Insecticide Shandong YingLang Chemical Co.,Ltd , https://www.sdylhgtrade.com
Five Ways to Prevent High Temperature Heat Damage in Early and Later Rice
To reduce or prevent the risk of high-temperature damage to rice, it's essential to not only use heat-resistant varieties and adjust planting and harvesting times to avoid exposure during hot periods, but also implement additional protective measures. These strategies help ensure better crop resilience and yield under extreme weather conditions.
First, increasing nutrient input can significantly improve plant resistance. Applying urea at a rate of 2 to 2.5 kilograms per acre during the last leaf stage, or using 8 to 10 kilograms of wood ash, can provide essential nutrients. During the heading to heading stage, spraying a mixture of urea and superphosphate on the water surface helps support plant development and stress tolerance.
Second, proper irrigation plays a crucial role in managing field microclimates. Deep watering during high temperatures, followed by nighttime irrigation, helps maintain moisture levels. Watering before 11 a.m. and again between 2 p.m. to 3 p.m. can effectively regulate temperature and humidity. In some cases, spraying 200 to 250 kg of water per acre during midday can lower temperatures by 1 to 2°C and increase humidity by 10 to 15%, creating a more favorable environment for the plants.
Third, sprinkler irrigation is highly effective when temperatures are extremely high. Spraying the field with water can reduce the temperature by over 2°C and increase relative humidity by 10 to 20%, maintaining these effects for up to two hours. This method is particularly beneficial in areas where traditional irrigation may not be sufficient.
Fourth, foliar sprays can enhance plant health. Mixing 100 grams of zinc sulfate or 100 grams of potassium dihydrogen phosphate with 40 to 50 kilograms of water and applying it to the leaves can improve nutrient absorption and strengthen the plant’s ability to withstand heat stress.
Lastly, setting up wind barriers is an important measure for fields located in wind-shielded areas. When hot and dry winds occur during the flowering period, installing windbreaks along the field edges can protect the crops. Wooden stakes placed every 2 to 3 meters, with banners or other materials attached, can create a barrier that reduces wind impact and maintains optimal growing conditions.
By combining these methods, farmers can effectively mitigate the risks associated with high-temperature stress and improve the overall productivity of their rice crops.