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Grain nitrogen concentrogen #8855

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Grain nitrogen concentrogen #8855

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20 changes: 19 additions & 1 deletion Models/PMF/Organs/ReproductiveOrgan.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -369,7 +369,25 @@ public double MinNconc
{
get
{
return MinimumNConc.Value();
// Biomass allocation today
double dmAllocation = potentialDMAllocation.Storage +
potentialDMAllocation.Structural +
potentialDMAllocation.Metabolic;
// Required the minimum nitrogen content according to biomass at the end of day
// and minimum nitrogen concentration
double requiredMinNContent = (Live.Wt + dmAllocation) * MinimumNConc.Value();
// "requiredMinNContent - Live.N" is the deficit of nitrogen in grain.
// Negative: enough nitrogen for grain
// Positive: no enough nitrogen for grain
// (requiredMinNContent - Live.N) / dmAllocation: Convert to nitrogen concentration
// 0.00001: A small value for minimum nitrogen concentration which cannot
// be zero in the arbitration model
double minNConc = 0.00001;
if (dmAllocation > 0)
{
minNConc = Math.Max(0.00001, (requiredMinNContent - Live.N) / dmAllocation);
}
return minNConc;
}
}

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