Bioconversion in Ryegrass-Fescue Hay by Pleurotus ostreatus to Increase Their Nutritional Value for Ruminant

Carbohydrates from lignocellulosic feed can be released by basidiomycete fungi for ruminal fermentation. This study aimed to evaluate the bioconversion of hay ryegrass-fescue (Lolium perenne—Festuca arundinácea) solid state fermentation with Pleurotus ostreatus, obtain superior quality hay. After only 14 days fermentation, crude protein (CP) (4.73 5.16%), and non-fibrous carbohydrates (NFC) (20.84 25.04%) increased, while neutral detergent fiber (NDF) (68.72 64.87%) acid lignin (5.88 1.98%) decreased. The enzymatic biodegradation carried out P. ostreatus was verified, through measurements activity. Lignin peroxidase (LiP) laccase (Lac) reached higher activity on day (19.51 U/L 34.17 U/L, respectively), whereas manganese (MnP) displayed stability up 21 (between 6.54 7.75 U/L). In conclusion, results indicate that is promising improve fibrous feedstocks were considered optimal