Effect of fungal treatments of fibrous agricultural by-products on chemical composition and in vitro rumen fermentation and methane production

• Published in: Bioresource technology Vol. 129; pp. 256 - 263
• Main Authors: Tuyen, D.V., Phuong, H.N., Cone, J.W., Baars, J.J.P., Sonnenberg, A.S.M., Hendriks, W.H.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.02.2013; Elsevier
• Subjects: Agricultural by-products; Agriculture - methods; animal feed; Animal Feed - microbiology; Animals; Bagasse; Biodegradation, Environmental; Biological and medical sciences; Biotechnology; Byproducts; detergent fiber; digestion kinetics; Food Handling - methods; Fundamental and applied biological sciences. Psychology; Fungi; Fungi - metabolism; In vitro gas production; In vitro testing; Industrial Waste - prevention & control; invitro digestibility; lignin; Maize; Methane; Methane production; Methods. Procedures. Technologies; Microbial engineering. Fermentation and microbial culture technology; Natural gas; Palm; Plants - microbiology; pleurotus-ostreatus; rice straw; Rumen - microbiology; sugarcane bagasse; wheat-straw; White-rot fungi; Methane production; White-rot fungi; Agricultural by-products; In vitro gas production; Methane; Wood destroying fungi; Agricultural product; Rumen; Chemical composition; Fermentation; In vitro
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2012.10.128

► A fungus–substrate interaction was observed on nutritional values of fibrous by-products. ► Nutritional improvement by some fungi linearly increased with the level of lignin in substrates. ► Pleurotus ostreatus is an effective lignin degrader but could not improve the nutritive value of fibrous by-products. ► Treatment of oil palm fronds with Ceriporiopsis subvermispora reduced methane emission from rumen fermentation. Maize stover, rice straw, oil palm fronds and sugarcane bagasse were treated with the white-rot fungi Ceriporiopsis subvermispora, Lentinula edodes, Pleurotus eryngii, or Pleurotus ostreatus at 24°C for 0–6weeks. The fungi increased total gas production from oil palm fronds by 68–132%, but none of the fungi improved the in vitro rumen fermentability of maize stover. C. subvermispora and L. edodes increased total gas production of sugarcane bagasse by 65–71%, but P. eryngii and P. ostreatus decreased it by 22–50%. There was a linear relationship (P<0.05) between the proportion of lignin in the original substrate and the increase in in vitro gas production observed for C. subvermispora and L. edodes treatments (R2=0.92 and 0.96, respectively). It is concluded that C. subvermispora and L. edodes have a particularly high potential to improve the nutritive value of highly lignified ruminant feeds.