<b>Nutritional value of Xaraes and Piata palisadegrass silages prepared with additives or wilting</b>

Abstract

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.

Nutritional value and physical and chemical characteristics of white mulberry tree using different conservation methods for ruminant feed

“…Fresh mulberry silage did not differ significantly from the other silages in terms of EC values (1079.08 mS cm -1 ). Higher values of EC were observed in legume silage due to higher concentration of soluble components and ions compared to grass silage (BAMBIERIS JUNIOR et al, 2010;LIMA-OROZCO et al, 2013), which provides an explanation for the highest EC values in pre-wilted mulberry and fresh mulberry silages. In general, wilted silage resulted in higher cell lysis than non-wilted silage, resulting in higher EC (LOURES et al, 2005).…”

“…The total loss in the ensiling process can be up to 20% of the ensiled mass (McDONALD et al, 1991) and, of that total, about 6.1% to 24.6% loss occurs during the fermentation (ZOPOLLATTO et al, 2009). In order to improve the fermentation pattern of silage, techniques such as wilting and the use of additives have been used to increase the DM content of the material before ensiling and to promote a more pronounced drop in pH, respectively (AZEVEDO et al, 2015).…”

Valor bromatológico e fermentativo da silagem de capim piatã

“…For the treatment with cornmeal, the NDF values were reduced, since this additive is poor in fiber. Reduction in the fiber values were found by Azevedo et al (2014), in silage of Piatã grass, which showed 691.7 g kg -1 and 661 g kg -1 of NDF in the treatments with enzyme-microbial inoculant and with inclusion of millet meal, respectively, as compared with the control treatment (727.5 g kg -1 ).…”

“…The use of additives that contribute to the increase in dry matter content in grass silage is commonly used because of the low DM content in the development phase with better nutritional value (Azevedo et al, 2014;Epifanio et al, 2014;Silva et al, 2011). Therefore, the use of cornmeal is always the best option as an additive as well as other available meal.…”

“…Forage production is dependent on seasonal climatic factors and thus varies between high in the rainy season, and low in the dry season under tropical conditions. In this sense, forage conservation is an essential management practice to ensure good-quality food in the periods of forage scarcity to meet the animal requirements throughout the entire year (Azevedo et al, 2014) and increase the use efficiency the pasture on the period of greater production.…”