N. Calvero wrote:
 
>
> 25 September 1996
>
> I NEED HELP. I would like to couple my rice blast model (BLASTSIM.2) with
> CERES-Rice and have identified four basic coupling points.
>
> 1. Light use efficiency
> 2. Carbohydrate assimilation
> 3. Maintenance respiration
> 4. Death rate of leaves
>
> I have no CERES-Rice documentation to inquire where I should be looking. Is
> there anybody out there who can tell me what subroutines of the CERES-Rice I
> can find these four points. Likewise, I also welcome suggestions of what
> other coupling points should I consider. Thanks
> _____________________________________________________
> Nong Calvero Jr.       e-mail: [log in to unmask]
> EPPD-IRRI, PO Box 933  phone: (63-2) 812-7686 loc 601
> Manila, Philippines    fax: (63-2) 891-1292
>
> "...just do it!"
> _____________________________________________________
 
dear Nong Calvero:
 
I worked on ceres rice for my MS research therefore i understand you
well. Documentation is not a strong part of ceres rice!
I think that maintenance respiration you can forget. Ceres -Rice V3.0
uses the approach of Light use efficiency (LUE), therefore growth and
maintenance respiration are "considered" at once with Ps. This is done
in subroutine GROSUB when PCARB is cauculated.
 
LUE is a constant value all along crop growth!
 
For Death rate of leaves, also look in GROSUB,
 
PLAG is teh daily growth of leaf area per plant thais is sumed everyday
to PLA.
SLAN leaf senescence since emergence due to normal phenological
development and is estimated in a different way whenever the
phenological stage changes.
 
I sugest you to look at the book "CERES-Maize - a simulation model of
maize growth and development" edited by C.A. Jones and J.R. Kiniry
and by comparison understand what Ceres-Rice is all about!
 
Good luck!
 
Ricardo Braga
 
 
 =======================================================================
 
Ricardo P. Braga
Graduate Student
University of Florida
Agricultural and Biological Enginnering Department
 
1 Frazier Rogers Hall
PO BOX 110570
Gainesville, Florida 32611-0570
USA
 
E-mail: [log in to unmask]
URL: http://www.agen.ufl.edu/~luyten/jwj/ricardo.html  (Ph.D. Project)
URL: http://www.agen.ufl.edu/~rbraga                   (personal)
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