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| Registros recuperados: 72 | |
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| Ribeiro,PAP; Matos Jr,JB; Lara,LJC; Araújo,LF; Albuquerque,R; Baião,NC. |
| An experiment was carried out with 1200 23-week-old white Dekalb commercial laying hens to investigate production responses, egg quality, and energy utilization of laying hens fed different dietary energy levels at the beginning of lay. Birds were housed and divided in five groups of 240 birds according to dietary apparent metabolizable energy corrected for nitrogen (AMEn): 2700 kcal/kg; 2775 kcal/kg; 2850 kcal/kg; 2925 kcal/kg; and 3000 kcal/kg, with six replicates of 40 birds each. Birds were fed the experimental diets based on corn and soybean meal for 17 weeks. Diets were iso-nutritive, except for energy level. Increasing AMEn levels had a negative effect on egg production and egg mass (p≤0.05). AMEn levels did not influence body weight, egg weight, or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Energy conversion; Egg quality; Laying hens. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000400007 |
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| Lima,Matheus Ramalho de; Costa,Fernando Guilherme Perazzo; Givisiez,Patrícia Emília Naves; Silva,José Humberto Vilar da; Sakomura,Nilva Kazue; Lima,Denise Fontana Figueiredo. |
| The aim of this work was to evaluate the effects of the reduction on nutritional levels of diets for semi-heavy hens during the laying peak on performance, egg quality and bone parameters. A total of eight diets were evaluated, each one with five repetitions of eight birds: 1) control: formulated to supply requirements by the birds; 2) control + 0.03% or 600 FTU; 3) 15% crude protein; 2,800 kcal ME; 3.8% Ca and 0.28% aP; 4) diet 3 + 0.03% or 600 FTU; 5) 14% crude protein; 2,750 kcal ME; 3.4% Ca and 0.23% aP; 6) diet 5 + 0.03% or 600 FTU; 7) 13% crude protein; 2,700 kcal ME; 3.0% Ca and 0.18% aP; and 8) diet 7 + 600 FTU. The reduction of the nutritional levels harmed the performance of the birds, particularly egg production and egg mass, which improved by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bone health; Eggs; Laying hens; Performance. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001000016 |
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| Fascina,Vitor Barbosa; Pasquali,Guilherme Aguiar Mateus; Berto,Daniella Aparecida; Silva,Amanda da Lapa; Garcia,Edivaldo Antônio; Pezzato,Antonio Celso; Gonzales,Elisabeth; Sartori,José Roberto. |
| ABSTRACT This study was performed to evaluate the effects of the association of different digestible arginine and phytogenic additive dietary levels on performance and health status of brown-egg layers. In this study, a total of 504 33-week-old Hisex Brown layers were distributed into a completely randomized experimental design to a 4 × 3 factorial arrangement (dietary digestible arginine levels: 880, 968, 1056, or 1144 mg/kg of feed × phytogenic additive levels: 0, 100, and 200 mg/kg of feed) with six replicate cages of seven birds per cage. The phytogenic additive was composed of extracts of Baccharis dracunculifolia (40%), Astragalus membranaceus lipopolysaccharides (20%), cinnamon, and grape seed (20%). Feed intake was reduced when diets containing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aminoacids; Arg; Laying hens; Plant extract. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000600502 |
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| Kaya,Hatice; Çelebi,Şaban; Kaya,Adem; Gül,Mehmet. |
| ABSTRACT We assessed the effects of different amounts of water-treated black tea waste (BTW) in the diets of laying hens on performance, egg quality, yolk peroxidation, and blood parameters in this study. The experiment lasted for 12 weeks, during which a total of 108 Lohman layers, of 24 weeks old, were randomly allocated to one of six dietary treatments (18 hens each); each treatment consisted of six replicate cages, each containing three hens. Experimental animals were fed a commercial diet that contained 0 (control), 20, 40, 60, 80, and 100% BTW in place of wheat bran. Providing BTW in diets for laying hens, instead of wheat bran, did not have a significant effect on egg production, egg weight, or body weight change. As the amount of BTW in the diet... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant; Egg quality; Laying hens; Performance. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100545 |
