Laying Hens
Mostrando 13-24 de 222 artigos, teses e dissertações.
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13. Diagnosis of Gallibacterium Anatis in Layers: First Report in Turkey
ABSTRACT Gallibacterium anatis, a member of the Pasteurellaceae family, leads to decrease in egg-production, animal welfare and increase in mortality. This study aimed to diagnose G. Anatis, which caused economic losses in laying hens by using conventional and molecular techniques. In this study, G. anatis was examined from a total of 200 dead chicken tissue
Braz. J. Poult. Sci.. Publicado em: 11/11/2019
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14. Impact of agro-farming activities on microbial diversity of acidic red soils in a Camellia Oleifera Forest
ABSTRACT The production of Camellia oleifera (oil tea), typically planted in acidic red soils in southern China, is limited by low soil fertility. Agro-farming is one way to promote soil fertility by increasing organic matter and microbial communities. To understand the impact of agro-farming activity on soil fertility, three types of agro-farming, namely, r
Rev. Bras. Ciênc. Solo. Publicado em: 14/10/2019
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15. Diagnosis of Brachyspira pilosicoli, Brachyspira hyodysenteriae and Brachyspira intermedia in hens and laying hens in the western region of Paraná through bacterial isolation and identification in qPCR
RESUMO: Bactérias do gênero Brachyspira podem ocasionar enfermidades entéricas em aves acarretando a queda de produtividade. A ocorrência desta enfermidade em galinhas já foi verificada em países como a Austrália, Itália e Estados Unidos, porém no Brasil, até o momento, trabalhos epidemiológicos sobre a frequencia de Brachyspira sp. só foram real
Pesq. Vet. Bras.. Publicado em: 30/09/2019
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16. Dietary intake of broiler breeder hens during the laying period affects amino acid and fatty acid profiles in eggs
ABSTRACT The objective of this study was to evaluate the effects of maternal dietary intake on the amino acid and fatty acid contents in eggs during the laying period. An experiment with a 2×2 factorial design was conducted with two maternal dietary intake levels (100 and 75% of dietary intake recommended by the Chinese Ministry of Agriculture) and two broi
R. Bras. Zootec.. Publicado em: 12/09/2019
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17. Severe Outbreak of Avian Encephalomyelitis in Laying Hens in Northeastern Brazil
ABSTRACT This paper describes the epidemiological, clinical and pathological aspects of an avian encephalomyelitis (AE) outbreak in commercial laying hens in Northeastern Brazil. The disease affected 23,409 layers (from day one until 100 weeks) leading to mortality of 16.5% (5,049/30,600) of the flock. Twenty laying hens were clinically examined, and blood s
Braz. J. Poult. Sci.. Publicado em: 19/08/2019
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18. Banana leaf in the diet of laying hens in cage free system
ABSTRACT. The aim of this research was evaluate the productive performance, egg quality and the endoparasites presence on Carijó laying hens in Cage Free system, fed with two experimental diets, one of them supplemented with fresh banana leaf in natura. It were used 196 laying hens with twenty-four weeks of age, distributed in a completely randomized design
Acta Sci., Anim. Sci.. Publicado em: 04/07/2019
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19. COLORAÇÃO DE GEMA DE OVO DE POEDEIRAS COMERCIAIS RECEBENDO PIGMENTANTE COMERCIAL NA RAÇÃO
Resumo Objetivou-se avaliar a pigmentação de gemas de ovos de poedeiras alimentadas com produto comercial (PC), à base de cantaxantina e óleo de sementes de urucum. Utilizaram-se 240 poedeiras comerciais com 55 semanas de idade, que receberam cinco diferentes rações: controle (RC) à base de milho e farelo de soja, RC com dois níveis (70 e 140 ppm) do
Ciênc. anim. bras.. Publicado em: 10/06/2019
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20. Dietary Effects of Natural Polyphenol Antioxidant on Laying Performance and Egg Quality of Laying Hens Fed Diets with Oxidized Oil
ABSTRACT This study was conducted to investigate the effects of dietary oxidized oil and natural polyphenol antioxidants on laying performances and egg quality of laying hens. A total of two hundred, 61-week-old Lohmann Brown laying hens were divided into five groups, consisting in four replicates of 10 birds each. They were fed one of the five experimental
Braz. J. Poult. Sci.. Publicado em: 09/05/2019
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21. Egg quality of laying hens fed diets with plant extracts
ABSTRACT. 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
Acta Sci., Anim. Sci.. Publicado em: 29/04/2019
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22. BEAK TRIMMING BY INFRARED RADIATION OF LAYERS
ABSTRACT This study aimed at evaluating beak-trimming methods and intensities on the performance, beak length and uniformity, and egg parameters of commercial layers. During the rearing period, birds were distributed in randomized blocks, with a 2x3 factorial design + two treatments, consisting of beak trimming with infrared (IR) radiation (moderate or sever
Braz. J. Poult. Sci.. Publicado em: 18/04/2019
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23. Fiber source and xylanase on performance, egg quality, and gastrointestinal tract of laying hens
ABSTRACT The objective of this study was to ascertain the influence of different dietary fiber sources and the usage of xylanase on diet of commercial layers and their influence on productive performance, egg quality, and digestive organ biometry. A total of 864 Lohmann® White hens was fed diets with three different fiber sources (wheat bran, soybean hull,
R. Bras. Zootec.. Publicado em: 01/04/2019
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24. Mortality prediction of laying hens due to heat waves
RESUMO A mortalidade na produção de galinhas poedeiras é fato preocupante para produtores e constitui considerável perda econômica. Alguns eventos climáticos, como ondas de calor, estão diretamente relacionados ao aumento da mortalidade. O objetivo deste trabalho foi relacionar a ocorrência de ondas de calor com a mortalidade de poedeiras, consideran
Rev. Ciênc. Agron.. Publicado em: 2019-03