Desempenho de pintos de corte alimentados com rações contendo milho pré-gelatinizado
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Data
2009
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Resumo
Three experiments were carried out to evaluate the performance and nutritional value of the extruded
corn for broilers from one to 21 days of age. In the first experiment, the metabolism of pre-gelatinized corn, corn starch
and corn germ meal was assessed by the total excreta collection method from 4 to 7 days of age and values of apparent (AME)
and corrected metabolizable energy (CAME) and the results were, respectively: 3370, 3379.7, 3259.1 kcal/kg de AME and
3299.8, 3369.7, 3051.6 kcal/kg for CAME. The inclusion level of pre-gelatinized corn was evaluated in pre-starter (1 to
7 days of age – Experiment 2) and starter (8 to 21 days of age – Experiment 3) broiler rations. Broiler performance from
one to seven days of age was not affected by pre-gelatinized corn in the feed. A quadratic effect for the dry matter digestibility
coefficient (minimum point of 28.6% inclusion) and nitrogen (minimum point of 31.7% inclusion) and negative linear
negative on the ether extract digestibility coefficient. From 8 to 21 days of age, broiler performance was affected linearly
and negatively for final weight, weight gain and feed intake and quadratic for feed-to-gain ratio (maximum point of 34.3%
inclusion). For the dry matter, nitrogen and ether extract digestibility coefficients, there was a positive linear effect for
pre-gelatinized corn included in substitution of corn. Pre-gelatinized corn was a good alternative for pre-starter ration, but,
in spite of the better digestibility coefficient results, performance got worse as pre-gelatinized corn increased in diets from
8 to 21 days of age. Pre-gelatinized corn was a good alternative as energetic ingredient for first week chick feed, but, in
the starter phase it did not promote good performance despite the good digestibility indexes obtained.
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Palavras-chave
Conversão alimentar, Digestibilidade, Energia metabolizável, Ganho de peso, Valor nutricional, Digestibility, Deed-to-gain ratio, Metabolizable energy, Nutritional value, Weight gain
Citação
STRINGHINI, José Henrique; SANTOS, Denise Alencar; BRITO, Alexandre Barbosa de; NUNES, Romão da Cunha; RUFINO, Luciana Moura; SANTOS, Bruno Moreira dos. Desempenho de pintos de corte alimentados com rações contendo milho pré-gelatinizado. Revista Brasileira de Zootecnia, Viçosa, v. 38, n. 9, p. 1738-1744, 2009.