Question

What is the specific temperature range required for the healthy growth of rice (paddy)?

• A. 15 - 20 degrees Celsius
• B. 25 - 35 degrees Celsius
• C. 20 - 27 degrees Celsius
• D. 30 - 40 degrees Celsius

Answer 1

Answer:

C. 20 - 27 degrees Celsius

Rice Cultivation Temperature

• Rice (Oryza sativa) is a warm-season crop that thrives within a specific temperature range for optimal growth and yield.

• The ideal temperature range for the healthy growth of paddy (rice) is between 20°C and 27°C (68°F to 80.6°F).

• Temperatures below 15°C (59°F) can significantly hinder germination and seedling development, and prolonged exposure to cold can be detrimental.

• While rice can tolerate high temperatures, extremes above 35°C (95°F), especially during the flowering stage, can lead to sterility of pollen and reduced grain filling, thus negatively impacting the final yield.

• Different varieties of rice have slightly varying temperature tolerances, with some adapted to cooler or warmer conditions. However, the 20-27°C range is generally considered the most conducive for most cultivated varieties.

• Factors influencing temperature needs:

  • Germination: Requires temperatures around 20-30°C.

  • Tillering: Best at 20-26°C.

  • Flowering and Grain Filling: Crucial stages where temperatures between 23-27°C are optimal for successful reproduction and starch accumulation.

• India, being a major rice-producing country, experiences diverse climatic conditions. The major rice-growing seasons are Kharif (monsoon season, typically June-October) and Rabi (winter season, typically November-April). The temperature during these periods plays a vital role in determining the success of the rice crop.