scholarly journals Dietary L-Carnitine Supplementation Improves Albumen Quality of Laying Hens

2005 ◽  
Vol 42 (1) ◽  
pp. 79-83 ◽  
Author(s):  
Kazumi Kita ◽  
Shin-ichi Nakajima ◽  
Jiro Nakagawa
Keyword(s):  
Laying Hens ◽  
Carnitine Supplementation

The use of poly additive Nabicat in the feeding of laying hens

2020 ◽  
pp. 44-55
Author(s):  
S. Nikolaev ◽  
L. Andreenko
Keyword(s):  
Laying Hens ◽  
Optimal Dose ◽  
Control Group ◽  
Nutrient Metabolism ◽  
Volgograd Region ◽  
Mineral Components ◽  
Environmentally Safe ◽  
Experimental Group ◽  
Poultry Farming

In modern poultry farming the most urgent tasks are to search for and test new environmentally safe feed and economically justifi ed additives that stimulate productivity, positively aff ect the health of poultry, and consequently increase the livability of livestock and other important zootechnical traits. In order to maintain physiologically normal processes of life, metabolism and increase the level of productivity of poultry it needs mineral components and their chelated compounds. The purpose of this work was to increase the egg productivity of poultry by using the silicon-containing poly additive Nabicat in feeding young hens and laying hens. The researches have been carried out on the poultry cross Highsex Brown under the environments in CJSC “Poultry Farm “Volzhskaya” in the Sredneakhtubinsky area in the Volgograd region. In this paper, The optimal dose of the introduction of the silicon-containing poly additive Nabicat in the diets of young and laying hens of the cross Highsex Brown has been scientifi cally justifi ed and the biological value of using an organic form of silicon has been determined. The positive infl uence of the optimal dose of poly additive on growth, consumption, and digestibility, nutrient metabolism in the poultry body, as well as egg productivity and quality of the resulting egg has been revealed. Thus, the average egg productivity per 1 hen in the control group during the experiment period was 321,3 pcs., and in the 1st, 2nd and 3rd experimental groups it was 322,6 pcs., 325,8 and 325,7 pcs., which was higher than in the control group by 0,40 %, 1,40 and 1,37 %, respectively. The average egg weight in the 1st experimental group exceeded the control by 0,43 g or 0,68 %, in the 2nd experimental group by 1,16 g or 1,84 %, in the 3rd experimental group by 0,81 g or 1,28 %. The economic eff ectiveness of using the organic silicon additive in the composition of Nabicat poly additive in the feeding of laying hens has been proved. The economic eff ect due to the use of diff erent doses of the introduction of silicon-containing poly additive Nabicat in compound feed for laying hens of the 1st experimental group was 141,66 rubles, the 2nd experimental group 962,76 rubles, and the 3rd experimental group 821,89 rubles.

scholarly journals Metabolizable energy levels for semi-heavy laying hens at the second production cycle

2009 ◽  
Vol 38 (5) ◽  
pp. 857-862
Author(s):  
Fernando Guilherme Perazzo Costa ◽  
Janaine Sena da Costa ◽  
Cláudia de Castro Goulart ◽  
Denise Fontana Figueiredo-Lima ◽  
Raul da Cunha Lima Neto ◽  
...  
Keyword(s):  
Energy Level ◽  
Feed Intake ◽  
Egg Production ◽  
Laying Hens ◽  
Energy Levels ◽  
Metabolizable Energy ◽  
Production Cycle ◽  
Egg Mass ◽  
Feed Conversion

This study was carried out to evaluate the energy levels in the diet to obtain better performance rates and quality of eggs from laying hens in the second production cycle. One hundred and eighty Bovans Goldline laying hens with 62 weeks of age were used during four 28-day periods. A completely randomized experimental design was used with four metabolizable energy levels (2,650, 2,725, 2,800, 2,875 and 2,950 kcal/kg), each with six replicates of six birds. The energy level of diet did not affect the weight of the egg, yolk, albumen and eggshell, the percentages of yolk, albumen and eggshell, yolk color and egg specific gravity. Feed intake, egg production, egg mass and feed conversion per egg mass and per dozen eggs increased significantly with increasing levels of metabolizable energy. Feed intake decreased linearly as the energy level in the diet increased. The metabolizable energy levels showed a quadratic effect on egg production, egg mass and feed conversion per egg mass and per dozen eggs. The metabolizable energy level of 2,830 kcal/kg was the most appropriate to promote better performance and quality of eggs from laying hens in the second production cycle.

