Glucomanano esterificado em rações de frangos de corte alimentados com milho contaminado por fumonisinas
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Data
2012-01-24
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Universidade Federal de Goiás
Resumo
An experiment with 420 broiler chicks, male Cobb 500, with average weight of
44.6 g ± 0.5 g, was conducted to evaluate corn contaminated with fumonisins in
diets containing or not mycotoxin absorbent based on sterified glucomannan
(GME) at 0 and 0.1% diet concentration. Chicks were allotted in a completely
randomized design and factorial arrangement 3 x 2 + 1 (time of exposition to
contaminated corn seven, 21 and 35 days), adsorbent addition (0 and 0.1% in
the diet) and control diet (corn non-contaminated with fumonisins) totalizing seven
treatments with five replicates of 12 birds each. The diets formulated were prestarter,
starter and growth containing contaminated corn by fumonisins with GME.
Diets were based on corn and soybean meal to attend nutritional requirements
proposed by Brazilian Tables. Variables evaluated were: weight gain, feed intake,
feed conversion and livability at seven, 14, 21, 28 and 35 days of age.
Metabolizability coefficient of dry matter, ether extract and protein in three
metabolic assays were carried out from four to seven days, 18 to 21 days and 36
to 39 days of age. We also evaluated relative weight and length digestive organs,
villous height and crypt depth of small intestine at seven, 21 and 35 days of age.
Statistical analysis were performed with R software and average compared by
Tukey test (5%). Supplementation of 0.1% of mycotoxin absorbant based on GME
containing corn contaminated with fumonisins showed no positive affects on
performance, but was able to maintain the coefficient of ether extract
metabolizability in broilers. For the relative weight and length digestive organs was
found that the duration of exposure to corn contaminated with fumonisin caused a
reduction in the length of the large intestine and the presence of the additive
showed no reduction on effects of fumonisins. Other organs of the digestive
system weren´t affected by treatments. There was no significant interaction
(p>0.05) between fumonisin and GME for villous height, crypt depth and relation
villous:crypt in the duodenum, jejunum and ileum to seven days of age. On day 21,
birds fed contaminated corn with fumonisins with or without the GME had lower
villous height of duodenum, jejunum and ileum, and lower crypt depth in the
duodenum, ileum and lower relation villous:crypt in the ileum compared to the
birds that fed non-contaminated corn with fumonisins (p<0.05). At 35 days it was
found that the presence fumonisin affect the intestine and the addition of GME can
collaborate to reduce inflammatory reaction and express benefic effect the
intestine.
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Palavras-chave
adsorvente , avicultura , grãos , micotoxinas , nutrição , absorbant , poultry , grains , mycotoxins , nutrition
Citação
OLIVEIRA, Eduardo Miranda de. Sterified glucomanann in broiler diets fed corn contaminated witg fumonisis. 2012. 60 f. Dissertação (Mestrado em Ciências Agrárias - Veterinaria) - Universidade Federal de Goiás, Goiania, 2012.