scholarly journals Effect of Citric Acid, Phytase and Calcium Levels on the Calcium and Phosphorus Content in Egg: Yolk-Albumen and Shell, Yolk Color and Egg Quality in Diets of Laying Hens

2016 ◽  
Vol 07 (14) ◽  
pp. 1364-1374
Author(s):  
Lily M. Vargas-Rodríguez ◽  
Jesús E. Morales-Barrera ◽  
José G. Herrera-Haro ◽  
Juan Antonio-Bautista ◽  
Roberto López-Pozos ◽  
...  
Keyword(s):  
Citric Acid ◽  
Phosphorus Content ◽  
Laying Hens ◽  
Egg Quality ◽  
Egg Yolk ◽  
Calcium And Phosphorus

scholarly journals EDIBLEEGGQUALITYWHENIODINEISINTRODUCEDINTOLAYINGHENBODY

2021 ◽  
pp. 65-70
Author(s):  
L.V. Rastopshina ◽  
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Federal District ◽  
Egg Yolk ◽  
Egg White ◽  
Egg Laying ◽  
The Body ◽  
Control Group ◽  
Trace Element Deficiency

The Altai Region along with the regions of the Siberian Federal District belongs to the zone with trace element deficiency including iodine deficiency. The research goal was to study the effect of iodine on edible egg quality of laying hens of the Rodonit cross. At the final stage of egg-laying, 4 groups of 4 laying hens were formed. No iodine was administered to the hens of the 1st control group. Starch-based iodine product was administered to the birds of the 2nd, 3rd and 4th trial groups into the lower third of the neck, under the wing and into the rump area in a dose of 1.5 mg per head. The egg production intensity in the trial groups was higher by 21.3-28.8%. Egg weight in the 1st control group was 65.6 ± 1.33g which was lower than that in the trial groups by 4.4% (2nd group); 3.7% (3rd group) and 1.5% 4th group). All eggs belonged to “select” grade. The 3rd and 4th trial groups had less egg white by 3.8 and 2.7%; the egg-yolk content increases in the eggs of the 2nd, 3rd and 4th trial groups by 1.2%, 9.4% and 2.4%, respectively, and the eggshell weight by 1.2-9.4% as com-pared to the control. The ratio of egg white and egg-yolk weight in the eggs of the trial groups was lower than in the control group by 9.38-19.29%, but the ratio of egg-yolk to egg white was by 10.4-23.9% higher. The following indices were higher in the trial groups as compared to the control: egg white index -by 1.4-17.1%; egg-yolk -by 3.2-6.4%; Haugh unit -by 7.2-11.1%; eggshell thickness -by 3.9-8.3%. The best results were obtained with the administra-tion of iodine to the hens in the region of the lower third of the neck. The enrichment of the body of laying hens of the Rodonit cross with iodine makes it possible to obtain the profitability of edible egg production at the level of 28.6-41.0%.

scholarly journals Supplementation of spirulina (Spirulina platensis) on yolk colour, egg quality and production performance of laying hens

2018 ◽  
Vol 34 (2) ◽  
pp. 71-78
Author(s):  
M Ahammed ◽  
S Sharmin ◽  
A Khatun ◽  
KMS Islam
Keyword(s):  
Spirulina Platensis ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Dietary Supplementation ◽  
Egg Yolk ◽  
Production Performance ◽  
Dietary Treatments

A total of 96 Shaver 579 laying hens of 78 weeks of age were studied for the effects on egg production of dietary supplementation with spirulina (Spirulina platensis). The hens were divided into four dietary treatments with six replications of four birds in each group. Birds of three groups were supplemented with 0.1%, 0.2% and 0.3% spirulina and one group was kept as control. Yolk colour significantly improved (P<0.01) as compared to control, without affecting any other production performances. It is suggested that dietary supplementation of spirulina at 0.2 to 0.3% levels in aged laying hens enhanced egg yolk colour. Bangl. vet. 2017. Vol. 34, No. 2, 71-78

scholarly journals Egg performance, egg quality, and nutrient utilization in laying hens fed diets with different levels of rapeseed expeller cake

2008 ◽  
Vol 19 (3) ◽  
pp. 233 ◽  
Author(s):  
S. SWIATKIEWICZ ◽  
J. KORELESKI ◽  
A. ARCZEWSKA-WLOSEK
Keyword(s):  
Crude Protein ◽  
Laying Hens ◽  
Egg Quality ◽  
Nutrient Utilization ◽  
Metabolizable Energy ◽  
Available Phosphorus ◽  
Dietary Level ◽  
Calcium And Phosphorus ◽  
Egg Performance ◽  
Different Levels

