Effects of Wind Velocity on the Rice Plant in the Heading Stage (1)

Abstract

1) We have studied on the effects of wind velocity generated in the wind tunnel on the flowering and fertilization of rice plant at the heading stage.
2) Because the flowering of the rice plant was affected by meteorological factors, such as temperature, humidity and solar radiation, in the present experiment, the effect of wind velocity on the flowering was not clarified.
3) The percentage of abortive grains increased as the wind velocity became higher, and this was more definite in the recessive spikelets.
4) The fertility percentage of spikelets flowered before the day of treatment was high, and it seemed that the effect of the wind on such spikelets was slight.
Recessive spikelets are apt to be affected by wind, but dominant ones are not.
Therefore it may be said that the number of recessive spikelets which flower after the day of treatment controls the sterility percentage of the ear.