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Pre-release of ORYZA v3.2
Pre-release notes for ORYZA v3.2
The new version 3.2 of the ORYZA crop model has been expanded from the officially released version 3 in 2022 and 2023. Please note that version 3.2 is still in the testing phase and is not yet mature. We are pre-releasing it to collect user feedback on bugs and suggestions for improvement before the official release. You are welcome to use it freely at your own risk, and we encourage you to communicate with us regarding any questions or concerns about version 3.2.
ORYZA v3.2 Pre-release Version
The updates in version 3.2 include the following:
Sub-module for Estimating CO2, CH4, and N2O Emissions:
For methane (CH4) emissions, users can select one of two computation algorithms:
General process-based approach
Numerical and process mixed approach
Calibration of Model Predictions for Greenhouse Gas (GHG) Emissions:
Users can calibrate GHG emissions predictions by adjusting the partitioning of cellulose, carbohydrates, and lignin in fresh and old organic matter.
Functions to Quantify the Effects of Chemical Nitrogen Fertilizer:
The model now includes functions to assess the impact of different types of chemical nitrogen fertilizers (Urea, Ammonium, and Nitrate) and fertilizing depth on crop growth, yield, carbon sequestration, and GHG emissions.
Functions to Quantify the Effects of Organic Fertilization or Crop Stubble Management:
These functions allow users to evaluate the impact of organic fertilization and crop stubble management on crop growth, soil carbon sequestration, and GHG emissions.
Installation Instructions for ORYZA v3.2:
You can download the ORYZA v3.2 executable program from the ORYZA model homepage. The program can be run either in the user interface or as an independent executable.
To run the program in the simple user interface, follow these steps:
Download and install version 3 first.
Locate the folder where ORYZA3.exe is installed.
Copy the downloaded ORYZA3.2.exe to the located folder.
Remove the ORYZA3.exe from the folder.
Rename the ORYZA3.2exe with ORYZA3.exe.
To run the program as an executable file:
Copy the downloaded ORYZA3.2.exe file to your working folder.
Double-click the ORYZA3.2.exe to run the model.
Additional outputs:
With the application of ORYZA version 3.2, users can get additional outputs in seasonal and daily output files (Table 1).
Table 1: The list of additional output variables in version 3.2
Updates on the inputs:
(Please check the details in the input template associated with the download package)
1) Additional inputs in crop file:
*--------------------------------------------------------------------
* 11. Parameters for estimating CH4 emission
*--------------------------------------------------------------------
* When the CH4MOD was used
PVICH4 = 1.0 ! Variety relative index in CH4 generation, 0 to 2.0 from no CH4 to strongest
* ! its default value is 1.0 if it was not provided
Q10CH4 = 3.5 ! The Q10 value for the soil temperature effects on CH4 generation
* ! its default value is 3.0 if it was not provided
WAGTMAX = 16000.0 ! The maximum aboveground biomass (kg/ha)
* When the GENERAL was used
VASC_A = 2.0 ! Vascularity index A for CH4 emission through plant, aerenchyma conductance to CH4 transport
VASC_B = 50.0 ! Vascularity index B for CH4 emission through plant, root resistance to CH4 uptake
2) Additional inputs in management file:
CH4APPS = 'GENERAL' ! Computing CH4 emissions by a general alogirthms
*CH4APPS = 'CH4MOD' ! The CH4MOD algorithm is used for computing the CH4 emissions
HARFRAC=0.5 ! The removed fraction of stem and leaves, default: 0.95
STUBBLDD = 15.0,15.0 ! The days after the physiological maturity and depth (cm) of stubble incorporation
* The stuble will be incorporated into the 0 to the depth evenly. Default: turn stubble to surface at maturity
*FERDTYPE = 5.0, 0.5, 0.1, 0.4, 0.0, 0.0 ! Application depth (cm), and fraction for Urea, NH4, NO3,
* organic N fertilizers, and Organic C. Default is 1.0, 1.0, 0.0, 0.0, 0.0, 0.0
* Define the fertilizer types and depth, first column for depth (cm), column 2 to 5 for fractions of different fertilizer
* It must have the same events as FERTIL, it combine FERTYPE and FERDEP,
* Ot is alternative way for details on types and depths
NTYPEDEP =
10.0, 0.0, 1.0, 0.0,0.0,0.0,
1.0, 1.0, 0.0, 0.0, 0.0,0.0,
0.0, 1.0, 0.0, 0.0, 0.0,0.0
*Fresh organic residue input at land surface if it is applicable
*SORGANC = 1000.0 ! Organic fertilizer carbon applied (kg C/ha)
*SORGANN = 20.0 ! Organic nitrogen applied (kg N/ha)
*APDOYDEP = -10, 0, 10 !The organic C and N date, minimum depth (m), and maximum depth (m). If it was
! not provided, the applied date is the EMD and EMYR, and at surface. Otherwise, the negative
! for date indicates the days before EMD, positive value is for days after EMD
*SFCarboh = 0.4 !* The fraction of carbohydrate in applied fresh organic fertilizer dry matter
*SFCellulo = 0.5 !* The fraction of cellulos in applied fresh organic fertilizer dry matter
CO2C_OBS = ! The observation of CO2 emissions in kg C/ha/d
2008.00, 222.00, 9.69,
2008.00, 234.00, 5.39,
2008.00, 250.00, 2.69,
2008.00, 263.00, 16.59
CH4C_OBS = ! The observation of CH4 emissions in kg C/ha/d
2008.00, 222.00, 0.69,
2008.00, 234.00, 1.39,
2008.00, 250.00, 2.69,
2008.00, 263.00, 1.59
N2ON_OBS = ! The observation of N2O emissions in kg N/ha/d
2008.00, 222.00, 0.19,
2008.00, 234.00, 0.23,
2008.00, 250.00, 0.57,
2008.00, 263.00, 0.09
3) Additional inputs in soil file:
FCarboh = !* fraction of carbohydrate in the organic matter
FCellulo = !* fraction od cellulos in the organic matter