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Details for article 39 of 74 found articles
| Title: |
Efeitos do fracionamento do cálcio dietário e granulometria do calcário sobre o desempenho e qualidade dos ovos de poedeiras comerciais = Effects of dietary calcium fractionation and limestone particle size on performance and egg quality of commercial laying hens |
| Author: |
Diogo Tsuyoshi Ito Douglas Emygdio de Faria Elizabete Aiko Kuwano Otto Mack Junqueira Lúcio Francelino de Araujo |
| Appeared in: |
Acta scientiarum. Animal sciences |
| Paging: | Volume 28 (2006) nr. 2 pages 187-195 |
| Year: |
2006 |
| Contents: |
Avaliou-se o desempenho e a qualidade dos ovos de poedeiras submetidas ao fracionamento de cálcio (Ca) da dieta e diferentes granulometrias de calcário calcítico. Foram utilizadas 270 poedeiras ISA Babcock, com 40 semanas, por quatro períodos de 28 dias, emum delineamento inteiramente casualizado em arranjo fatorial 3x3: fracionamento do Ca – g manhã:g tarde (2:2; 1:3 e 3:1) e granulometria do calcário calcítico (mista, grossa e fina), comcinco repetições de seis aves cada. As aves alimentadas com 3 g de Ca, de manhã ou à tarde, consumiram mais ração e Ca no entanto, o consumo total diário de Ca não foi influenciado. O calcário fino influenciou negativamente a qualidade da casca. Conclui-se que o fracionamento de cálcio não influenciou os parâmetros estudados e que utilizar calcário fino prejudica a qualidade da casca dos ovos.The performance and egg quality of 270 ISA Babcock layers, aged 40 weeks, fed diets with different calcium (Ca) levels and limestone particle size were evaluated. The experimental design was randomized in a 3x3 factorial scheme: Ca fractionation – g morning : g afternoon (2:2, 1:3 and 3:1) and limestone particle size (coarse, fine and blended) totalizing nine treatments with five replications of sixhens each. Performance was not influenced by the treatments, except feed and Ca intakes. Hens fed with 3:3g Ca, in the morning or in the afternoon, had higher Ca and feed intake. However, there was no effect on daily total Ca intake. Egg specific gravity was improvedwhen hens were fed with coarse and blended limestones. Results showed that Ca fractionation did not influence performance and egg shell quality. Egg specific gravity is improved when hens are fed with coarse and blended limestones. |
| Publisher: |
Eduem - Editora da Universidade Estadual de Maringá (provided by DOAJ) |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 39 of 74 found articles
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