Fungal strain and incubation period affect chemical composition and nutrient availability of wheat straw for rumen fermentation

• Published in: Bioresource technology Vol. 111; pp. 336 - 342
• Main Authors: Tuyen, Van Dinh, Cone, J.W, Baars, J.J.P, Sonnenberg, A.S.M, Hendriks, W.H
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01-05-2012
• Subjects: animal feed; Animals; Basidiomycota - metabolism; cellulose; Ceriporiopsis subvermispora; crop residues; delignification; detergent fiber; feeds; Fermentation; gas production (biological); gases; in-vitro digestibility; lignin; nutrient availability; nutritive value; organic matter; pleurotus-ostreatus; rumen; Rumen - metabolism; rumen fermentation; Ruminantia; solid-state fermentation; sugarcane bagasse; trametes-versicolor; Triticum - metabolism; Triticum aestivum; wheat straw; white-rot fungi
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2012.02.001

Eleven white-rot fungi were examined for their potency to degrade lignin and to improve the rumen fermentability of wheat straw. The straw was inoculated with the fungi and incubated under solid state conditions at 24°C for 0–49days to determine changes in in vitro gas production and chemical composition. Results show that some fungi could degrade lignin by as much as 63%, yet the delignification was highly correlated with the degradation of hemicellulose (r=0.96). Reduction in lignin was poorly (r=0.47), but the ratio between lignin and cellulose loss was strongly (r=0.87) correlated with the increase in gas production. Treatment with Ceriporiopsis subvermispora for 49days increased total gas production of the straw from 200 to 309ml/g organic matter (OM). It was concluded that some fungi highly selective for lignin and not for cellulose are able to improve the nutritive value of wheat straw as a ruminant feed.