1, different varieties: early rice is generally planted with indica rice, which is relatively tall. If there is enough rain in spring, there will be less sunshine, and rice will grow slowly at this time; Late rice is generally dominated by "heterosis", that is, hybrid rice, which has a long growth cycle and accumulated a lot of nutrients.

2. Different growth cycles: Generally, the growth period of early rice is 90- 120 days, so early rice varieties are only suitable for growth before July; The growth cycle of late rice is generally around 140 days, which is more than one month longer than that of early rice. Generally, the harvest time is autumn, when the late rice is fully mature.

3. Different sensitivity to light: Early rice is not very sensitive to light and can mature normally all year round; Late rice is very sensitive to short sunshine, and late rice can only grow, bear fruit and have better quality under short sunshine conditions.