"Early (seasonal) rice" Southern indica rice, which is cultivated earlier and matured earlier, is different from middle rice and late rice because of different seasons.

Late rice:

[Late rice] Late-transplanted or late-maturing rice.

First, the photosensitivity is different

Late rice: The vegetative growth period is the longest (74.2 days), and the basic vegetative growth period is the shortest, and the basic vegetative growth period is also smaller because of its strong photosensitivity.

Early rice: The vegetative growth period shortened by short sunshine and high temperature is the shortest (23 days), but the vegetative growth is slightly larger than that of late rice.

Second, temperature sensitivity is different.

The upper limit temperature of rice growth is generally 40℃, but the upper limit temperature of rice development will not exceed 28℃. Late rice is more sensitive to temperature than early rice.

Third, the harvest time is different.

The growth period of one-season rice sown in early May is generally between 140- 160 days, and the harvesting time should be in the middle of 10. In areas where crops are harvested twice a year, early rice is usually harvested in late July.

Late rice is usually harvested in the middle and late June of 65438+ 10, and the growth period of varieties is different; As for Hainan in three seasons of the year.

Reference source: Baidu Encyclopedia-Late Rice

Reference source: Baidu Encyclopedia-Early Rice