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Responses of rice to photoperiod

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Authors

D. P. Ormrod, University of California, Davis.
W. A. Bunter, University of California, Davis.
D. C. Finfrock, University of California.
J. R. Thysell, Rice Experiment Station, Biggs.

Publication Information

California Agriculture 14(5):6-7.

Published May 01, 1960

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Abstract

Experiments indicate that photoperiod, or daylength, is of great importance in the heading of rice plants and that maturity of rice varieties can be classified in the field by their sensitivity to above-optimum daylength. Early varieties such as Colusa are less sensitive and will head in the field under the longer days of midsummer, while Caloro, a midseason variety, is more sensitive and heads in the field later in the summer after the photoperiod has shortened considerably. A very late variety such as Texas Patna 49 is highly sensitive to photoperiod and does not head until the days have become much shorter in the fall.

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Author notes

The above progress report is based on Research Project No. 176A.

Responses of rice to photoperiod

D. P. Ormrod, W. A. Bunter, D. C. Finfrock, J. R. Thysell
Webmaster Email: wsuckow@ucanr.edu

Responses of rice to photoperiod

Share using any of the popular social networks Share by sending an email Print article
Share using any of the popular social networks Share by sending an email Print article

Authors

D. P. Ormrod, University of California, Davis.
W. A. Bunter, University of California, Davis.
D. C. Finfrock, University of California.
J. R. Thysell, Rice Experiment Station, Biggs.

Publication Information

California Agriculture 14(5):6-7.

Published May 01, 1960

PDF  |  Citation  |  Permissions

Author Affiliations show

Abstract

Experiments indicate that photoperiod, or daylength, is of great importance in the heading of rice plants and that maturity of rice varieties can be classified in the field by their sensitivity to above-optimum daylength. Early varieties such as Colusa are less sensitive and will head in the field under the longer days of midsummer, while Caloro, a midseason variety, is more sensitive and heads in the field later in the summer after the photoperiod has shortened considerably. A very late variety such as Texas Patna 49 is highly sensitive to photoperiod and does not head until the days have become much shorter in the fall.

Full text

Full text is available in PDF.

Author notes

The above progress report is based on Research Project No. 176A.


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