English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Com o objetivo de determinar as exigências nutricionais de zinco para frangos de corte machos e fêmeas na fase inicial (8 a 21 dias), foram utilizadas 384 aves, metade fêmea e metade macho para cada experimento. Foi formulada uma dieta basal atendendo às exigências nutricionais das aves, com exceção do nível de Zn, que permaneceu deficiente no nível de 12 ppm. Os tratamentos consistiram da suplementação de Zn à dieta basal com óxido de zinco nos níveis de 12,0; 37,0; 62,0; 87,0; 112,0 e 137,0 ppm de Zn. As características avaliadas foram: ganho de peso, consumo de ração, conversão alimentar e concentração de Zn no osso, no fígado e no soro. Não houve efeito dos níveis de Zn sobre as características de desempenho e a concentração de Zn no fígado das aves. Houve efeito dos níveis de Zn sobre as concentrações de Zn no soro e no osso. Verificou-se interação entre níveis de zinco e sexo somente para concentração de Zn no osso. As exigências estimadas foram de 86,12 ppm para frangos de corte machos e de 85,70 ppm para fêmeas. Para a concentração de Zn no soro, a exigência estimada foi de 113,55 ppm, entretanto, considerando a importância desse mineral no desenvolvimento ósseo, a exigência de Zn é de 86,12 ppm para frangos de corte machos e de 85,70 ppm para fêmeas de 8 a 21 dias de idade. Three hundred and eighty four broilers chicks, half males and half females, were used to determine the zinc requirement for broilers in the initial phase (from 8 to 21 days). A basal diet was formulated that meet the nutritional requirements, except for Zn level, which was kept deficient at 12.00 ppm. The treatments consisted of Zn supplementation to the basal diet with Zn oxide, in the levels of 12.0, 37.0, 62.0, 87.0, 112.0 and 137.0 ppm of Zn. The characteristics evaluated were weight gain, feed intake, feed:gain ratio and Zn concentration in the bone, liver and blood serum. There was no effect of Zn levels on performance characteristics and on Zn concentration in liver of birds. There was effect of Zn levels on Zn concentration in serum and bone. Significant interaction between Zn levels and sex was observed only for Zn concentration in bone. The requirement estimations were 86.12 ppm and 85.70 ppm for broilers males and females, respectively, from 8 to 21 days of age. Based on the Zn concentration in the serum, requirement estimated was of 113.55 ppm, however, considering the importance of this mineral in the bone development, requirement of Zn is of 86.12 ppm and 85.70 ppm for male and female broilers from 8 to 21 days of age

Exigências nutricionais de zinco para frangos de corte machos e fêmeas na fase inicial