Increasing application of phosphorus and potassium fertilizer in low temperature and rainy weather to enhance cold resistance of crops

According to the forecast of the County Meteorological Observatory, from November 15 to 21, there were continuous low-temperature and rainy weather in our county. The average daily temperature was only about 10 °C, and the minimum temperature would drop below 5 °C. The process rainfall was obvious, with moderate to heavy rain. Qi Qisheng, director of the County Agricultural Technology Station, said that such a climate is extremely unfavorable to agricultural production. Crops may cause waterlogging and freezing damage. It is hoped that farmers will strengthen field management, implement disaster prevention measures, and mitigate disaster losses.

It is necessary to drain the ditch in time to prevent waterlogging. The crops planted in the autumn and winter seasons of our county are all dry crops with poor resistance to waterlogging and sorghum. If the soil is flooded or the soil moisture is saturated for a long time, the crop will wither and die. Therefore, it is necessary to strengthen the ditch drainage work, reduce the soil water content, promote soil ventilation, and prevent crops from rot or dead seedlings.

It is necessary to implement insulation measures to prevent freezing damage. Greenhouse vegetables, melons and fruits (such as tomatoes, red eggplants, watermelons) are warm-warming crops. When the temperature drops below 10 °C, it will stop growing. Over time, there will be freezing damage or dead seedlings. At present, it is the stage of seedling cultivation of vegetables and fruits in greenhouses, covering plastic film, straw and other coverings to prevent freezing damage.

It is necessary to increase the phosphorus and potassium fertilizer to enhance the cold resistance of crops. On the basis of soil fertilization, 0.2% potassium dihydrogen phosphate solution can be used for top dressing, foliar application of grass ash, and application of decomposed organic fertilizer at the base of the crop to improve the cold resistance of the crop.