Variety traits

Cold tolerance of rice

Oryza sativa L.

Cold tolerance of rice defines the crop's ability to germinate and develop fully at temperatures below the optimum. Key indicators are the viability thresholds during phenological phases, where the critical limit for flowering is 14–15°C, and for ripening is 17–18°C.

In the reference 5 varieties crop Rice, where this is mentioned in the description.

Evaluation of rice cold tolerance is based on the analysis of seed sowing quality and seedling growth intensity at reduced temperatures, often tested at the 14°C mark. Laboratory methods aim to identify germination capacity under low soil, air, and water temperature conditions, while field methods assess the impact of temperature fluctuations on stand density and productivity in a natural environment.

Minimum temperature thresholds for rice development are strictly limited: seed germination is possible at 10–12°C, but emergence requires at least 14–15°C. Leaves begin to deteriorate when the temperature drops below 13–15°C. The flowering phase is the most sensitive, as cooling below 14–15°C leads to spikelet sterility and empty grains, while frosts of 0.5°C and below are lethal to the plants.

General information about the subject — on the page Cold tolerance.

Sources6

Varieties of Rice mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.