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

AbstractA 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.