The aim of this study was to evaluate the effect of different levels of rapeseed expeller cake (RC) in the diet of laying hens on egg performance, egg quality, retention and excretion of nitrogen, calcium and phosphorus, and metabolizability of energy. The experiment was carried out with 72 Bovans Brown hens, from 28 to 53 weeks of age. Experimental treatment consisted of four isonitrogenous and isocaloric corn-soybean diets (as calculated: 17% crude protein, 11.6 MJ/kg metabolizable energy, 0.81% lysine, 0.36% methionine, 3.60% calcium and 0.37% available phosphorus), containing 0, 4, 6 or 8% RC. The RC used was produced from double zero rapeseed and contained 29.3% crude protein, 17.4% crude fat, 10.8% crude fibre, 0.63% calcium, 0.97% phosphorus, 1.91% lysine and 0.84% methionine. During the experimental period, the dietary level of RC had no significant effects on egg performance and egg quality parameters. Boiled eggs from hens fed a diet with 8% RC were characterized by an inferior flavour to those from other groups. There were no treatment effects on nitrogen balance or metabolizability of energy, though the highest dietary level of RC negatively affected retention and excretion of calcium and phosphorus.;

scholarly journals The response of laying hens fed fermented pineapple peel waste by indigenous microorganism from bamboo sprout

2020 ◽  
Vol 21 ◽  
Author(s):  
Heryandi YAN ◽  
Yanti Putri NOVA ◽  
Adrizal ADRIZAL ◽  
Endo Mahata MARIA
Keyword(s):  
Shell Thickness ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Egg Yolk ◽  
Indigenous Microorganism ◽  
Pineapple Peel ◽  
Negative Effect ◽  
Egg Shell ◽  
Haugh Unit

ABSTRACT The bromelain enzyme content in pineapple peel waste predicted to promote digestive tract health and a positive effect on egg quality. This research aimed to evaluate the use of fermented pineapple peel waste in laying hens diet on egg quality. A total of laying hens 200 birds with Isa Brown strain, egg production of 70%, The average egg weight and body weight were 58.58 g/egg, and 1.62 g/bird, respectively. A completely randomized design was used, 5 different levels of fermented pineapple peel waste as treatment (0, 5, 10, 15, and 20%), and all treatments were repeated 4 times. Egg shell thickness, egg shell strength, haugh unit, egg yolk fat, and egg yolk color were measured. The use of fermented pineapple peel waste in the diet of laying hens up to 20% highly significant (P<0.01) on egg yolk color, and did not negative effect (P>0.05) on egg shell thickness, egg shell strength, haugh unit, and egg yolk fat. Fermented pineapple peel waste can be used as much as 20% in laying hens diet without disturbing egg quality and improve egg yolk color.

scholarly journals Supplementation of two sources and three levels of iodine in the diet of laying hens: effects on performance, egg quality, serum and egg yolk lipids, antioxidant status, and iodine accumulation in eggs

2020 ◽  
Vol 19 (1) ◽  
pp. 974-988
Author(s):  
Sima Sarlak ◽  
Sayed Ali Tabeidian ◽  
Majid Toghyani ◽  
Amir Davar Foroozandeh Shahraki ◽  
Mohammad Goli ◽  
...  
Keyword(s):  
Antioxidant Status ◽  
Laying Hens ◽  
Egg Quality ◽  
Egg Yolk

scholarly journals Effects of feed supplementation with manganese from its different sources on performance and egg parameters of laying hens

2014 ◽  
Vol 59 (No. 4) ◽  
pp. 147-155 ◽  
Author(s):  
K. Venglovská ◽  
Ľ. Grešáková ◽  
I. Plachá ◽  
M. Ryzner ◽  
K. Čobanová
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Protein Hydrolysate ◽  
Basal Diet ◽  
Egg Yolk ◽  
Control Group ◽  
Feed Supplementation ◽  
Positive Effects ◽  
Dietary Treatments

