Dear Dr.Kyungsuk,


  
Regards and best wishes,


  
I
 am answering your question partially.Even though these days i am not 
using DSSAT software i am very much sure the information that you asked is available.However, the following theoretical information may be useful to 
you .This paragraph is taken from my book"Basic principles of Agricultural Meteorology".
Sincerely,
Murthy.


  
Cardinal temperatures


There are three points of temperature which influence the growth of
crop plants. These are termed as "cardinal points" and the synonymous
term is `car­dinal temperature’.


1       A minimum temperature
below which growth ceases (minimum cardinal temperature).


2       An optimum temperature
at which the plant growth  proceeds with
greatest rapidly (optimum cardinal temperature).


3       A maximum temperature
above which plant growth ceases (maximum cardinal temperature).


 


Table 3.1. Cardinal temperature for different crops.




 
  
   S.No.
  
  
  Crop
  
  
  Min. Cardinal
  temp. oC
  
  
  Opt. Cardinal
  temp’
  
  
  Max. Cardinal
  tempoC
  
 
 
  
  1.
  
  
  Wheat and Barley
  
  
  0-5
  
  
  25-31
  
  
  31-37
  
 
 
  
  2.
  
  
  Sorghum
  
  
  15-18
  
  
  31-36
  
  
  40-42
  
 




 




> Date: Fri, 25 Mar 2011 15:54:52 +0000
> From: [log in to unmask]
> Subject: Cardinal temperature of winter wheat
> To: [log in to unmask]
> 
> Hi all,
> 
> I am looking for the cardinal temperature(base, upper and lower optimum
> and maximum) regarding to winter wheat in CERES-wheat ver. 4.0.
> Does anyone know what these temperatures are given in model?
> 
> Thank you very much for your help in advance.
> 
> Kyungsuk