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| Pereira,Dayana Cristina de Oliveira; Miranda,Késia Oliveira da Silva; Demattê Filho,Luiz Carlos; Pereira,Gustavo do Valle; Piedade,Sonia Maria De Stefano; Berno,Patricia Rodrigues. |
| ABSTRACT The objective of this study was to evaluate the effect of the presence of roosters on welfare and egg production of laying hens reared in an alternative system. Two breeding systems were established: barn 1 - laying hens reared without roosters (4500 birds); and barn 2 - laying hens reared with roosters (4500 layers and 250 roosters). In the poultry facilities, microclimate, egg production, mortality rate, and bird behavior were evaluated. Microclimate analysis showed that the birds were subjected to periods of constant heat stress, except for the morning hours. However, even under these conditions, egg production results and mortality rate were consistent with the indices recommended in the Isa Brown management guide in the barn with roosters;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Behavior; Enthalpy; Husbandry environment; Laying hens. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000300175 |
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| GUARNIERI, P. C.; PAGNUSSATT, H.; ANIECEVSKI, E.; DAL SANTO, A.; LEITE, F.; VALENTINI, F. D. A.; FACCHI, C. S.; ZACCARON, G.; BOSETTI, G. E.; ROSSATTO, G.; BOIAGO, M. M.; TAVERNARI, F. de C.; ARTONI, S. M. B.; PETROLLI, T. G.. |
| Abstract: The purpose of this study was to evaluate infrared beak trimming versus hot-blade beak trimming on performance, organ and bone development of laying pullets, using 240 birds, at 0-16 weeks of age, from two strains (white layer - Hy-Line W36 and brown layer - Hy-Line Brown). Infrared debeaking was performed on the first day of life in the hatchery, whereas hot-blade beak trimming was performed at eight days of age. Zootechnical performance at 6, 9, 12 and 15 weeks of age was analyzed. At the end of the trial, one Bird per experimental unit was euthanized for liver, gizzard, proventriculus, heart and small intestine relative weight evaluation. Both tibiotarsus were collected to measure bone breaking resistance, bone mineral content and bone... |
| Tipo: Artigo de periódico |
Palavras-chave: Bem-estar animal; Densitometria; Debeaking; Avicultura; Poedeira Comercial; Debicagem; Animal welfare; Densitometry; Poultry; Laying hens. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1126722 |
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| MIGLIORINI, M. J.; BOIAGO, M. M.; STEFANI, L. M.; ZAMPAR, A.; ROZA, L. F.; BARRETA, M.; ARNO, A.; ROBAZZA, W. da S.; GIURIATTI, J.; GALVÃO, A. C.; BOSCATTO, C.; PAIANO, D.; SILVA, A. S. da; TAVERNARI, F. de C.. |
| Tipo: Artigo de periódico |
Palavras-chave: Qualidade do ovo; Herbal extract; Vida útil; Validade; Nutrição Animal; Poedeira Comercial; Dieta; Óleo Essencial; Orégano; Controle Térmico; Stress; Gema de Ovo; Animal nutrition; Laying hens; Egg quality; Egg yolk; Origanum vulgare; Shelf life; Thermal stress. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112622 |
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| SILVA, M. C. da; COSTA, I. C.; NAKAZATO, G.; PINHEIRO, J. W.; LEDUR, M. C.; LOYOLA, W.; VENANCIO, E. J.. |
| Abstract: The objective of this study was to compare the antimicrobial activity of macrophages and serum in laying hen (MM, CC, and CCc) and broiler chicken lineages (TT and LL). Macrophages were evaluated for phagocytic and antimicrobial activity. Microbicidal serum activity was evaluated by the resistance test for serum and the agar test. The results showed that phagocytic activity was higher in males of the MM strain, with 13% of macrophages presenting phagocytosis, while the other lineages studied, and even female MM, presented a rate of 6% of phagocytic cells. However, antimicrobial activity in macrophages from males of CCc lineage and females of TT lineage were higher, eliminating more than 30% of the Salmonella enterica inoculum, while in the other... |
| Tipo: Artigo de periódico |
Palavras-chave: Imunidade natural; Complement system; Fowls; Genetic selection; Natural immunity; Frango de Corte; Poedeira Comercial; Galinha Para Postura; Ave Domestica; Genética Animal; Seleção Genética; Broiler chickens; Laying hens. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1136555 |
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| Registros recuperados: 72 | |
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