Climate change poses new threats to rice cultivation
Temperature between 18 °C and 34 °C is best for rice yield. If the temperature drops below 18 °C during the panicle stage and 20 °C during the flower stage of rice, the embryo inside the panicle and may not develop properly.
As a result, white, dead, immature shoots are seen immediately after the flower emerges from the rice stalks.
Similarly, if the temperature drops below 20 °C during flowering, rice flowers or panicles may turn white and die. If the temperature goes above 34 °C during the tillering or flowering stage, the rice may become stunted.
Apart from this, the rice can become white due to the injury caused by the shock and the flower in the undesired storm and hail. Cold or heat injuries can cause the fetus to abort.
This can cause the rice stalk to turn partially white and the fetus to die. In these cases, there is no benefit to taking any medicine.
Due to climate change, farmers have to face new problems and challenges in paddy cultivation due to unexpected storms – hailstorms, untimely extreme cold – extreme heat.
The intolerable temperature for rice is 35 °C or more. If the temperature remains at 35 °C for a few hours during the flowering period, it can cause excessive wilting in the paddy field. From the third week of March to April, in South Asia, daytime temperatures can often rise to 35 °C or more.
That’s what farmers need to do –
- By planting enhanced and resilient varieties, we can significantly optimize our crop yields and strengthen their ability to withstand various challenges.
- Sowing disease-free seeds.
- Optimizing fertilizer and irrigation practices for perfect balance.
- Ensuring or keeping water in the paddy fields during its panicle stage and flowering stage.
- Always keep the soil watered.
- Retain 2 to 3 inches of water in the soil for 22 to 25 days from gestation to milk stage. 3/ MOP fertilizer mix 100 grams in 10 liters of water and spray on the land as 5 percent or apply 5 kg of MOP fertilizer per bigha.
- If it is necessary to spray the rice when it is in bloom, spray the herbicide in the late afternoon.
- Rice pollination usually takes place between 7 am and 11 am. Spraying in this condition causes pollination problems and is likely to cause rice weevils. For that, it should be sprayed in the afternoon.
