Effect of Fibrolytic Enzymes Produced from an Improved Mutant of Chaetomium thermophile DG-76 on the Performance of Beetal-Dwarf Crossbred Goat

This study was conducted to assess the performance and economical benefits of use of enzyme supplementation in an intensive feeding system in beetal x dwarf (crossbred) male goats. the fibrolytic enzyme produced from chaetomium thermophile (dg-76), contained 5.8±0.1 u/ml, 8.3±0.2 u/ml, 6.2±0.2 u/ml, 170±2.2 u/ml and 2.2±0.02 mg/ml of filter paper (fp)-ase, cmc-ase, β-glucosidase, xylanase and extra cellular protein, respectively. the enzyme was mixed @ 1% v/w in total mixed ration (tmr) containing 15.14% cp, 20.75% adf and 35.24% ndf which was offered for 60-d to two similar groups of 10 in each male goats weighing control 33.42±1.1 kg and fibrolytic enzyme supplemented (fes) group 34.02±1.13 kg. there was a significant improvement (p=0.0001) in weight gain in enzyme supplemented than control group (5.01 vs 4.1 kg). average daily live weight gain (adlwg) was found to be 83.49 g in fes compared with 68.33 g in control and was statistically significant (p=0.0001). there was a non-significant (p=0.2875) decrease of 3.75% in feed intake in control group compared with fes, however, the feed conversion ratio (fcr) varied significantly (p=0.0008) and was 15.08% lower in fes than the control. overall the enzyme supplementation resulted in 31.25% increase in net profit compared with the control group.