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vol.31 número6Desempenho, rendimento de carcaça e excreção de cálcio de frangos de corte alimentados com diferentes níveis de aminoácidos e cálcio no período de 22 a 42 dias de idadeInfluência do estádio de maturação na colheita e temperatura de secagem de grãos de trigo sobre os valores de energia metabolizável aparente corrigida (EMAc) em frangos de corte índice de autoresíndice de assuntospesquisa de artigos
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Revista Brasileira de Zootecnia

versão impressa ISSN 1516-3598versão On-line ISSN 1806-9290

Resumo

MAZZUCO, Helenice et al. Chemical and energy composition of corn harvested with various moisture levels and different drying temperatures to broiler chickens . R. Bras. Zootec. [online]. 2002, vol.31, n.6, pp.2216-2220. ISSN 1806-9290.  https://doi.org/10.1590/S1516-35982002000900009.

The experiment was conducted to evaluate the effects of moisture levels at harvest and drying temperatures of corn on its chemical composition and apparent metabolizable energy corrected to zero nitrogen retention (AMEn) to broiler chickens. The corn was harvested with 35%, 25%, 18%, 15.3% and 14.3% of moisture and submitted to drying temperatures of 100, 70 and 40 ºC. The moisture levels of 15.3% and 14.3% of corn were not submitted to drying and the last value represented the treatment post-harvesting (60 days after the first harvest). The chemical composition was determined by AOAC (1995) and AMEn assay was carried out by total collection procedure as described by Hill and Anderson (1958) and methodology of Matterson et al. (1965). When the AMEn values were considered on as fed basis, significant differences occured between the treatment of corn no drying and the others. The mean AMEn value was 11.8% less in energy (2864kcal/kg) relative to the highest value (3247kcal/kg).This is due to grain humidity having reached 24% on that treatment caused by natural grain natural re-hydration. When the energy values of corn were changed to dry-matter basis, there were no differences among the treatments. There were no major changes in nutritive value of corn harvested with different moisture levels and submitted to various drying temperatures, compared to expected standards, except the AMEn value (as fed basis) when the corn was no drying.

Palavras-chave : AMEn; broiler chickens; chemical composition; corn; drying temperatures; moisture.

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