Denitrification in Four California Soils: Effect of Soil Profile Characteristics

摘要: The effects of soil profile characteristics upon rate and products denitrification were investigated using four soils in laboratory columns under steady-state water flow conditions. A general relationship existed between texture amount denitrification. Soils with heavy textured subsoils readily reduced added NO₃⁻. However, the lowest clay content had restricted surface horizon greatest is a result It was concluded that any condition which impedes will be positively related to spatial variability likely as great observed movement. ratio N₂ N₂O found during extremely variable measured values from 100:1 1:4. low concentrations occurred where occurring deep profile, but there no indication this concentration further reduction diffused through profile. Our data indicate it currently not possible accurately predict relative amounts produced most soils, estimates agricultural lands have large uncertainty factor.