When is the filling period of rice? When does the filling period of rice begin?

1. Rice begins to enter the rice filling stage after flowering and heading. The filling period of rice refers to the period from rice ear flowering to grain maturity. Generally, the filling period can be divided into milk ripening period, wax ripening period and complete maturity period. In this process, fertilized eggs will develop into embryos, and fertilized polar nuclei will develop into endosperm.

2. It takes about 30 days from young panicle to heading, which is called jointing and booting stage; It takes about 5-7 days from the time when the rice ear is pulled out from the top stem sheath to full flowering, which is called heading and flowering period. After heading and flowering, it enters the rice filling stage. The duration of grouting is related to varieties and regions. If it is southern early rice, the filling duration is about 10- 15 days. If it is a hybrid mid-late indica rice, the filling time lasts about 25-35 days; If it is japonica rice in the north, the filling time lasts about 40 days.