Flower time adjusting method applied to mechanized seed production of hybrid rice

The invention discloses a flowering time adjusting method applied to mechanized seed production of hybrid rice, and belongs to the technical field of seed production of hybrid rice. The flowering time adjusting method provided by the invention comprises the following steps: (1) preparing a flowering time adjusting agent suitable for mechanized seed production of hybrid rice; (2) setting spraying time according to flowering habits of the sterile line and the restorer line; (3) spraying a flowering time regulator by using a plant protection unmanned aerial vehicle; and (4) plant protection unmanned aerial vehicle supplementary pollination. According to the flowering time adjusting method, before rice pollination, when a plant protection unmanned aerial vehicle is used for spraying a flowering time adjusting agent to rapidly and effectively adjust the flowers of the sterile line, the sterile line stably and intensively blooms and coincides with the flowering peak period of a restoring line, the problem that flow