentage, egg specific gravity, yolk colour and Haugh unit. However, results of the study also showed that DE supplementation improved significantly (p<0.05) egg quality especially by improving viscosity as flocks grew older as compared to younger flocks. Further research should focus on the effect of dietary DE on eggshell and bone strength of layer birds. Research should also explore the interactions among the minerals found in DE (e.g. calcium, phosphorus and magnesium) and how these interactions affect egg quality in laying hens.

scholarly journals Egg quality assessment at different storage conditions, seasons and laying hen strains

2017 ◽  
Vol 41 (3) ◽  
pp. 322-333 ◽  
Author(s):  
Vivian Feddern ◽  
Marina Celant De Prá ◽  
Rúbia Mores ◽  
Rodrigo da Silveira Nicoloso ◽  
Arlei Coldebella ◽  
...  
Keyword(s):  
Specific Gravity ◽  
Room Temperature ◽  
Egg Quality ◽  
Storage Period ◽  
Storage Conditions ◽  
Quality Parameters ◽  
Laying Hen ◽  
Unit Weight ◽  
Internal Quality ◽  
Haugh Unit

ABSTRACT Eggs are one of nearly perfect protein foods, offering nutrients of great biological value. However, during storage, egg albumen and yolk components may alter and deteriorate egg quality. Therefore, the aim of this work was to assess egg quality during 9-week storage. Parameters such as Haugh unit, weight loss, egg width and length, specific gravity, yolk and albumen dimensions and their pH were evaluated weekly. A total of 270 eggs (n=5) collected from two different hen strains were evaluated under room (20 to 35 °C in summer; 11.2 to 29.7 °C in autumn) and refrigerated (0 to 5 °C in summer; -3.1 to 6.5 °C in autumn) temperatures. For storage time, an unfolding analysis was accomplished by regression analysis using orthogonal polynomials. As a second approach, principal component analysis (PCA) was performed in order to assess correlations among quality parameters on storage conditions and laying hen strains. By the end of the 9-week storage period, eggs kept under refrigeration presented similar quality parameters to eggs stored at room temperature for only 3 weeks. In contrast, eggs kept at room temperature presented faster degradation from week 1 to 5. No differences on egg quality parameters were noticed between white and brown shells eggs. PCA suggests that better egg quality (first week) was associated mainly with higher egg weight and its specific gravity, Haugh unit and albumen height. Eggs stored at room temperature should be consumed in 2 weeks or refrigerated until 8 weeks, preserving internal quality from farm to retail.

scholarly journals Dietary Supplementation of Increasing Levels of DLMethionine and L-Lysine in Hypoproteic Diets for Laying Hens Improves Productivity and Egg Quality

2015 ◽  
Vol 12 (1) ◽  
pp. 7 ◽  
Author(s):  
Yordan Martínez-Aguilar ◽  
Román Rodríguez-Bertot ◽  
Cesar Betancur-Hurtado ◽  
Dairon Más-Toro ◽  
Carlos Olmo-González ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Control Diet ◽  
Dietary Supplementation ◽  
Essential Amino Acids ◽  
Quality Parameters ◽  
Amino Acid Supplementation ◽  
Peak Period ◽  
Randomized Design ◽  
Mass Conversion

<p>To evaluate the effect of dietary supplementation of DL-methionine and L-lysine in hypoprotein diets on productivity and egg quality, a total of 240 White Leghorn laying hens (Hybrid L-33) of 26 weeks during laying peak period were placed for 49 days, according to completely randomized design with four treatments and 10 repetitions. Dietary treatments consisted of a control diet (no amino acid supplementation) (T0) and supplementation of 0.03% DL-Met and 0.04% L-Lys (T1); 0.06% DL-Met and 0.08% L-Lys (T2) and 0.09% DL-Met and 0.12% L-Lys (T3). At 26 and 33 weeks of age, 30 eggs per treatment were collected to determine internal and external egg quality parameters.</p><p>The experiment diets did not affect the viability and feed intake. Supplementation of essential amino acids, especially the T3 improved egg weight (54.30 to 58.30 g), laying rate (76.89 to 85.45%) and mass conversion (2.52 to 2.11 kg/kg) (P&lt;0.05). At 33 week, the albumin height (7.21 to 8.23 mm), Haugh units (86.70 to 91.15) (P&lt;0.05) and shell surface (67.10 to 69.20 cm2) increased by the effect of supplementation of DL-Met and L-Lys. The results allow recommending the dietary supplementation of 0.09% DL-Met and 0.12% L-Lys in hypoprotein diets to improve productivity and egg quality in laying hens.</p>

scholarly journals THE RELATIONSHIPS BETWEEN SELECTED EGG QUALITY TRAITS AND EGG SIZE

