scholarly journals The effects of a higher amount of iodine supplement on the efficiency of laying hens fed extruded rapeseed and on eggshell quality

2011 ◽  
Vol 49 (No. 5) ◽  
pp. 199-203 ◽  
Author(s):  
M. Lichovniková ◽  
L. Zeman
Keyword(s):  
Mass Production ◽  
Laying Hens ◽  
Marked Effect ◽  
Weight Ratio ◽  
Egg Mass ◽  
Eggshell Thickness ◽  
Mass Ratio ◽  
Eggshell Quality ◽  
Different Levels

The objective of this experiment was to study the effects of feeding 6.07 mg/kg of iodine in comparison with 3.57 mg/kg of iodine as a supplement in diets with different levels of extruded rapeseed (4.5, 9.0 and 13.5%) for a period of 52 weeks. The higher amount of iodine had the most marked effect on the egg mass production and on the feed : egg mass ratio when the hens were fed 9.0% extruded rapeseed in the diet. The egg mass production increased from 55.5 ± 1.06 g/d to 57.8 ± 1.12 g/d and the feed : egg mass ratio was improved from 2.15 kg/kg to 2.02 kg/kg. The eggshell weight ratio significantly (P < 0.05) increased in all groups with the higher level of iodine. The higher level of iodine significantly (P < 0.05) increased eggshell thickness in the groups with 9.0 and 13.5% of extruded rapeseed and it also significantly (P < 0.01) increased eggshell strength in the groups with 4.5 and 9.0% of rapeseed in the diets.  

scholarly journals Eggshell characteristics and cuticle deposition in three laying hen genotypes housed in enriched cages and on litter

2017 ◽  
Vol 63 (No. 1) ◽  
pp. 11-16 ◽  
Author(s):  
M. Ketta ◽  
E. Tumova
Keyword(s):  
Laying Hens ◽  
Quality Parameters ◽  
Laying Hen ◽  
Housing System ◽  
Eggshell Thickness ◽  
System Effect ◽  
Egg Weight ◽  
Housing Systems ◽  
Eggshell Quality ◽  
System P

The objective of the present study was to compare the eggshell characteristics and cuticle deposition of Lohmann Brown, Hy-Line Silver Brown, and Isa Brown layers kept in two different housing systems. The three laying hen genotypes were housed in enriched cages (100 hens, 750 cm<sup>2</sup>/hen, 10 hens/cage) and in littered pens (100 hens, 9 hens/m<sup>2</sup>, 10 hens/pen). The experiment was carried out in weeks 40–56 of hens age. Non-significant interactions of genotype and housing system for eggshell quality parameters and cuticle deposition were detected in this study. Egg weight was significantly affected by genotype (P ≤ 0.001) and housing system (P ≤ 0.043). The heaviest eggs were laid by Lohmann Brown, while the lightest eggs were produced by Hy-Line Silver Brown. Eggshell strength was not affected by genotype and housing system, however, genotype had a significant effect on eggshell thickness (P ≤ 0.033). Isa Brown eggs had thicker eggshells compared to Lohmann Brown and Hy-Line Silver Brown. However, a non-significant effect of housing system on eggshell thickness was observed. Eggshell percentage was significantly affected by both genotype and housing system. Genotype of laying hens had a significant effect on cuticle deposition; significantly higher cuticle deposition was observed in Lohmann Brown eggs (P ≤ 0.001). It could be concluded that genotype had a significant effect on eggshell quality parameters and cuticle deposition. However, the housing system effect was less important in these characteristics.

scholarly journals Effects of phytase B on laying performance, eggshell quality and on phosphorus and calcium balance in laying hens fed phosphorus-deficient maize-soybean meal diets

2011 ◽  
Vol 56 (No. 9) ◽  
pp. 406-413 ◽  
Author(s):  
K. Żyła ◽  
M. Mika ◽  
S. Świątkiewicz ◽  
J. Koreleski ◽  
J. Piironen
Keyword(s):  
Soybean Meal ◽  
Calcium Level ◽  
Laying Hens ◽  
Breaking Strength ◽  
Control Diet ◽  
Egg Mass ◽  
Calcium Balance ◽  
Egg Weight ◽  
Eggshell Quality ◽  
Laying Performance

