Effect of Substrate-Based Solid Fibrolytic Enzyme Treatments on in vitro Digestibility of Cotton Stalk and Paddy Straw in Goats

A study was conducted to assess the effect of in vitro dry matter digestibility (IVDMD) of cotton stalk and paddy straw treated with substrate-based solid fibrolytic enzymes viz., dolomite, monocalcium phosphate (MCP), dicalcium phosphate (DCP) and lime stone powder (LSP). Cellulase and xylanase activities were highest (P<0.01) in dolomite-based substrate (156.83 and 72.85 IU/g, respectively) among the various substrates. The enzyme remained stable even at temperatures as high as 60°C. IVDMD of cotton stalk was significantly higher (P<0.01) higher in dolomite (37.57±1.04%) followed by DCP (32.21±0.92%), LSP (32.20±1.78%) and MCP (29.21±0.90%). Similarly, IVDMD of paddy straw was significantly higher (P<0.01) in dolomite (47.76±0.88%) followed by DCP (45.35±0.92%), LSP (42.54±1.04%) and MCP (40.21±1.52%). The study concludes that IVDMD of cotton stalk and paddy straw was higher in dolomite than, MCP, SCP and LSP substrates.