ABSTRACT. The nutritional value of Xaraes and Piata palisadegrass silages wilted or with additives was evaluated in a completely randomized design (2x4 factorial arrangement), being two cultivars of Brachiaria brizantha (Xaraes and Piata palisadegrass) and four ensiling methods as treatments: T 1 -control, in natura forage (INF); T 2 -INF wilted for 4 hours under the sun; T 3 -INF + bacterial additive (BactoSilo® Lallemand) 2 g ton -1of in natura forage; T 4 -INF + 15% of pearl millet meal. For ensiling, the grasses were harvested in the growth stage of 40 days, at 20 cm from the ground level. The addition of the inoculant and millet meal improved the fermentative and chemical parameters of both cultivars silages, by increasing soluble carbohydrates (SC), CP and TDN contents and reducing ammonia-nitrogen and pH. Because of its composition, 15% of millet meal inclusion affected SC, NDF, ADF and increased the IVDDM of silages. Bacterial inoculant or millet meal inclusion enhanced the nutritional value of Brachiaria brizantha silages and, could have a positive performance response on ruminants fed with these silages. Wilting was also effective in improving the fermentative stability of grass silages and may be a cheaper alternative to additives.Keywords: Brachiaria brizantha, millet meal, bacterial inoculant.Valor nutricional das silagens de capins Xaraes e Piatã emurchecidas ou acrescidas de aditivos RESUMO. O valor nutricional de silagens pré-secadas ou aditivadas dos capins Xarães e Piatã foi avaliado em delineamento experimental inteiramente casualizado (esquema fatorial 2x4), sendo duas cultivares de Brachiaria brizantha (Xarães e Piatã) e quatro métodos de ensilagem: T 1 -controle, forragem in natura (FIN); T 2 -FIN pré-secada ao sol por 4 horas; T 3 -FIN + aditivo bacteriano (BactoSilo® Lallemand) 2 g t -1 FIN; T 4 -FIN + 15% de farelo de milheto. Para a ensilagem, os capins foram colhidos no estágio de crescimento de 40 dias, a 20 cm do nível do solo. A adição do inoculante e farelo de milheto melhoraram os parâmetros fermentativos e bromatológicos das silagens, elevando os teores de carboidratos solúveis (CHOS), PB, NDT e reduzindo o nitrogênio amoniacal e pH. Devido a sua composição, a adição de 15% de farelo de milheto, afetou os CHOS, FDN, FDA e incrementou a DIVMS nas silagens. A adição de inoculantes bacterianos ou farelo de milheto melhorou o valor nutricional das silagens de Brachiaria brizantha e, poderiam ter resposta positiva no desempenho de ruminantes alimentados com estas silagens. O pré-emurchecimento foi efetivo no incremento da estabilidade fermentativa de silagens de capim e, pode ser uma alternativa mais econômica aos aditivos.Palavras-chave: Brachiaria brizantha, farelo de milheto, inoculante bacteriano.
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