The influence of water management practices on the hydrologyof
paddy
fields does not only affect the
fluxes of water and dissolved
nutrients, but also the soil moisture status and consequently the soil
redox conditions. In this work we evaluated the effect of water
management on dissolved inorganic N considering the importance
of redox-driven processes on plant N availability, and the implica-
tions NO3
concentrations and
fluxes may have on surface and
subsurface water quality. The equilibrium between the supply of
bioavailable N and losses indeed depends on the transformation and
transport of different N species in the soil–water–plant–atmosphere
system (Chowdary et al., 2004). Our results clearly evidenced that
NH4
+ and NO3
contents in the soil solutionwere stronglyaffected by
water management