Calibration of the average daily photosynthetic conversion efficiency RUE for CERES-Rice

[NadaBenMhenni]

We found that CERES-Rice model fails to react to solar radiation SRAD. Thus we are looking into the necessity
to calibrate the average daily photosynthetic conversion efficiency RUE (g/MJ), which is hardcoded in the daily biomass calculation module ( RI_Grosub.for; code snippet ⬇️ ).

      PAR     = 0.5*SRAD     !PAR local variable
     
      PLSC    = AMIN1((0.5+0.001*PLANTS),1.0)
      TL      = EXP(-0.85*ROWSPC*PLSC)               ! .65
      Y1      = EXP(-0.625*LAI)                      ! .625
      Y2      = EXP(-TL*LAI)
      EPLANTS = PLANTS**0.975
      RUEA    = 5.85   !6.85      UPS UH 03/21/03
      RUEX    = 0.65

      PCARB   = RUEA*PAR**RUEX/EPLANTS*(1.0-AMIN1(Y1,Y2))

We are looking into the modification of RI_Grosub.for to read an external file of RUE data, and ultimately add RUEA and RUEX in the subroutine arguments, and reading the external file in an upper level subroutine.

[lpmorenoc]

I recommend that you explore the subroutine RI_IPCROP.for which is reading the parameters from the SPE file RICER048.SPE.

[chporter]

Per @GerritHoogenboom : We need to create an Ecotype file for CERES-Rice. It is the only model that does not have an Ecotype file.

[NadaBenMhenni]

Per @GerritHoogenboom : We need to create an Ecotype file for CERES-Rice. It is the only model that does not have an Ecotype file.

Thank you for your comment, @chporter . Is anyone working on this already? Also, is there a specific reason why CERES-Rice doesn't have an Ecotype file?