public static void AdjustAvailableN(ICohort cohort, ActiveSite site, double[] actualANPP)
{
// Because Growth used some Nitrogen, it must be subtracted from the appropriate pools, either resorbed or mineral.
double totalNdemand = AvailableN.CalculateCohortNDemand(cohort.Species, site, cohort, actualANPP);
double adjNdemand = totalNdemand;
double resorbedNused = 0.0;
//double mineralNused = 0.0;
// Use resorbed N first and only if it is spring time unless you are evergreen.
double leafLongevity = SpeciesData.LeafLongevity[cohort.Species];
if ((leafLongevity <= 1.0 && Century.Month > 2 && Century.Month < 6) || leafLongevity > 1.0)
{
double resorbedNallocation = Math.Max(0.0, AvailableN.GetResorbedNallocation(cohort, site));
resorbedNused = resorbedNallocation - Math.Max(0.0, resorbedNallocation - totalNdemand);
AvailableN.SetResorbedNallocation(cohort, Math.Max(0.0, resorbedNallocation - totalNdemand), site);
adjNdemand = Math.Max(0.0, totalNdemand - resorbedNallocation);
}
// Reduce available N after taking into account that some N may have been provided
// via resorption (above).
double Nuptake = 0.0;
if (SiteVars.MineralN[site] >= adjNdemand)
{
SiteVars.MineralN[site] -= adjNdemand;
//mineralNused = adjNdemand;
Nuptake = adjNdemand;
}
else
{
adjNdemand = SiteVars.MineralN[site];
//mineralNused = SiteVars.MineralN[site];
SiteVars.MineralN[site] = 0.0;
Nuptake = SiteVars.MineralN[site];
}
SiteVars.TotalNuptake[site] += Nuptake;
if (OtherData.CalibrateMode && PlugIn.ModelCore.CurrentTime > 0)
{
//Outputs.CalibrateLog.Write("{0:0.00}, {1:0.00}, {2:0.00}, {3:0.00},", deltaWood, deltaLeaf, totalMortality[0], totalMortality[1]);
Outputs.CalibrateLog.Write("{0:0.00},{1:0.00},{2:0.00},", resorbedNused, Nuptake, totalNdemand);
}
}
//--------------------------------------------------------------------------
//N limit is actual demand divided by maximum uptake.
private double calculateN_Limit(ActiveSite site, ICohort cohort, double NPP, double leafFractionNPP)
{
//Get Cohort Mineral and Resorbed N allocation.
double mineralNallocation = AvailableN.GetMineralNallocation(cohort);
double resorbedNallocation = AvailableN.GetResorbedNallocation(cohort, site);
//double LeafNPP = Math.Max(NPP * leafFractionNPP, 0.002 * cohort.WoodBiomass); This allowed for Ndemand in winter when there was no leaf NPP
double LeafNPP = (NPP * leafFractionNPP);
double WoodNPP = NPP * (1.0 - leafFractionNPP);
double limitN = 0.0;
if (SpeciesData.NFixer[cohort.Species])
{
limitN = 1.0; // No limit for N-fixing shrubs
}
else
{
// Divide allocation N by N demand here:
//PlugIn.ModelCore.UI.WriteLine(" WoodNPP={0:0.00}, LeafNPP={1:0.00}, FineRootNPP={2:0.00}, CoarseRootNPP={3:0.00}.", WoodNPP, LeafNPP);
double Ndemand = (AvailableN.CalculateCohortNDemand(cohort.Species, site, cohort, new double[] { WoodNPP, LeafNPP }));
if (Ndemand > 0.0)
{
limitN = Math.Min(1.0, (mineralNallocation + resorbedNallocation) / Ndemand);
}
else
{
limitN = 1.0; // No demand means that it is a new or very small cohort. Will allow it to grow anyways.
}
}
if (PlugIn.ModelCore.CurrentTime > 0 && OtherData.CalibrateMode)
{
Outputs.CalibrateLog.Write("{0:0.00},{1:0.00},", mineralNallocation, resorbedNallocation);
}
return(Math.Max(limitN, 0.0));
}
