[AgMIP] Critical temperatures for rice, wheat and maize - GCB

[agmip at lists.agmip.org]

Dear all

Please see the attached paper on critical temperatures in wheat, rice and maize. These thresholds need to be included in simulation models if they are not in them.

Unfortunately the paper came too late for IPCC Working Group 2 for AR5.

I would like to acknowledge the efforts of Berta and Anton - two very dedicated MSc students who did the work for this paper as their MSc theses.

Best wishes

John

Professor John R Porter PhD DSc
Climate and Food Security
University of Copenhagen
DENMARK

Chief Editor: The European Journal of Agronomy: http://www.journals.elsevier.com/european-journal-of-agronomy/
Coordinating Lead Author IPCC AR5 for Food Security: www.ipcc.ch
Professor of Climate Change and Agriculture, NRI University of Greenwich, UK: http://www.nri.org/

Please note email has changed to jrp at plen.ku.dk


-----Original Message-----
From: DSSAT - Crop Models and Applications [mailto:DSSAT at LISTSERV.UGA.EDU] On Behalf Of Boote,Kenneth J
Sent: 12. januar 2014 22:42
To: DSSAT at LISTSERV.UGA.EDU
Subject: Re: Inclusion of mungbean (Vigna radiata L.) in DSSAT

All,

I believe you can relatively easily use the CROPGRO legume model to simulate mungbean, starting with either common bean or cowpea or soybean.  We have had more experience with the common bean model than cowpea, relative to calibrations and data, so in that respect it would be better as the template.  But that has the disadvantage of the temperature parameterization (species file) being set more for a relatively more cool-adapted species.  Is mungbean a cooler weather requiring crop like common bean.  Cowpea is more adapted for a warm-season species, but we have much less experience with data for cowpea, and be aware that when I set up the cowpea model, it is designed to give multiple "flushes" of pods (fruits) by using a very short grain-filling duration (SFDUR) that allows quick maturation of early pods and addition of new flushes (indeterminate).  I'm not so sure mung bean is quite like that, but that is easily changed by the cultivar coefficients for that aspect (SFDUR an!
 d PODUR).  We have had the most experience with soybean and it is a warm-season adapted species (maybe like mungbean), but be aware that the soybean model cultivars have very strong daylength-sensitivity and you would need to check into that (easily done by using a low PPSEN slope close to 0.000).  In this respect, soybean may be the best to start from.  Is mungbean sensitive to daylength?

If you get all the files (growth analyses into File T) and have it running reasonably well, I would be willing to look at the simulations to help refine the cultivar and species coefficients to make it work well for mungbean.  Let me know if you get to that step and would like some help on that aspect.  If you get this to work well, we would like to put your data set in the DSSAT, creating a mungbean adaptation (directory in DSSAT), and give you credit for helping to set this up.

Best regards,
Ken Boote

-----Original Message-----
From: DSSAT - Crop Models and Applications [mailto:DSSAT at LISTSERV.UGA.EDU] On Behalf Of Hazel Anne Makahiya
Sent: Sunday, January 12, 2014 4:22 AM
To: DSSAT at LISTSERV.UGA.EDU
Subject: Inclusion of mungbean (Vigna radiata L.) in DSSAT

Good day everyone.

Our group would like to know if it is possible to simulate the growth and yield of mungbean (Vigna radiata L.) in the DSSAT program.
Is it acceptable to choose the CROPGRO-cowpea model for mungbean since we did not see a model yet for mungbean in the DSSAT program? We want to conduct sequence analysis for a rice-mungbean cropping system in the Philippines.

We would appreciate your comment about this. Thank you very much.

Hazel

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