In the jointing stage of wheat, mild frost damage is likely to occur when the temperature is below minus 1.5 degrees Celsius, and severe frost damage occurs at low temperatures of minus 3.5 degrees Celsius; at the booting stage 10 days after jointing, it is prone to severe frost damage below minus 1.5 degrees Celsius. Wheat encounters the cold in spring, the damaged leaves gradually turn yellow and dry, the main stem and the young ears of large tillers lose water and wilt, appear white and flat, and die from freezing. In addition, *** malformed ears appeared, and the number of grains per ear was significantly reduced. So, how to prevent it? 1. Irrigate before cooling down. The increase of water content after irrigation enhances the thermal conductivity of the soil, and the increase of the air humidity near the ground forms frost or fog. When condensation occurs, the latent heat of condensation can be released, and the temperature of the leaf surface increases, thereby avoiding or reducing frost damage. 2. Increase the application of organic fertilizers, improve soil fertility, and improve the quality of land preparation. Formulated balanced fertilization and increased application of organic fertilizers are the basis for improving soil fertility and ensuring good development of wheat. 3. Wheat seedlings control prosperity. Before the disaster, measures such as suppression and control of prosperity and deep cultivation and control of prosperity can reduce the freezing rate. Remedy 1. Watering to prevent freezing. Pay close attention to changes in weather and fill water before cooling down. But when frost comes, do not water. 2. Wheat field coverage. Before cooling down, 250 kilograms of wheat bran per mu, or 2500 to 3000 kilograms of decomposed organic fertilizer, are evenly spread around the wheat rhizosphere. 3. Apply fertilizer in time. Topdressing quick-acting fertilizers on wheat fields that have suffered freezing damage. Generally, topdressing urea is about 10 kg per mu. 4. Plan to protect moisture and increase temperature. Hoeing, water storage and temperature increase can make up for the loss of the main stem. 5. Spray plant growth regulators. After the wheat is frozen, timely spraying "Tianda 2116" and other plant growth regulators can increase the yield of wheat. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone FOSHAN PHARMA CO., LTD. , https://www.pharmainjection.com