Egg Quality Laying Hens And Light
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. AN EVALUATION OF THE THERMAL AND LUMINOUS ENVIRONMENT OF LAYING HEN AVIARIES EQUIPPED WITH LIGHT-EMITTING DIODE AND COMPACT FLUORESCENT LAMPS AND THEIR EFFECTS ON PRODUCTION AND EGG QUALITY
ABSTRACT The thermal and luminous conditions in aviaries affect the production and quality of eggs. Thus, the aim of the present study was to evaluate the thermal and luminous environment of commercial laying hen aviaries equipped with compact fluorescent (CF) and light-emitting diode (LED) lamps and their influence on egg production and quality. The study w
Eng. Agríc.. Publicado em: 2021-02
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2. FORM OF LAYING HENS EGGS IN THE FUNCTION OF DIFFERENT LAMPS USED IN PRODUCTION
ABSTRACT: Lighting, either in its intensity or in its luminous spectrum, affects the eggs quality. This study evaluated the effect of four lamps (sodium vapor lamp, mercury vapor lamp, fluorescent lamp and incandescent lamp) that have different luminous spectra in the form of commercial poultry eggs. For this, 60 laying hens of the same age were separated fo
Eng. Agríc.. Publicado em: 2017-09
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3. Effect of Led Lighting Colors for Laying Japanese Quails
ABSTRACT Time of exposure and light intensity rearing house may affect the performance and egg quality of laying quails. This research aimed at evaluating the live performance, egg quality, biometry of the reproductive system, and the gastrointestinal tract of Japanese quails (Coturnix coturnix japonica) exposed to artificial light-emitting diodes (LED) of d
Rev. Bras. Cienc. Avic.. Publicado em: 2016-09
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4. Feed type for induced molting of commercial layer hens
An experiment employing three hundred and twenty 81-week-old Lohmann LSL commercial-breed hens was conducted to compare alternative induced-molting methods with the conventional method (fasting). Induced molting lasted 28 days at most, production and quality being monitored for four periods of 28 days thereafter. A completely randomized experimental design w
R. Bras. Zootec.. Publicado em: 2014-03
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5. Limestone particle size and artificial light for laying hens in the second laying cycle
The experiment was conducted to evaluate the effects of limestone particle size and the use of artificial light for laying hens in the second laying cycle. We used 240 Hisex White laying hens at 82 weeks of age in a completely randomized design in a 5 × 2 factorial arrangement, resulting in 10 treatments with 4 replicates of 6 birds. The variables were the
R. Bras. Zootec.. Publicado em: 2013-07
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6. Physical and chemical quality of sanitized commercial eggs experimentally contaminated with Pseudomonas aeruginosa and refrigerated during storage
The objective of this study to verify the physicochemical quality of commercial washed and unwashed eggs, experimentally inoculated on the shell with Pseudomonas aeruginosa and stored at 5 and 25 ºC for 30 days. A total of 384 eggs, classified as large, from light Dekalb White laying hens at 30 to 40 weeks of age, were used. The experimental design consiste
R. Bras. Zootec.. Publicado em: 2012-10
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7. Nutritional reduction of protein and usage of enzyme in the diet of light layers
The objective of this study was to evaluate the reduction of protein, the formulation of diets and supplementation of an enzyme complex for laying hens. The layers were distributed in a completely randomized 2 × 2 × 2 factorial arrangement, with two levels of crude protein reduction (0.0 and 4.0 g/kg), two kinds of diet formulation (without and with reform
R. Bras. Zootec.. Publicado em: 2012-09
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8. NÃveis de fibra na raÃÃo de crescimento e seus efeitos no desempenho de duas linhagens de poedeiras nas fases de crescimento e postura / Fiber levels on growth ration and its effect on performance of two strains of laying in the phase of posture
A presente pesquisa teve como objetivos avaliar os efeitos dos nÃveis de fibra em detergente neutro (FDN) das raÃÃes oferecidas para as frangas na fase de 7 a 17 semanas de idade sobre o desempenho, metabolizaÃÃo da energia da raÃÃo, desenvolvimento dos sistemas digestÃrio e reprodutor de duas linhagens de poedeiras comerciais, bem como os efeitos su
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/03/2010
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9. Cobalt and vitamin B12 in diets for commercial laying hens on the second cycle of production
The supplementation of cobalt and vitamin B12 in diets for commercial laying hens on the second production cycle was studied. Four hundred and eighty light commercial laying hens, Lohmann LSL, were used at initial phase of forced molting laying period. The trial was conducted in a randomized design. The plots were the treatments which were constituted by com
Revista Brasileira de Ciência Avícola. Publicado em: 2003-04