A study was conducted to evaluate the effects of dietary supplementation of phytase B (product of the Aspergillus niger phyB gene expressed in Trichoderma reesei) on feed intake, laying performance, eggshell quality, and on phosphorus and calcium balance in laying hens. Seventy-two, 40 weeks old Hy Line Brown hens were fed for 14 weeks the following four phosphorus-deficient (0.12% nonphytate phosphorus, NPP), maize-soybean meal-based diets: (1) calcium-deficient (2.8% Ca) control diet; (2) diet 1 + phytase B at the activity of 2.5&nbsp;acid phosphatase units (AcPU/kg); (3) control diet (3.8% Ca); (4) diet 3 + phytase B at the activity of 2.5 AcPU/ kg. Each dietary treatment was fed to 18 cages of hens, 1 hen/cage kept in individual cages. Hens fed the NPP- and Ca-deficient diets consumed more feed (P &lt; 0.01) and excreted less calcium (P &lt; 0.01) than those receiving P-deficient diets with the standard calcium level. There were no effects of calcium level on feed utilization, egg mass, egg weight, and eggshell breaking strength. Egg production, although numerically higher in hens fed low Ca diets with no enzyme added, failed to be significantly different due to the low number of hens investigated and therefore the measurement should be considered as preliminary and supplementary. Phytase B increased mean egg weight by about 7% in layers fed the NPP- and Ca-deficient diet (Ca &times; phytase B interaction, P &lt; 0.05), increased shell breaking strength, particularly at the standard calcium level, significantly enhanced amounts of calcium retained by layers and amounts of&nbsp; phosphorus retained by hens fed the Ca-deficient diets. Additionally, phytase B improved Ca retention at both dietary Ca levels and phosphorus retention in hens fed the Ca-deficient diets. Results of the study indicate that the efficacy of phytase B in NPP-deficient diets is strongly influenced by the dietary calcium level and the enzyme may modulate egg weight, eggshell quality, phosphorus and calcium retention in laying hens fed low-NPP, maize-soybean meal-based diets.

scholarly journals Laying performance and eggshell quality in laying hens fed diets supplemented with prebiotics and organic acids

2010 ◽  
Vol 55 (No. 7) ◽  
pp. 294-306 ◽  
Author(s):  
S. Świątkiewicz ◽  
J. Koreleski ◽  
A. Arczewska
Keyword(s):  
Organic Acids ◽  
Egg Production ◽  
Volatile Fatty Acids ◽  
Laying Hens ◽  
Feed Additives ◽  
Egg Mass ◽  
Positive Effects ◽  
Eggshell Quality ◽  
Laying Performance ◽  
Calcium And Phosphorus

The aim of the study was to evaluate the effect of organic acids and the prebiotic fructans on egg production and eggshell quality when added to the layer diet with different levels of calcium and phosphorus. The experiment was carried out on 168 Bovans Brown hens, allocated to 14 groups of 12 replications. Each hen (replication) was kept in an individual cage 40 cm &times; 40 cm in size. A 2 &times; 7 factorial arrangement, with two dietary levels of calcium and phosphorus (normal &ndash; 3.70% Ca, 0.65% P, and reduced &ndash; 3.25% Ca, 0.60% P) and with diets supplemented by selected additives (none, 0.75% inulin, 0.75% oligofructose, 0.50% volatile fatty acids (VFA), 0.25% medium chain fatty acid (MCFA), 0.30% VFA + 0.20% MCFA, 0.75% inulin + 0.50% VFA) was used. The experiment was carried out over 34 weeks, from the age of 26 to 70 weeks. There were no statistically confirmed effects of the factors studied in this experiment on egg performance, i.e. laying rate, egg mass, feed intake and feed conversion. Reducing the dietary levels of Ca and P significantly decreased eggshell percent, thickness, density and breaking strength. The additives used had a considerable effect on eggshell quality at 46, 58 and 70 weeks of age, and these positive effects were most pronounced in the case of inulin and MCFA. There was no significant interaction between Ca and P dietary levels and the additives used. It was thus concluded that selected feed additives which lower the pH of the diet and intestinal content can beneficially influence eggshell quality in older high-producing laying hens. &nbsp;

scholarly journals Effects of Genotype, Age and Their Interaction on Egg Quality in Brown-Egg Laying Hens

2009 ◽  
Vol 78 (1) ◽  
pp. 85-91 ◽  
Author(s):  
Lukáš Zita ◽  
Eva Tůmová ◽  
Ladislav Štolc
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Quality Characteristics ◽  
Egg Laying ◽  
Eggshell Thickness ◽  
Egg Weight ◽  
Eggshell Quality ◽  
Ad Libitum ◽  
Quality Measurements