2021 ◽  
Vol 21 ◽  
pp. 156-160
Author(s):  
S. O. Iposu ◽  
C. F. I. Onwuka ◽  
D. Eruvbetine
Keyword(s):  
Specific Gravity ◽  
Regression Models ◽  
Shell Thickness ◽  
Egg Size ◽  
Egg Quality ◽  
Poultry Farm ◽  
Quality Traits ◽  
The South ◽  
Egg Weight ◽  
Haugh Unit

The relationships between selected egg quality traits and sizes of eggs were studied in a part of the South Western Nigeria with a view to egg marketers and to investigating the variation in egg quality egg size changes. 320 market eggs and 40 freshly-laid eggs collected from a poultry farm were used for the study in which egg weight, specific gravity, haugh units, percent yolk, percent albumen, shell thickness and percent shell measurements were obtained. Quality traits for small and large-sized eggs were observed as: Egg Weight (53.34 vs 67.07 g), shell thickness (0.375 mm Vs 0.377mm), Percent shell (9.60 Vs 8.94), specific gravity (1.073 1.069), haugh unit (67.65 Vs 61.38), Percent albumen (62.28 Vs 64.35) and percent yolk (28.13 Vs 26.71), respectively. Egg size was observed to correlate positively with percent albumen (P<0.05) and shell thickness. It, however, correlated negatively with all other quality traits measured. Regression models between eggsize and the various quality traits were also established. It was concluded that small-sized eggs could be of better quality in terms of the traits measured.

Effects of the dietary supplementation of chromium and vitamin C on egg quality traits in heat-stressed Japanese quails (Coturnix cot. japonica)

2015 ◽  
Author(s):  
Najmeh Karimi* ◽  
Y. Jafari Ahangari ◽  
S. Zerehdaran ◽  
A. Akhlaghi ◽  
S.R. Hashemi ◽  
...  
Keyword(s):  
Vitamin C ◽  
Egg Quality ◽  
Dietary Supplementation ◽  
Quality Traits ◽  
Japanese Quails

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.

scholarly journals Egg quality of laying hens fed diets with plant extracts

2019 ◽  
Vol 41 (1) ◽  
pp. 43801
Author(s):  
Debora Duarte Moraleco ◽  
Jean Kaique Valentim ◽  
Larissa Gonçalves Silva ◽  
Heder José D'Ávila Lima ◽  
Tatiana Marques Bitencourtt ◽  
...  
Keyword(s):  
Specific Gravity ◽  
Storage Time ◽  
Laying Hens ◽  
Egg Quality ◽  
Shell Weight ◽  
Flower Extract ◽  
Randomized Design ◽  
And Storage ◽  
Haugh Unit

The objective of this study was to evaluate the effect of marigold flower extract and paprika on egg quality of Black Avifran laying hens in different periods of storage. A completely randomized design study with a 3x3 factorial scheme with three diets (control, paprika, and marigold flower extract) and three storage periods (0, 7, and 14 days) was carried out. The following metrics were evaluated: egg weight, yolk weight, shell weight; yolk color, albumen height, specific gravity, and Haugh unit as well as the yolk, shell, and albumen percentage relative to the total weight of the egg. There was no significant interaction between additives and storage time (p > 0.05) for most of the parameters evaluated. The only exception was observed for yolk color, in which the interaction effect between treatments was significant (p < 0.05). The effect of storage time was significant (p < 0.05) for albumen weight, albumen percentage, yolk color, albumen height, specific gravity, and Haugh unit, with reduction of these parameters over the evaluation period. The use of paprika and marigold flower extract in the diets of Black Avifran laying hens does not influence egg quality.

Effects of dietary copper supplementation on performance, egg quality parameters, yolk cholesterol and fatty acid profiles in laying hens

2017 ◽  
Author(s):  
H. Kaya ◽  
A. Kaya ◽  
M. Macit ◽  
S. Çelebi ◽  
Ö. Kaynar
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Profile ◽  
Laying Hens ◽  
Egg Quality ◽  
Control Diet ◽  
Basal Diet ◽  
Quality Parameters ◽  
Dietary Copper ◽  
Copper Supplementation ◽  
Yolk Cholesterol

The present study envisaged the effects of different levels of dietary copper supplementation on performance, egg quality parameters, serum and yolk cholesterol and triglyceride levels, and yolk fatty acid profile in laying hens. Total 96 Lohman laying hens (38 weeks old) were randomly divided into four groups (n=24 each). Experimental diets were prepared by adding copper (0, 200, 250 or 300 mg/kg) to basal diet and feeding was lasted 12 weeks. Dietary copper supplementation decreased egg weight and feed intake but did not affect other performance parameters compared to the control diet. Shape index, shell weight, shell thickness, yolk color, yolk index, albumen index, and haugh unit were not influenced by dietary copper supplementation, whereas shell strength increased due to the inclusion of copper in the basal diet. Copper supplementation did not affect the fatty acid profile of the egg yolk. The yolk cholesterol ratio decreased by 7.22% in the presence of 250 mg/kg copper supplementation compared to control diet. Therefore, high levels of dietary copper supplementation in the diet of laying hens can be beneficial for improving shell strength and reducing the cholesterol content of the yolk.

