Influence of increased doses of detoxified castor bean meal on chemical composition and characteristics of sugarcane silage

Abstract

Sugarcane (Saccharum officinarum L.) ensilage presents serious limitations due to the conversion of soluble carbohydrates into ethanol, thus, it is necessary to use additives that reduce losses of DM during the ensilage process. The aim of this study was to evaluate the effect of increasing levels of detoxified castor-bean (Ricinus communis L.) meal (DCBM) on the nutritive value, fermentation pattern, stability and losses of sugarcane silages. Twenty mini-silos with sugarcane and five different concentrations of DCBM (0, 50, 100, 150 and 200 g kg -1 fresh matter) were prepared in a completely randomized design with five replicates per treatment. After 60 d, silage was sampled to determine chemical-bromatological composition, fractionation of carbohydrates and protein content, ammoniacal N (N-NH3) and losses through gases and effluents. The addition of DCBM increased (P < 0.05) DM content, crude protein, fraction A + B1 of the total carbohydrates. However, it reduced (P < 0.05) the levels of neutral and acid detergent insoluble fiber, fraction B1 + B2 of total N and N-NH3. The addition of DCBM reduced the losses of total DM but decreased silages aerobic stability. The addition of 150 g kg -1 DBCM improved the nutritional value, fermentation pattern and reduced losses of sugarcane silages.

Fermentative profile and nutritional composition of sugarcane silages associated with different levels of moringa hay

“…Under anaerobic conditions in yeast, pyruvate is decarboxylated to form CO 2 and acetaldehyde, which is then reduced by NADH to generate NAD + and ethanol; this process is known as alcoholic fermentation (Walker & Stewart, 2016). In sugarcane silage, CO 2 production during alcoholic fermentation is quite significant and gas losses are highly correlated with yeast ethanol production (Paulino et al., 2018). Thus, reduction in ethanol production should be the focus of sugarcane silage.…”

The inclusion of detoxified castor bean meal in sugarcane silage increases the carcass weight and the content of unsaturated fatty acids in lamb meat

“…The linear increase observed for the intake of NFC was mainly due to the inclusion of grain corn in the total diet of the animals. In addition, the addition of DCBM to sugarcane silage increases the levels of residual NFC in the silage (Paulino et al, 2018). It is possible that the observed increase in the intake of NFC-with the increases in the intake of NDF-has provided a linear increase in the intake of TDN in sheep.…”

“…The initial increase in NFC digestibility may be due to an increase in the content of residual soluble carbohydrates in the silage, mainly A + B1 fraction, with the inclusion of DCBM (Paulino et al, 2018). The decrease observed from the 149 g/kg level can be attributed to the greater participation of corn starch in the NFC fraction of the animals' diet.…”

“…The initial increase in NFC digestibility may be due to an increase in the content of residual soluble carbohydrates in the silage, mainly A + B1 fraction, with the inclusion of DCBM (Paulino et al, 2018).…”

“…However, due to its toxic nature, castor bean meal must undergo detoxification before being offered to animals (Borja et al, 2017; Palmiri et al, 2016). Studies evaluating the use of detoxified castor bean as an additive in sugarcane silage have reported increases in the levels of protein and total digestible nutrients (TDN) and a reduction in ethanol production and DM losses (Oliveira et al, 2015; Paulino et al, 2018). However, few studies have been conducted to evaluate the performance of animals fed sugarcane silages added with agribusiness by‐product, especially with detoxified castor bean meal (DCBM).…”