The experiment compared the effects of strain and age on egg quality characteristics in ISA Brown, Hisex Brown and Moravia BSL brown-egg laying hens. One hundred and eight ISA Brown hens, forty-five Hisex Brown and forty-five Moravia BSL 20 to 60 weeks old were housed in conventional cages (550 cm2 per hen). Feed and water were available ad libitum. Eggs were sampled at 21-day intervals, every collecting week 150 eggs per genotype in three age periods, from 20 to 26 weeks, 37 to 43 weeks and 54 to 60 weeks of age. A total of 4,050 eggs were examined. Egg quality characteristics were affected by genotype and age. Egg weight, yolk weight and percentage, Haugh Units increased with the hens’ age in all genotypes, but albumen and eggshell percentage decreased, eggshell thickness and strength improved with age. The highest egg weight (65.3 g) and yolk quality (yolk index 45.1%) were found in Moravia BSL at the end of the experiment. In contrast, the best albumen quality (albumen percentage 60.0) values were in Hisex Brown and the eggshell quality measurements (eggshell thickness 0.38 mm) were higher in ISA Brown.

scholarly journals The Effects of Different Levels Chlorell Microalgae on Performance and Immune Response of Laying Hens Under Heat Stress Condition

2015 ◽  
Vol 9 (2) ◽  
pp. 71-74 ◽  
Author(s):  
Nasroallah Moradi Kor ◽  
Neda Mohamadi
Keyword(s):  
Immune Response ◽  
Heat Stress ◽  
Egg Production ◽  
Stress Condition ◽  
Linear Models ◽  
Laying Hens ◽  
Egg Mass ◽  
Randomized Design ◽  
Heat Stress Condition ◽  
Different Levels

This study was conducted to determine the effects of different levels microalgae Chlorell sp. on performance of laying hens under heat stress condition. A completely randomized design experiment, with 7 replicates and 6 treatments (9 birds per replicate) was carried out by allotting 378 white Lohman strain laying hens at 65 weeks of age. Six experimental treatments were continual addition of 0, 100, 200, 300,400 ppm microalgae Chlorell and 400 ppm toein to drinking warer were fed to laying hens for 9 weeks. Egg production, egg weight, egg mass output and feed intake were determined. Antibody production against sheep red blood cells (SRBC) also was measured. Data  were  analyzed  by  ANOVA  using  General  Linear Models procedure of  SAS software and comparison of means  were  compared  using  Duncan’s  multiple  range test. The results of this experiment showed that microalgae Chlorell had no effect on productive performance. Adding microalgae Chlorell to the drinking water improved immune response of laying hens and a more positive effect was observed when 400 ppm added to the water. It is concluded that the addition of microalgae Chlorell to the water drinking of laying hens improved immune response of laying hens.DOI: http://dx.doi.org/10.3126/ijls.v9i2.12058 International Journal of Life Sciences 9 (2) : 2015; 71-74

scholarly journals Flour of mushroom Agaricus blazei as additive functional in food of laying hens

2019 ◽  
Vol 20 ◽  
Author(s):  
Iolanda Silveira Freitas ◽  
Michele de Oliveira Mendonça ◽  
Izabela Silveira Freitas ◽  
Onofre Barroca de Almeida Neto ◽  
David Garcia Ferreira ◽  
...  
Keyword(s):  
Immune System ◽  
Feed Intake ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Experimental Unit ◽  
Egg Mass ◽  
Agaricus Blazei ◽  
Feed Conversion ◽  
Different Levels

SUMMARY The current study aims to evaluate the zootechnical performance, quality of eggs, and the immune system of the laying hen's upon supplementing their feed with the flour of the mushroom Agaricus blazei. A total of 210 Hisex Brown® hens, 67 weeks old, were distributed in a completely randomized design with five treatments (control [0%], 0.04%, 0.08%, 0.12% and 0.16% of mushroom meal) with seven replicates and six birds per experimental unit. Were evaluated the zootechnical performance (feed intake, egg production [per day and housed], marketable egg production, egg weight and egg mass, feed conversion per dozen and egg mass, and viability);egg quality (specific weight, Haugh units, weight and percentage of components, shell thickness and yellow intensity of the egg yolks); and the hemogram (erythrogram and leukogram). Mainly, different levels of mushroom meal, were includedin laying hens feeds significantly (p<0.05)egg mass and feed intake. However, the leukogram and the erythrogram remained within the reference values, indicating that the birds were healthy. The addition of different levels of Agaricus blazei flour in the laying hens feed did not promote changes in the egg quality, in the immune system, and in the zootechnical performance, except for the feed intake which reduced with the inclusion of mushroom flour and eggs mass in which the 0.07% level promoted the maximization of this parameter.

