The rest, he says, is lost to the environment: "Unless an equivalent amount is denitrified
back to molecular [N.
In contrast, almost the entire denitrified
nitrate in the Kinloch profile appears to have been native nitrate, despite its concentration having been low, similar to the Rangiatea profile.
Small N-loads (185 kg N/ha) in the non-Pin Gin soils imply that [approximately equal to] 1315 kg/ha of the nitrate-N that leached below the root-zone during the last 50 years, under the minimum leaching scenario, either denitrified or entered lateral-flow and/or deep groundwater.
Low retention in non-Pin Gin soils indicates that most of the nitrate that leached below the root-zone probably entered water bodies and/or denitrified.
2]O-N: NO-N ratios occurred on Day I when native inorganic-N was presumably denitrified
following the addition of treatments that increased soil anaerobicity.
Riley WJ, Matson PA (2000) NLOSS: a mechanistic model of denitrified
day was denitrified
over a 23-day period; 93% of this loss was as [N.
15]N not denitrified
Nitrate recovered as a result of not Treatment (denitrified
) straw addition recovered After 4 days Control 9.
3]-N was probably denitrified
or immobilised because of the long residence time of N in the soil under reasonably high temperatures (Table 1).
After 5 years, the predicted fluxes were 10 kg/ha denitrified
, 389 kg/ha depleted from soil organic matter, and about 58 kg/ha leached.