PPO plays a key role on aromatic compounds cycling, while the dehydrogenase enzyme activity is commonly used as an indicator of biological activity in soils .
With respect to Hydrolases, urease and invertase are the two important enzymes. Soil invertase catalyses the hydrolysis of
sucrose to glucose and fructose, and is linked to the soil microbial biomass.
Urease plays a vital role in the hydrolysis of urea, it is important to uncover other unknown factors that may reduce the
efficiency of this enzyme in the ecosystem.