Mohd F. A. Ramli, David Johnson
Proceedings of the 14th International Peat Congress
Theme IV. Chemical, physical and biological characteristics of peat
We know little about P turnover in peatlands particularly how the phosphatase enzyme activity (PME) by microorganisms could be affected by supplying exudates with different C quality and quantity. We describe an experiment using a synthetic model root exudates with different quality/quantity and C/N ratio using glucose, citric acid and arginine. The results revealed that under aerobic conditions PME was higher and significantly different (P<0.05) from anaerobic conditions. Arginine accelerated more the activity phosphatase enzyme than citric acid and glucose. This result suggests that N-rich amino acids may be a main root exudates component that stimulates the production of phosphatase enzyme.