The objective of this study was to compare the effects of feed supplementation of laying hens with manganese from its inorganic and organic sources on performance and some parameters of egg quality. Ninety-six hens at 20 weeks of age were randomly allocated to 4 dietary treatments, each consisting of 6 replicates (4 birds per replicate). The control group was fed unsupplemented basal diet (BD) with only natural background Mn level of 46.4 mg/kg feed. For the three experimental treatments, the BD was supplemented with 120 mg Mn/kg either from Mn-sulphate or Mn-chelate of protein hydrolysate (Mn-Pro) or Mn-chelate of glycine hydrate (Mn-Gly). After 8 weeks of dietary treatments the egg production, egg weight, feed intake, and feed efficiency were not affected by dietary treatments. Regardless of the sources, Mn supplementation to feed resulted in significantly decreased percentages of cracked eggs compared to the unsupplemented control group. The thickness, weight, proportion, and index of eggshell were significantly elevated in all groups supplemented with Mn. The intake of Mn-Gly resulted in considerably increased Mn deposition in egg yolk compared to the control eggs. In the control and Mn-sulphate groups yolk malondialdehyde (MDA) started to increase after 20 and 30 days of egg storage respectively, whereas in eggs from hens given organic Mn-sources this parameter was not affected up to 40 days. Although there were no significant differences in MDA values between the treatments until 20 days of storage, the Mn-sulphate group showed significantly higher MDA concentration in yolks compared to the control group after 30 days of storage. These results demonstrate that supplementation of hens&rsquo; diet with Mn has positive effects on eggshell quality. Feed supplementation with Mn from organic sources appears to be more effective in preventing yolk lipid oxidation during cold storage of eggs than that from Mn-sulphate. &nbsp;

scholarly journals Performance of laying hens fed on practical diets containing different levels of supplemental biotin during the rearing and laying stages

1980 ◽  
Vol 44 (2) ◽  
pp. 151-159 ◽  
Author(s):  
C. C. Whitehead
Keyword(s):  
Egg Size ◽  
Laying Hens ◽  
Egg Quality ◽  
Egg Yolk ◽  
Egg Laying ◽  
Apparent Effect ◽  
Laying Performance ◽  
Egg Number ◽  
Biotin Supplementation ◽  
Different Levels

1. The effect of biotin supplementation of low-biotin practical diets during rearing and laying stages on performance was studied in White Leghorn-type laying hens.2. Biotin supplementation during rearing did not have any apparent effect on the condition of the bird at point-of-lay or on subsequent laying performance.3. Biotin supplementation during lay did not have any beneficial effect upon egg number, egg size or food intake or food conversion efficiency.4. Internal egg quality, as reflected by albumen height, was slightly improved by biotin supplementation of layer's diet.5. Input-output relationships were calculated for the incorporation of biotin in egg yolk.6. Metabolic measurements suggested that biotin concentration in egg yolk was the best criterion of biotin status in the hen.7. It is concluded that practical diets contain sufficient biotin to support optimum egg-laying performance in hens.

scholarly journals Possibility of Using Astaxanthin-Rich Dried Cell Powder from Paracoccus carotinifaciens to Improve Egg Yolk Pigmentation of Laying Hens

Symmetry ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 923
Author(s):  
Masaki Honda ◽  
Yuki Kawashima ◽  
Kazuaki Hirasawa ◽  
Takeshi Uemura ◽  
Sun Jinkun ◽  
...  
Keyword(s):  
High Performance ◽  
Laying Hens ◽  
Egg Quality ◽  
Egg Yolk ◽  
Solvent System ◽  
Average Particle ◽  
Isomer Ratio ◽  
Quality Aspects ◽  
Egg Yolks ◽  
Feeding Diets

The study investigated egg quality aspects such as astaxanthin concentration, E/Z-isomer ratio, and yolk color in laying hens fed with astaxanthin-containing diets. Dried Paracoccus carotinifaciens cell powder (Panaferd-AX) and fine cell powder (Panaferd-P) were used as sources of astaxanthin, with average particle diameters of approximately 100 μm and 10 μm, respectively. Paracoccus carotinifaciens contains valuable rare carotenoids such as adonirubin and adonixanthin, and thus the concentrations of these carotenoids in egg yolk were also evaluated. The E/Z-isomer ratios of the egg yolk carotenoids were determined by normal-phase high-performance liquid chromatography (HPLC) with an improved solvent system. Feeding diets containing P. carotinifaciens resulted in increased concentrations of astaxanthin, adonirubin, and adonixanthin in egg yolk, as well as a marked increase in the yolk color fan score; values associated with the Panaferd-P-containing diet were higher than those associated with the Panaferd-AX-containing diet. For example, the astaxanthin concentration in egg yolks of hens fed with the Panaferd-AX- and Panaferd-P-containing diets for 21 days were 1.21 μg/g and 1.85 μg/g, respectively. This indicates that the pulverization treatment of the P. carotinifaciens powder increased the efficiency of carotenoid accumulation in the egg yolk. Moreover, more than 95% of astaxanthin in P. carotinifaciens was present as the all-E-isomer. However, approximately 25% of astaxanthin in egg yolk was present as the Z-isomers. In recent years, astaxanthin Z-isomers have attracted substantial attention as they exhibit a greater bioavailability and bioactivity than the all-E-isomer. These data are important not only for understanding egg yolk pigmentation but also for improving the nutritional value of hens’ egg yolk through the addition of P. carotinifaciens to their diet.

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