The reason why wheat topdressing is due to seedlings should be scientific and fertilizer and water management should be conducted scientifically.
1. For wheat fields with normal growth and high fertility levels, combine the watering and replanting joint fertilizers at the jointing stage.
2, for medium fertility wheat, can be combined with watering topdressing quick fertilizer, and spraying a new high-fat film to increase the efficiency of chemical fertilizer inefficient components.
3. For the three types of wheat seedlings with poor dry growth, they should be topdressed twice in the returning green period and the jointing stage on the basis of early spring breeding, and spraying strong thallus to promote spring oysters to form spikes and improve the rate of success. And promote the development of small flowers, increase the number of grains per ear;
4. For late seedlings that are not applied with base fertilizer or with low fertilization when sowing, they should be topdressed when the soil is thawed. However, it should not be poured back to prevent the ground temperature from declining and the soil permeability is poor, which affects the growth of wheat plants. Can be based on the fine plan, in the early stages of wheat to carry out the promotion of fertilizer and water, topdressing about 10 kg of urea per acre is appropriate. Watering should be carried out when the average ground temperature is stable at about 5°C so as to avoid freezing damage caused by watering prematurely. At the same time spray a new high-fat membrane, can prevent moisture evaporation, sun drought, thermal insulation, anti-soil compaction.
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