ammonium sulphate, ammonium chloride and sodium
nitrate were also tested as nitrogen source in growth and
production media (Maltose (2%), K2HPO4.2H2O-0.2 g, NaCl-
0.05 g, MgSO4.7H2O-0.05 g, FesO4.7H2O-0.01 g,
MnSO4.7H2O-0.007 g, CaCl2.2H2O-0.07 g) incubated for 48 h
at 35°C. Among tested nitrogen sources, organic nitrogen
source presented maximum amylase activity (0.761 U/ml)
when compared to inorganic nitrogen source.
In this study, the highest level of amylase activity (0.761
U/ml) was obtained for peptone and tryptone (0.673 U/ml)
as nitrogen source (Figure 3). Our study found similar
results with the reported by Gupta et al. (2003).