Aerobic stability, chemical composition and ruminal degradability of sugarcane silage with glycerin from biodiesel

Abstract

The experiment was performed with the objective of studying the ensiled sugarcane silage with 0, 5, 10, 15 and 20% of glycerin in experimental PVC silos. The aerobic stability was assessed by measuring the pH and the temperature of the silage at 0, 24, 48, 72, 96 and 120h. The chemical composition, the levels of non-fiber carbohydrates (NFC) and the total digestible nutrients (TDN) were evaluated. The in vitro digestibility of dry matter (IVDDM) and the in vitro digestibility of the cell wall (IVDCW) in the silages were evaluated. In three fistulated cattle the in situ degradability of dry matter (DM) and the disappearance percentage of the neutral detergent fiber (NDF) in samples incubated at 0, 2, 6, 12, 24, 48, 72 and 96h were analyzed. The experimental design was completely randomized and the statistical analyzes were done using Bayesian inference. Increases were observed in DM, TDN, mineral matter, NFC and reductions in NDF, acid detergent fiber, crude protein and ether extract as the inclusion of glycerin was higher. IVDDM increased (P <0.05) in silage with 15 and 20% of glycerin in relation to those with 0, 5 and 10%. The IVDCW at levels of 10, 15 and 20% of glycerin was higher (P <0.05) compared to the other treatments. Increases were observed in the soluble portion (a), a reduction in the insoluble fraction (b), and an increase in the degradability fraction constant (c) of the silages with 5, 10, 15 and 20% of glycerin (P <0.05) compared to the control. Glycerin improved aerobic stability while maintaining a low pH and temperature during the observation period at levels of 15 and 20% of glycerin against the silage with 0, 5 and 10%. These results indicate glycerin as a promising additive for sugarcane silage, being able to enhance energy density and improve the aerobic stability of the ensiled matter when its inclusion is from 10 to 20%. Key words: Energy, glycerol, in vitro digestibility, non-fibrous carbohydrates, silage pH, temperature of silage ResumoObjetivou-se estudar a silagem de cana-de-açúcar ensilada com 0, 5, 10, 15 e 20% de glicerina em silos experimentais de PVC. Avaliou-se a estabilidade aeróbia medindo-se o pH e a temperatura da massa ensilada em 0, 24, 48, 72, 96 e 120h. Avaliaram-se a composição química, os teores de carboidratos não fibrosos (CNF) e nutrientes digestíveis totais (NDT). Avaliaram-se a digestibilidade in vitro da matéria seca (DIVMS) e da parede celular (DIVPC) das silagens. Em três bovinos fistulados avaliou-se a degradabilidade in situ da matéria seca (MS) e a porcentagem de desaparecimento da fibra em detergente neutro (FDN) em amostras incubadas em 0, 2, 6, 12, 24, 48, 72 e 96h. O delineamento experimental foi inteiramente casualisado e as análises estatísticas realizadas por meio de Inferência Bayesiana. Observaram-se aumentos na MS, NDT, matéria mineral, CNF e a redução de FDN, fibra em detergente ácido, proteína bruta e extrato etéreo à medida que a inclusão da glicerina foi maior. Houve aumento na DIVMS nas silagens com 15 e 20% de glicerina em relação à...

The use of crude glycerin as an alternative to reduce fermentation losses and enhance the nutritional value of Piatã grass silage

“…Similar results were reported by Gomes et al (2015), who observed a reduction by 37.56% in the CP concentration of sugarcane silages added with 150 g kg −1 of fresh matter glycerin compared with control silages. This is often reported because additives used to promote fermentation are rich in energy and present low protein content.…”

Feeding behavior of sheep fed sugarcane silage enriched with detoxified castor bean meal

“…The castor bean meal was purchased from agribusiness in the metropolitan region of Salvador-BA, which was previously detoxified using lime solution Ca(OH) 2 . Each kg was diluted in 10 liters of water and applied in the amount of 60 grams of lime per kg of meal at natural matter basis, as recommended by Oliveira et al (2015). After mixing the meal with the lime solution, the material stayed still for twelve hours (overnight).…”

“…Daniel et al (2013) found that sugarcane silages can contain up to 22% volatile compounds, with ethanol representing most of it. From de ensiling process, there is roughage rich in neutral detergent insoluble fiber (77%) and with a low crude protein content (4%) (Gomes et al, 2015).…”

“…Castor bean meal is a by-product originated from the extraction of castor bean oil, which is toxic in natura, but when treated with calcium hydroxide loses its toxicity (Oliveira et al, 2010) and can be used in animal nutrition. The detoxified castor bean meal presents 91.5 ± 0.3% dry matter, 11.1 ± 4.2% mineral matter, 35.2 ± 5.0% crude protein, 34.9 ± 7.0% neutral detergent insoluble fiber and 34.6 ± 7.9% acid detergent insoluble fiber (Oliveira et al, 2015;Ribeiro et al, 2014).…”

Fermentative profile and nutritional value of elephant grass silage with different levels of crude glycerin

“…These limitations can be minimized with additives aimed at improving the fermentation profile and minimizing dry matter losses through effluents and gases. Among the potential additives, crude glycerin has a high dry matter content (90%) and a high glycerol content (80%), which can be a source of energy for fermentative bacteria, and it is also highly available due to the recent increase in biodiesel production that has caused the prices of this industrial by-product to decrease, making its use attractive (DIAS et al, 2014;GOMES et al, 2015;RIGUEIRA et al, 2017).…”