标题：Influence of Aspergillus niger or Saccharomyces cerevisiae -Fermented Napier Grass ( Pennisetum purpureum ) Mixed with Fresh Cassava Root on Blood Parameters and Nutrient Digestibility in Growing Beef Cattle
摘要：Objective: The current study was designed to determine the effect of Aspergillus niger or Saccharomyces cerevisiae fermented napier grass (NG) mixed with fresh cassava root (CR) on the blood biochemistry, blood enzymes, hematological parameters and nutrient digestibility in growing beef cattle. Materials and Methods: Four male beef cattle (150±10 kg) were randomly assigned according to a 4×4 Latin square design, to receive four dietary treatments: Napier grass (Control), non-microbial-fermented NG mixed with CR (F-NGCR), A. niger -fermented NG mixed with CR (AF-NGCR) or S. cerevisiae -fermented NG mixed with CR (SF-NGCR). Results: The results revealed the dry matter (DM) intake was similar among the treatments (p>0.05). The intake of organic matter (OM), ether extract (EE), neutral detergent fiber (NDF) and acid detergent fiber (ADF) were not significantly different among the treatments (p>0.05). However, the intake of crude protein (CP) was affected by AF-NGCR and SF-NGCR compared with the control (p<0.05). The digestibility of DM, OM, CP, EE and NDF were increased in the beef cattle that consumed AF-NGCR and SF-NGCR (p<0.05). The blood biochemistry, blood enzymes and hematological parameters did not differ among the treatments (p>0.05). Conclusion: Aspergillus niger and S. cerevisiae -fermented NG mixed with CR could improve the CP intake and nutrient digestibility and had no effect on the blood biochemistry, blood enzymes and hematological parameters in growing beef cattle.
