Perfil fermentativo de silagens de cana-de-açúcar in natura ou queimada e tratadas ou não com Lactobacillus buchneri

Abstract

IntroduçãoEm confinamentos, a cana-de-açúcar é um dos volumosos mais utilizados na alimentação de ruminantes, devido à alta produtividade de energia por área. Todavia, o risco de incêndios acidentais pode comprometer o uso da cana-de-açúcar fresca. Neste caso, a ensilagem poderia ser utilizada não somente como prevenção, mas também como solução. Em estudo pioneiro sobre os efeitos do fogo na ensilagem da cana-de-açúcar, Bernardes et al. (2007) constataram que silagens de cana-de-açúcar queimada apresentam maiores concentrações de etanol (7,3 versus R. Bras.

Impact of days post-burning and lime as an additive to reduce fermentative losses of burned sugarcane silages

“…The negative effect of lignin on digestibility has been previously documented (Jung and Allen, 1995). However, all silages had low digestibility (435-490 g/kg of organic matter), and our data are in accordance with previous studies (Roth et al, 2010;Siqueira et al, 2011b), which also reported a low digestibility of burned sugarcane silages.…”

Nutritive value of sugarcane silages with different bacterial additives and fermentation periods

“…Anim., Salvador, v.21, 01 -13, e210212020, 2020 ISSN 1519 9940 http://dx.doi.org/10.1590/S1519-9940210212020 Balieiro et al (2009). Siqueira et al (2011) found values of 24.8 % and 25.9 % DM for silage containing L. buchneri and silages without inoculants, respectively. There was no significant difference (P > 0.05) for crude protein contents.…”

“…Therefore, a silage pH below 4.2 may have inhibited bacterial growth and propionic acid production (Michel et al, 2017). Siqueira et al (2011) evaluated fresh sugarcane silage (without burning) and burned with calcium oxide (CaO) and / or L. buchneri, and observed an NDF content of 75.9 % for sugarcane silage with added L. buchneri at 60 days of fermentation, which was higher than the content of the material before ensiling. This anomaly was also observed in the present study, where sugarcane had a lower NDF content before ensiling (Table 1).…”

“…The high levels of lignin observed in this study were due to the accumulation of dead material that the sugarcane presented at the time of ensiling, since no shredding was performed. Siqueira et al (2011) evaluated fresh and burnt sugarcane silage and observed a 28% reduction in lignin content for burnt sugarcane before ensiling, since bagasse is a fraction with high concentrations of NDF, ADF and lignin. At 10 days of fermentation, silages inoculated with P. acidipropionici bacteria presented higher water soluble fractions (Table 5), with 27.50 %, which was 34.18 % and 35.65 % higher than silage without additives and with L. buchneri.…”