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.

scholarly journals Influence of unconventional feed supplement on productivity and quality of laying hens

2020 ◽  
Author(s):  
Л.И. НАУМОВА ◽  
А.А. ЛУКАШИНА
Keyword(s):  
Laying Hens ◽  
Raw Materials ◽  
Brown Seaweed ◽  
Positive Influence ◽  
Feed Conversion ◽  
Feed Supplement ◽  
Pine Cone ◽  
Effective Use ◽  
Unconventional Feed

Показана эффективность использования в рационах промышленных кур-несушек натуральных кормовых добавок, изготовленных из сырья растительного происхождения (элеутерококка колючего, морской бурой водоросли, патринии скабеозолистной, крапивы двудомной, муки из шелухи шишек кедрового ореха). Выявлено положительное влияние кормовых добавок на обменные процессы в организме кур, что способствовало повышению их производительных качеств и снижению коэффициента конверсии корма. The results of effective use of the spiny eleuterococcus, brown seaweed, Dahurian patrinia, common nettle, flour from pine cone shell as the feed supplement from raw materials of plant origin in addition to the main ration of industrial laying hens are presented in this publication. The positive influence of the feed supplements on metabolic processes in the hen organisms was discovered and this fact contributed the increase of productive qualities and improvement of feed conversion.

scholarly journals Beyaz Yumurtacı Saf Hatlarda Yumurta Kalitesi Üzerine Yaş ve Kafes Katının Etkisi

2019 ◽  
Vol 7 (sp1) ◽  
pp. 173
Author(s):  
Hasan Eleroğlu
Keyword(s):  
Laying Hens ◽  
White Layer ◽  
Pure Line ◽  
Shape Index ◽  
External Quality ◽  
Egg Weight ◽  
Temperature And Humidity ◽  
Effect Of Age ◽  
Haugh Unit

In this study, the effects of coat difference and breeding age on the internal and external quality of the eggs were investigated in white laying hens in different cages. The eggs obtained from a total of one hundred fifty eggs White layer pure line hens at 24, 28, 32, 36 and 40 weeks of age that housing in individual cages in the Ankara Poultry Research Institute were used. Shape Index, egg weight (g), albumen height (mm), Roche scale, Haugh unit and shell strength (N) values were examined in 438 eggs obtained from these chickens found in these cages which are three tiers as upper, middle and bottom. In addition, temperature and humidity values in the tiers were recorded at 30-minute intervals during the study and then they were analysed. Statistically significant differences were calculated between temperature and humidity values measured in tiers. Although there was no difference between the tiers in terms of shape index and egg weight, the effect of age was significant. The effect of age and tiers difference on albumen height (mm) was insignificant. The Roche scale and shell strength (N) values were significantly influenced by the tier difference and breeding age. In general, it was concluded that the effect of the tier difference on the Haugh unit was insignificant, but the age was found to have an effect on the Haugh unit.

scholarly journals Effects on egg production and quality of supplementing drinking water with calcium and magnesium

2021 ◽  
Vol 51 (4) ◽  
pp. 469-476
Author(s):  
X.J. Yi ◽  
A. Rehman ◽  
R.W. Akhtar ◽  
A. Abbas ◽  
K. Hussain ◽  
...  
Keyword(s):  
Drinking Water ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Production Performance ◽  
Egg Weight ◽  
Calcium And Magnesium ◽  
Eggshell Colour ◽  
Haugh Unit

This study was conducted to appraise the effects on egg quality and production performance of laying hens when drinking water was supplemented with calcium (Ca) and magnesium (Mg). A total of 384 (64-week-old) Hy-line Brown laying hens were assigned at random to four treatments, which consisted of CON: unsupplemented drinking water; T1: drinking water + 2 mg/L Ca + 250 mg/L Mg; T2: drinking water + 4 mg/L Ca + 510 mg/L Mg /10 L; and T3: drinking water + 5 mg/L Ca and 760 mg/L Mg. The experiment lasted six weeks. Water intake increased linearly in week 1 with the rising levels of Ca and Mg in the drinking water. Increasing the Ca and Mg levels improved eggshell strength (week 2 (P =0.01), week 5 (P =0.01), and week 6 (P = 0.03), and eggshell thickness (week 6) (P =0.02) and reduced the rate at which eggs were broken (week 4) (P =0.01). The supplemental Ca and Mg did not affect egg production, egg weight, Haugh unit, albumen height, eggshell colour, and yolk colour compared with CON. Nor did they influence the Haugh unit and albumen height after storing for 1, 5, 10 and 15 days. In conclusion, adding Ca and Mg to the drinking water increased the thickness and strength of the eggshells.

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