scholarly journals Influence of the Storage Period on the Quality Characteristics of Table Eggs

2018 ◽  
Vol 67 (3-4) ◽  
pp. 202-206
Author(s):  
Mirjana Đukić Stojčić ◽  
Lidija Perić
Keyword(s):  
Weight Loss ◽  
Egg Quality ◽  
Storage Period ◽  
Quality Parameters ◽  
Quality Characteristics ◽  
Breaking Force ◽  
Important Quality ◽  
Battery Cages ◽  
Haugh Unit

Summary The purpose of this study is to examine the effects of the storage period on the quality characteristics of Bovans Brown table eggs. Eggs from 47-week-old hens were sampled on the day of laying and stored in a refrigerator (4°C) for periods of 7, 14, 21, and 28 days. Measurements were performed for each storage period relative to the most important quality parameters of eggs. The following egg parameters were evaluated: weight, weight loss, shell breaking force, albumen height, Haugh units and yolk color. The results obtained show that the albumen height and Haugh unit (HU) were affected by the storage period and are of immense importance. The following parameters were found to be significantly influenced by different storage periods: weight loss (P<0.05), albumen height (P<0.05) and Haugh unit (P<0.01). Rapid reductions in the albumen height were recorded during 7, 14, 21 and 28 days of storage (ranging from 6.90 mm to 6.07mm). Moreover, the Haugh unit values also decreased during storage from 81.27 to 74.89 at 4°C. The present results suggest that the albumen height and the Haugh unit are the most important parameters of egg quality, obtained from commercial layers raised in battery cages, affected by a storage period of 4 weeks.

scholarly journals Xylanase impact beyond performance: A microbiome approach in laying hens

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0257681
Author(s):  
Veerle Van Hoeck ◽  
Ingrid Somers ◽  
Anas Abdelqader ◽  
Alexandra L. Wealleans ◽  
Sandy Van de Craen ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Dietary Supplementation ◽  
Quality Parameters ◽  
Laying Hen ◽  
Control Treatment ◽  
Rrna Gene ◽  
Significant Shift ◽  
Microbial Composition ◽  
16S Rrna Gene Analysis

Anti-nutritional compounds such as non-starch polysaccharides (NSP) are present in viscous cereals used in feed for poultry. Therefore, exogenous carbohydrases are commonly added to monogastric feed to degrade these NSP. Our hypothesis is that xylanase not only improves laying hen performance and digestibility, but also induces a significant shift in microbial composition within the intestinal tract and thereby might exert a prebiotic effect. In this context, a better understanding on whether and how the chicken gut microbial population can be modulated by xylanase is required. To do so, the effects of dietary supplementation of xylanase on performance, apparent total tract digestibility (ATTD) and cecal microbiome in laying hens were evaluated in the present study. A total of 96 HiSex laying hens were used in this experiment (3 diets and 16 replicates of 2 hens). Xylanase was added to the diets at concentrations of 0, 45,000 (15 g/t XygestTM HT) and 90,000 U/kg (30 g/t Xygest HT). The diets were based on wheat (~55%), soybean and sunflower meal. The lowest dosage, 45,000 U/kg, significantly increased average egg weight and improved feed efficiency compared to the control treatment (P<0.05). Egg quality parameters were significantly improved in the experiment in response to the xylanase addition. For example, during the last 28 days of the trial, birds receiving the 45,000 U/kg and the 90,000 U/kg treatments exhibited an increase in Haugh units and albumin heights (P<0.05). Compared with the control, the ATTD of organic matter and crude protein were drastically improved in the 45,000 U/kg treatment group (P<0.05). Furthermore, gross energy and the ATTD of crude fat were improved significantly for birds fed 90,000 U/kg group compared to the control. Importantly, 16S rRNA gene analysis revealed that xylanase at 45,000 U/kg dosage can exert a change in the cecal microbiome. A significant increase in beneficial bacteria (Bacilli class; Enterococcaceae and Lactobacillales orders; Merdibacter, Enterococcus and Nocardiopsis genera; Enterococcus casseliflavus species) was documented when adding 45,000 U/kg xylanase to the diet of laying hens. In conclusion, dietary supplementation of xylanase 45,000 U/kg significantly improved laying hen performance and digestibility. Furthermore, microbiome data suggest that xylanase modulates the laying hen bacterial population beneficially, thus potentially exerting a prebiotic effect.

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