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| Saki,AA; Rahmati,MMH; Eskandarlou,A; Zamani,P; Hosseini Siyar,SA. |
| In this study, the effects of the inclusion of different vitamin C levels in the diet on bone mineral density (BMD) and eggshell quality was determined. Four experimental diets with four levels of vitamin C (0, 250, 500 and 750 mg/kg) were used. During the experiment, environmental temperature and humidity were 19±1°C and 55±5% respectively. Correlation coefficients of BMD index and shell characteristics with production parameters were also determined. Egg weight, egg mass, hen-day egg production and eggshell quality were not significantly influenced by vitamin C levels. BMD was not affected by vitamin C utilization. A positive correlation was observed between BMD and egg weight and hen-day egg production. A significant positive correlation between... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bone mineralization; Egg quality; Layer hen; Vitamin C. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000300007 |
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| Saki, Ali Asghar; Atrian, Alireza; Goudarzi, Sara Mirzaie; Khodakaramian, Gholam; Yousefi, Azam. |
| The effect of diets containing wheat and rice brans with or without phytase supplementation on performance, intestinal carbohydrase activities and mRNA expression of sodium-glucose transporter-1 (SGLT-1) in layers was studied. A total of 96 23-wk-old Hy-line W-36 were allocated in a completely randomized experimental design at random with 6 treatments and 4 replicate cages of 4 birds each. A control diet was used in this experiment and then it was formulated to contain 10% wheat bran and 15% rice bran. Then phytase (2 g kg-1; 1000 FTU kg-1) was added to each diet. Feed intake, egg mass, feed conversion ratio, shell weight, shell thickness and Haugh units were not influenced by brans or phytase supplementation (p > 0.05). But egg production decreased in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bran; Intestinal enzyme activity; Layer hen; Performance.. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/31900 |
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| Rezende,Leandro do Carmo; Cunha,Lucas Maciel; Teixeira,Cristina Mara; Oliveira,Paulo Roberto de; Martins,Nelson Rodrigo da Silva. |
| The poultry industry is characterized for its constant search for productivity and profitability, which are based on flock health status. Brazilian Commercial laying hens (Gallus gallus domesticus) have been impacted significantly by mite infestations. This review aims to compile the literature on the occurrence, economic losses, biology, epidemiology and control of mite species considered important for the Brazilian laying poultry industry. The national experience was compared with practices of other countries and a scarcity of studies on this subject in Brazil was evident. The poultry industry has prioritized the use of pesticides to control infestations with little regard for the adverse effects. In this context, the integrated control programs using... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Layer hen; Mite; Dermanyssus; Megninia; Ornithonyssus. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000700014 |
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