Effects of a fibrolytic enzyme and bacterial inoculants on the fermentation, chemical composition and aerobic stability of ensiled potato hash

Abstract

The study was conducted to evaluate the effects of adding a fibrolytic enzyme in combination with bacterial inoculants on the fermentation, chemical composition and aerobic stability of ensiled potato hash (PH). Potato hash silage (PHS) was produced by mixing 800 g PH/kg and 200g wheat bran (WB)/kg. The mixture was ensiled with either no additive or enzyme Celluclast (low or high dose) or bacterial inoculants (Emsilage and Silosolve). These treatment combinations were produced: i) no additive (control); ii) Celluclast low dose (CLD); iii) Celluclast high dose (CHD); iv) Emsilage (EMS); v) CLD + EMS; vi) CHD + EMS; vii) Silosolve (SLS); viii) CLD + SLS; and ix) CHD + SLS. These treatments were ensiled in 81 x 1 L anaerobic jars for 90 days with nine replicates per treatment. Three samples per treatment were collected before ensiling and after 90 days' ensiling, were analysed for fermentation characteristics and chemical composition. In addition, samples of day 90 were subjected to an aerobic stability test, where they were exposed for five days. Enzyme addition reduced fibre, thus making more sugar available for fermentation. The combination of CHD and EMS reduced silage pH, thus preserving the silage compared with other treatment combinations. Enzyme addition (used at low and high dose), and bacterial inoculants improved fermentation. Enzyme addition improved the chemical composition, but impaired the aerobic stability of PHS. Further work to test these findings on animal performance is warranted.

Evaluation of Silages of Potato, Sweet Potato and Turnip with Rice Straw or Wheat Straw with or without Urea and Studies the Effect of Rations Containing Its Silages on Digestion Coefficients and Rumen Fermentation in Sheep

“…Lactic acid in silages of potato, sweet potato and turnip in this study ranged from 6.31 to 9.65 g/100g DM (6.31 to 9.65%). Similar values were found by Mutavhatsindi et al (2018), Okine et al (2005), Abo-Donia et al (2004) and Hart and Horn (1987). However, these values lie within the normal data of good quality silage as reported by Zobell et al (2005) who stated that the high levels of lactic acid concentration between 3 -14% DM characterize good quality silage.…”

“…Sadri et al (2018) found that DM of silage contained potato and wheat straw was 32.2%, Mutavhatsindi et al (2018) found that DM of silage contained Potato hash and wheat bran was 35.2%, Babaeinasab et al (2015) found that DM of silage contained Potato+wheat straw was 32.2% and Hart and Horn (1987) mentioned that DM of silage containing turnip and wheat straw was 33.2%. Recently studies explained that silage fermentation characteristics of mixing tubers with crop residues lie in the good quality silage (Sadri et al, 2018;Rui-rui et al, 2018;Mutavhatsindi et al, 2018;Babaeinasab et al, 2015). HaiYan et al (1998) noticed that no significant differences in ammonia-N concentration among different silages of turnip containing 6, 12 and 18% rice straw.…”

Chemical Composition and Fermentation Characteristics of Silages of Potato, Sweet Potato and Turnip with Rice Straw and Studies the Effect of Rations Containing Its Silages on Performance and Economical Efficiency of Growing Lambs

“…Sadri et al (2018) found that DM was 32.2% and CP, pH, ammonia-N, butyric acid and lactic acid of potato with wheat straw silage were 4.7%, 4.3, 59.8 g/kg total N, 0.047 g/kg DM and 6.53 g/kg DM, respectively. Mutavhatsindi et al (2018) found that DM was 35.2% and CP, pH, ammonia-N, butyric acid and lactic acid of potato hash with wheat bran silage were 14.1%, 3.51, 0.43% total N, 0.13 g/kg DM and 66.4 g/kg DM, respectively. Rui-rui et al (2018) found that pH, ammonia-N and lactic acid of potato pulp with corn straw silage were 3.79, 1.85% total N and 0.8% DM, respectively.…”

Use of essential oils in combination with fibrolytic enzymes to decrease in vitro ruminal methane production

“…Although fibrolytic enzymes have been used successfully to improve rumen fermentation with high forage diets (Van de Vyver & Cruywagen, 2013), there is an associated increase in methane production because of a higher proportion of acetate in the fermentation product (Gemeda et al, 2014;Gemeda & Hassen, 2015). In contrast, EOs have been shown to mitigate enteric methane production in vitro and in vivo (Mutavhatsindi et al, 2018). In the rumen, the antimethanogenic properties of EOs can militate against hydrogen, which is produced during acetate formation, being channelled into the methanogenic pathways.…”