scholarly journals Yumurtlayan Bıldırcın Rasyonlarına Portakal Kabuğu Yağı İlavesinin Performans, Kabuk Kalitesi ve Bazı Serum Parametreleri Üzerine Etkisi

2020 ◽  
Vol 8 (8) ◽  
pp. 1773-1777
Author(s):  
Behlül Sevim ◽  
Osman Olgun ◽  
Esra Tuğçe Şentürk ◽  
Alp Önder Yıldız
Keyword(s):  
Mineral Metabolism ◽  
Orange Peel ◽  
Cholesterol Concentration ◽  
Control Group ◽  
Phosphorus Concentration ◽  
Eggshell Thickness ◽  
Eggshell Quality ◽  
Orange Peel Oil ◽  
Different Levels ◽  
Peel Oil

The aim of this study is to determine the effects of adding different levels (0, 50, 100, 200, 300 and 400 mg/kg) of orange peel oil to the laying quail diets on performance, eggshell quality and some serum parameters. During the experiment, a total of 120 female Japanese quails at the age of 20 weeks were randomly distributed to 6 treatment groups with 4 replicates, each with 5 quail, for six weeks. The supplementation of different levels orange peel oil to the diets did not affect the performance and eggshell quality parameters, except for eggshell thickness. Eggshell thickness was significantly reduced with the addition of orange peel oil to the diet, and this decrease was more pronounced at the level of 200 mg / kg. Serum glucose, creatinine, albumin, globulin, total protein, ALT and AST concentrations were not affected by orange peel oil. Serum cholesterol concentration considerably declined with the supplementation of 400 mg / kg orange peel oil to the diet. Serum calcium level significantly improved with the addition of 100 and 200 mg / kg orange peel oil to the diet compared to the control group. Additionally, serum phosphorus concentration was considerably increased by 100 mg / kg and more levels orange peel oil. According to these results, it is possible to say that the orange essential oil has the effect of reducing cholesterol at 400 mg / kg and improving mineral metabolism at 100 mg / kg, but this positive effect could not prevent the decrease in eggshell thickness.

scholarly journals The Excretion of Ca, Mg, Zn and Cu Through Excreta of Laying Hens Fed Two Different Levels of Protein with and without Phytase

2019 ◽  
Vol 7 (1) ◽  
pp. 68
Author(s):  
Skender Muji ◽  
Alltane Kryeziu ◽  
Muhamet Kamberi ◽  
Ragip Kastrati ◽  
Nuridin Mestani
Keyword(s):  
Crude Protein ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Mass ◽  
Egg Weight ◽  
Forced Draft Oven ◽  
Forced Draft ◽  
Dietary Treatments ◽  
Mg Content ◽  
Different Levels

An 8-week experiment was conducted to study the effect of added Natuphos® 5000 phytase in corn–soybean meal-based diets on laying hens fed different levels of crude protein (CP) (14 and 17%). Two levels of phytase enzyme were used: 0 and 600 Phytase Units (FTU)/kg feed. The experiment used 144 Hisex Brown laying hens in a 2 × 2 factorial design. Four treatments and three replicates per treatment with 12 hens per replicate were used. Egg production was recorded daily while egg weight was assessed on 13th and 14th day of each two-week period to calculate total egg mass. Total excreta were collected and approximately 10% of the amount was used for analysis after drying in a forced draft oven. The results showed no significant effect of added phytase on excreta Calcium (Ca) content, but significantly lower Magnesium (Mg) content was observed with phytase (3.54, 2.48, 3.13 and 2.75 % for hens fed 14% CP no phytase, 14% CP + phytase, 17% CP no phytase, and 17% CP + phytase, respectively). Added phytase also significantly decreased Mg excretion measured as grams/kg of egg mass (21.43, 12.47, 16.76 and 14.75 g/kg egg mass for hens of respective dietary treatments. Phytase had a strong effect on Zink (Zn) levels with 438.96, 369.17, 434.38 and 374.58 mg Zn/kg dry excreta of hens. Similar results were observed with Cu. Added phytase significantly reduced the excreta content and the excretion of Cu. The results of this experiment indicate that adding 600 FTU to laying hen diets containing 14% CP decreases the excretion of Mg, Zn and Cu without any adverse effects on the egg mass produced of laying hens.

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