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Corn yield in relation to photoperiod, night temperature, and solar radiation

✍ Scribed by Jen-Hu Chang

Publisher
Elsevier Science
Year
1981
Weight
491 KB
Volume
24
Category
Article
ISSN
0002-1571

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✦ Synopsis

Chang, Jen-hu, 1981. Corn yield in relation to photoperiod, night temperature and solar radiation. Agric. Meteorol., 24: 253--262.

The average corn yield in high latitudes exceeds that in the tropics by 4 times in the field and by 2.5 times in experimental plots. This difference between 4 and 2.5 largely reflects the technological inferiority of tropical farming. The difference in experimental yield is largely caused by climatic factors. Hybrid corns are adapted to long days in excess of 14 h 30 min. Long day length also promotes photosynthesis for all corn varieties. High night temperature reduces the corn yield in the tropics by some 30%. Solar radiation is a minor factor in explaining the yield difference on a global scale.

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