Dear Hiroshi,

I am not acquainted with maize cultivar NC+4616, but when I was still at
CIMMY, we determined from some tropical lowland maize cultivars an average
duration of the linear grain filling phase of about 31.5 days, which
corresponds with your 800/25=32. During this phase, about 85% of the final
grain weight was accumulated. The other 15% was accumulated during the lag
and terminal phases. Adding 15% to your 9500 kg ha-1 would bring you close
to 11 t ha-1. The maximum grain filling rate during the linear phase may be
higher than your 8 mg kernel-1 d-1. We, for instance, determined an average
close to 10 mg kernel d-1. If you add another 20%, you reach about 13 t
ha-1.
Do you have any experimental data? What are usual grain yields?

Regards,

Anne Elings


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Anne Elings
Department of Crop Production and Ecology
Research Institute for Agrobiology and Soil Fertility
Wageningen University and Research Centre
Bornsesteeg 65, 6708 PD Wageningen
P.O. Box 14, 6700 AA Wageningen
tel. +31 - 317 - 475826
fax + 31 - 317 - 423110
email [log in to unmask]
internet http://www.ab.wageningen-ur.nl/
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