Ensiling characteristics, structural and nonstructural carbohydrate composition and enzymatic digestibility of Napier grass ensiled with additives

Abstract

Ensiling characteristics, structural and nonstructural carbohydrate composition and enzymatic digestibility (ED) of Napier grass silage was examined. Napier grass ensiled with no additive control, 0.2% formic acid, 0.4% molasses, and 0.3% fibrolytic enzyme for, 7, 30, 60 and 90days. Additives increased lactic acid, soluble carbohydrate and decreased all of lignocellulosic contents except acid detergent lignin and pH than control. The highest value of nonstructural carbohydrate and large reduction in lignocellulosic contents was observed in formic acid and fibrolytic enzyme silage respectively. The content of glucose and fructose showed rapid drop in the first 7days of ensilage. Ensilage decreased lignocellulosic contents and increased ED compared to fresh material. The ED of formic acid and molasses silage was significantly higher than control and fibrolytic enzyme silages in all tested days. In summery the ensiling quality structural and nonstructural carbohydrate and ED value of mature Napier grass silage improved through additives.

Microbial inoculant and an extract of <i>Trichoderma longibrachiatum</i> with xylanase activity effect on chemical composition, fermentative profile and aerobic stability of guinea grass (<i>Pancium maximum</i> Jacq.) silage

“…For instance, xylanase catalyzes the hydrolysis of xylanes, increasing fibre solubility of forages (Sunna and Antranikian, 1997;Polizeli et al, 2005). Desta et al (2016) observed a decrease of NDF content of grass ensiled with fibrolytic enzyme product, and this was also confirmed in our study. In addition, Sheperd and Kung (1996) showed that enzyme treatment of maize silage reduced NDF content and improved in vitro NDF digestion.…”

“…Desta et al (2016) observed a dramatic increase (> 3 folds) of lactic acid concentration at day 7, 30, 60 or 90 after ensiling grass silage containing an exogenous fibrolytic enzyme. Desta et al (2016) also reported lower silage pH at day 30, 60 or 90 after ensiling with enzyme treatment in comparison to control one.…”

“…Fibrolytic enzyme products can increase cell wall degradation and availability of water-soluble carbohydrate for LAB fermentation, leading to a more rapid drop of pH, especially in forages with a high content of structural carbohydrates (Dehghani et al, 2012;Sun et al, 2012). Desta et al (2016) observed a dramatic increase (> 3 folds) of lactic acid concentration at day 7, 30, 60 or 90 after ensiling grass silage containing an exogenous fibrolytic enzyme. Desta et al (2016) also reported lower silage pH at day 30, 60 or 90 after ensiling with enzyme treatment in comparison to control one.…”

Fermentation quality and aerobic stability of mulberry silage prepared with lactic acid bacteria and propionic acid

“…Except LAB inoculants, the inhibitor additives, such as formic acid, acetic acid, or propionic acid, were attributed as carboxylic acid could reduce the pH by direct acidifying the silage medium (Desta, Yuan, Li, & Shao, 2016). And the propionic acid has the antimicrobial properties, which would lead to fermentation inhibition (Huhtanen, Jaakkola, & Nousiainen, 2013).…”

An improved procedure to assess the organic biodegradability and the biomethane potential of organic wastes for anaerobic digestion

“…This may be explained by the hydrolysis of complex carbohydrates/proteins and their subsequent accumulation in the form VFA after lactic fermentation. These are well documented phenomena in good quality silages (at low pH conditions) (Desta et al, 2016;McDonald et al, 1991;Menardo et al, 2015;Pakarinen et al, 2011;Teixeira Franco et al, 2017a). On the other hand, while testing cattle manure it is difficult to distinguish a specific impact of confined storage on the phase distribution of BMP.…”