After the rapeseed returns to the green, it will be cold and cold.

The weather in spring is changeable, and the winter rapeseed production area is prone to cold spring. The occurrence time is generally in the rape bud period. The freezing cold damage causes the bud stem to freeze or freeze. The lower the temperature, the longer the duration, the more serious the damage, which can cause Reduce production by 30 to 50%.

The method of prevention is to pay attention to listening to weather forecasts and prevent them early. Use the method of smoked on the ground, sprayed with urea solution or potassium dihydrogen phosphate solution (1000 times liquid) or foliar spray water to prevent and reduce the degree of frost damage; the remedial measures after freezing damage are timely fertilizer and watering, and promote growth. At the same time, strengthen the prevention and control of pests and diseases and reduce losses.