How should farmers seize the "cold tail and warm head" weather and seize the sunny day to sow?

In agriculture, we should pay attention to moisture conservation to meet the water supply in key periods such as wheat scion, filling, rape lichen and flowering. At this time, the spring sowing work in towns and villages in some areas has begun. In order to prevent it from being cold and hot, we should pay attention to the weather of "cold tail and warm head", and strive to sow the whole seedling in sunny days. The management of tomato seedlings, eggplant seedlings and pepper seedlings should be done well when raising seedlings.

The main management measures are: in cold weather, it is necessary to strengthen anti-freezing and warmth, pay attention to ventilation, and prevent seedlings from being stuffy; Properly control fertilizer and water to prevent seedlings from growing white, but not too much, otherwise it will affect the growth of seedlings and appear thin, small and yellow seedlings; The garbage, silt, feces and human feces in seedbeds and nutrient bowls should be fully decomposed, otherwise it will infect diseases or attract pests or burn the roots of seedlings at high temperature. Don't use immature chemical fertilizer and farmyard manure in seedbed fertilization, pay special attention to the concentration when using chemical fertilizer, and don't apply it excessively.

In spring, the weather is changeable and cold air activities are frequent. It is necessary to do a good job of "cold tail and warm head", sow in time to avoid rotten seedlings, and pay attention to meteorological problems when sowing in spring. Grasping "cold tail and warm head" means catching cold tail buds and warming heads. After 4-6 days, make full use of cold air and sow seedlings at one time. How to grasp the "cold tail and warm head" weather? According to the medium and long-term weather forecast issued by the meteorological department, that is, combining the local and current weather conditions (sky conditions, cloud and day characteristics, temperature, pressure, wind and other meteorological elements) and their changes. The weather characteristics of "cold tail" are: after the invasion of cold air, the weather is still rainy. Once the rainy weather gradually stops, the clouds rise and become thinner, the temperature turns from falling to rising, the air pressure gradually decreases from high, and the north wind turns from strong to weak.

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