Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-25T17:22:19.169Z Has data issue: false hasContentIssue false

Effects of Night Temperature on Growth and Development of IR8 Rice

Published online by Cambridge University Press:  03 October 2008

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

Summary

Under controlled environment conditions rice variety IR8 was subjected to night temperatures of 15, 20 and 25°C during each of the three periods (a) sowing to floral initiation, (b) initiation to panicle emergence, and (c) panicle emergence to maturity, with day temperatures of 30°C throughout. Night temperatures of 15°C prevented floral initiation throughout the experiment, an effect partly overcome by transfer to higher temperatures after 102 days but not without yield loss. The optimum night temperature was 20–25°C, with some evidence of change of temperature effects, as distinct from the effect of actual temperature levels. As IR8 was developed under relatively stress-free conditions, its sensitivity to temperatures below 15°C may be greater than in varieties developed elsewhere.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1972

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Aimi, R., Sewamura, H. & Konno, S. (1959). Proc. Crop Sci. Soc. Japan 27, 405.CrossRefGoogle Scholar
Murata, Y. (1966). Int. Rice Commn. Newsl. 15, 20.Google Scholar
Owen, P. C. (1969). Expl Agric. 5, 85.CrossRefGoogle Scholar
Owen, P. C. (1971). Field Crop Abstr. 24, 1.Google Scholar
Shimuzu, M. & Kuno, K. (1966). Proc. Crop Sci. Soc. Japan 35, 91.CrossRefGoogle Scholar