The influence of light intensity on the photoperiodical behaviour of the rice plant.

Abstract

The photoperiodic behaviour of two varieties of rice, Kameji and Nero di Vialone was compared in an experiment in 1952 in which the rice plants were grown in 12 hr. daylight only and in 12 hr. daylight plus 6 hr. light from a fluorescent tube with an intensity ranging from 1-80 foot-candles. The extension of the period sowing-to-earing caused by increasing intensity of the supplemental light was most notable over ranges of light-intensity of 1-2 and 1-10 foot-candles in the case of Nero di Vialone and Kameji, respectively. Increasing light-intensity from 2-80 foot-candles had no effect on the length of the period sowing-to-earing in the case of Nero di Vialone; in the case of Kameji there was a steady increase of the length of the period sowing-to-earing as the light intensity was increased from 10-80 foot-candles.-W.J.B. (Abstract retrieved from CAB Abstracts by CABI’s permission)