Although rice is a thermophilic crop, rice is also affected by the appropriate temperature at which it grows and develops at various growth stages.

1. Adverse effects of insufficient light on rice growth

Rice is a short-day crop, and long-term illuminating will shorten the vegetative growth period, shorten the growth period, and reduce the yield. If the seedling period is not enough, the seedlings are easy to grow; if the rainy days are during the rice tillering, the tillers are delayed, the number of tillers is reduced, and the lower the light intensity, the more severe the inhibition of tillering.

2. Prevention and control of rice heat damage

In the rice seedling stage, especially in the condition of using heat preservation cultivation technology, in order to prevent the occurrence of high temperature heat damage, it is necessary to strictly follow the technical operation rules of seedling cultivation, timely ventilate the seedlings and prevent burning of seedlings. For the high temperature heat damage during the flowering and filling stages of the heading, one is to adjust from the maturity stage of the variety to avoid the high temperature hazard period of the heading stage of the rice. The second is to use cooling water and daily irrigation nights in the presence of high temperature. Third, spraying some substances that have protective effects on rice chlorophyll, such as vitamin C and auxin, also have a certain effect on reducing the danger of high temperature.