| Autor: |
Rivera, Diego Fernando Remolina, Bertechini, Antonio Gilberto, Oliveira, Tiago Ferreira Birro, Castro, Solange de Faria, Oliveira, Henrique Braga, Bobadilla-Mendez, Manuel Fernando |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Ciência e Agrotecnologia, Volume: 38, Issue: 6, Pages: 573-580, Published: DEC 2014 |
| Popis: |
The effect of cholecalciferol (D3) and 25-hydroxycholecalciferol (25-OHD3) as isolated or associated sources of vitamin D (100%-0%, 75%-25%, 50%-50%, 25%-75%, 0%-100%) on the productive performance, egg quality, and bone characteristics was evaluated in white egg-laying hens fed two levels of calcium (Ca) and phosphorus (P) in the basal diet (BD) (BD1 = 0.38% Ca - 0.36% available P and BD2 = 3.2% Ca - 0.30% available P). Nine hundred and sixty Dekalb White hens (24 weeks old) were distributed into 80 cages, under a completely randomized factorial design for 16 weeks. The use of associated sources of vitamin D reduced the feed intake and feed conversion ratio, as well as BD1, which also increased the egg production and egg mass. The association of vitamin D sources with up to 50% 25-OHD3 increased the eggshell percentage. There was interaction (p |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
