influence leachate Nitrogen

[Christof Kluß]

Hi

is there an easy way to influence leachate N? I have much to high N-leaching in my third simulation year (and much to low soil and plant N). So far I only use a very simple ground configuration that seems unfortunately to be insufficient. :(

I am grateful for any tips

Christof

(defhorizon Layer1 FAO3  "..."
  (clay 11 [%]) (silt 29 [%]) (sand 60 [%]) (humus 2.8 [%])
  (C_per_N 12 [g C/g N]) (dry_bulk_density 1.5 [g/cm^3]))

(defhorizon Layer2 FAO3  "..."
  (clay 21 [%]) (silt 28 [%]) (sand 51 [%]) (humus 1.7 [%])
  (C_per_N 11 [g C/g N]) (dry_bulk_density 1.7 [g/cm^3]))

(defhorizon Layer3 FAO3  "..."
  (clay 24 [%]) (silt 25 [%]) (sand 51 [%]) (humus 0.9 [%])
  (C_per_N 13 [g C/g N]) (dry_bulk_density 1.7 [g/cm^3]))

;; We build the column from the horizons.
(defcolumn Kiel default  "..."
  (Soil (horizons (-30 [cm] Layer1) (-60 [cm] Layer2) (-90 [cm] Layer3))
        (border -1 [m])
        (MaxRootingDepth 60.0 [cm]))
  (OrganicMatter original
                 (init (input 1400 [kg C/ha/y])
                       (root 480 [kg C/ha/y])
                       (end -25 [cm]))) ;; depth of the plowing layer
  (Groundwater deep))

(column Kiel)

[Per Abrahamsen]

Hi Christof.

Too high leaching is usually related to too low crop uptake. So my suggestion would be to look at the crop production. Is it high enough? If not, what limit its? Nitrogen or water? Is the soil nitrogen available at the time where the crop is able to benefit from it?

Sorry, no quick fix.

Regards,

Per A.

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