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Revista Brasileira de Zootecnia

versão On-line ISSN 1806-9290

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PEDROSO, André de Faria; RODRIGUES, Armando de Andrade; BARIONI JUNIOR, Waldomiro  e  SOUZA, Gilberto Batista de. Fermentation parameters, quality and losses in sugarcane silages treated with chemical additives and a bacterial inoculant. R. Bras. Zootec. [online]. 2011, vol.40, n.11, pp.2318-2322. ISSN 1806-9290.  http://dx.doi.org/10.1590/S1516-35982011001100006.

The objective of this trial was to evaluate chemical additives and a bacterial inoculant on the inhibition of alcoholic fermentation and reduction of losses in sugarcane silages. Treatments were (doses on a fresh forage basis): without additive (control); urea (10 g/kg); urea (5 g/kg) + sodium benzoate (0.5 g/kg); sodium benzoate (1 g/kg); urea + ammonium sulfate in a 9:1 relation (10 g/kg); Lactobacillus buchneri (5 × 104 cfu/g). Silages were produced in 10.16- × 30-cm PVC tubes, provided with tight lids adapted with Bunsen valves for gas losses quantification. Minisilos were opened 139 days after ensiling. Ethanol content (227 g/kg dry matter - DM) and total DM loss (30%) were high in the control silage. All additives, except benzoate, decreased ethanol concentration in silages. Inoculation with L. buchneri increased acetic acid content in the silage, resulting in a 41% reduction in ethanol content and the lowest gas loss among treatments (15.2%). There was synergistic effect between additives for the combined use of urea and benzoate. Silage treated with urea + ammonium sulfate has higher content of total digestible nutrients than the silage treated with urea exclusively.

Palavras-chave : ammonium sulfate; ethanol; L. buchneri; sodium benzoate; urea; volatile fatty acids.

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