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Effects of Cool Periods (15° C) at Night on Taichung (Native) No. 1 Rice

Published online by Cambridge University Press:  03 October 2008

P. C. Owen
P. C. Owen
Affiliation:
Division of Land Research, CSIRO, Canberra, Australia
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Summary

Taichung (Native) No. 1 rice was grown under controlled conditions with a basic temperature regime of 30°C by day and 20°C by night. Periods of 2, 4 and 12 hours at 15°C (59°F) were imposed during darkness for the first or second 40 days, or for the first 80 days after sowing. Floral initiation was delayed by cool periods of 2 hours at night or longer, and delay from this cause was always accompanied by reduced grain yields, resulting from fewer spikelets per panicle or increased tiller sterility. This effect was not overcome when the cool periods ceased after floral initiation. Cool periods longer than 4 hours had a greater effect when they were given in the first 40 days.

Type
Research Article
Information
Experimental Agriculture , Volume 8 , Issue 4 , October 1972 , pp. 289 - 294
Copyright
Copyright © Cambridge University Press 1972

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References

REFERENCES

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