1. Apply strong tiller fertilizer to promote the weak and strong. For wheat fields where the amount of base fertilizer is insufficient, the seedling fertilizer is not applied in time, and the population is too small and has been defertilized and yellowed, apply 10-15 kg of ternary high-efficiency compound fertilizer as soon as possible after turning green to promote the growth of weak seedlings and early spring in spring. Increase the rate of tillering into ears. For wheat fields with a large amount of straw returned to the field, such as the yellowing of wheat seedlings, quick-acting compound fertilizer should be applied as soon as possible, and urea should be added to promote the transformation of rigid seedlings. For the late-sown single-stalk wheat that is still one leaf, as long as the basic seedlings are sufficient (about 250,000 per mu), the amount of nitrogen applied to the seedlings should be controlled and jointing fertilizers should be reapplied. For wheat fields with weak late sowing seedlings and few basic seedlings, quick-acting compound fertilizer or nitrogen fertilizer should be used as soon as possible to promote the transformation of seedling conditions.

2. Reapply jointing fertilizer to strengthen stalks and ears. In large-area production, the focus of spring management is to apply jointing fertilizer, to the first- and second-class seedling wheat fields with a suitable number of stems and tillers, when the leaf color is normal and the plant base is close to the fixed length, the jointing fertilizer is applied. Conducive to the cultivation of strong stalks and large ears, generally 7-10 kg each of urea and ternary compound fertilizer per mu. For wheat fields where the population is too large and the leaf color is not fading normally, the application of jointing fertilizer should be postponed appropriately to ensure that the leaf color does not fade without applying fertilizer to prevent lodging. For the three types of seedlings with too small populations and insufficient number of ears, and wheat fields with severe defertilization and yellowing, jointing fertilizer can be applied early.

3. Clear ditch and drain moisture to prevent stains. Before wheat jointing, for wheat fields that have not been well drained, the three ditches in the wheat field should be opened in time on sunny days, and the ditching soil should be evenly dispersed without damaging the wheat seedlings. The ditched wheat field has partially collapsed. It should be dredged in time to ensure unblocked drainage. It is necessary to stop the rain from drying out and the ditch is free of water. The three ditches outside the wheat field should also be unblocked to effectively reduce the occurrence of secondary roots in spring. Soil water content promotes the occurrence of secondary roots in spring, creating conditions for later grain and weight gain. For the yellow sage seedlings with waterlogging, the jointing fertilizer should be applied in advance and the application amount of ternary compound fertilizer should be increased appropriately to promote the transformation of seedling condition.

4. Prevent frost damage and remedy early. Early spring climate change, low temperature cold wave, spring frost damage occur from time to time, especially from mid-to-late March to early and mid-April. Cold waves often go south in the north. At this time, if the temperature drops below 0℃, it lasts for 6-7 When it is small, the jointed wheat seedlings will suffer freezing damage. The wheat fields where the young ears of the plants develop to the stage of pistil and stamen differentiation to the booting stage are the most vulnerable to freezing. The later the occurrence of freezing damage, the greater the impact on yield. After the spring freezing injury of wheat occurs, one is to investigate the degree of freezing of young ears 2-3 days after the occurrence of low temperature; the other is to timely apply restoration fertilizer to the wheat field where the death rate of stems and tillers exceeds 10%. Generally, the mortality rate of stalks and tillers in wheat fields is 10%-30%, and 4-5 kg of urea per mu is applied. For every 10% increase in the mortality of stalks and tillers of wheat fields over 30%, 2-3 kg of urea must be increased. The limit should not exceed 15 kilograms. It is possible to fight for the lightly frozen tillers and the later high tillers to form ears to reduce yield loss.

5. Prevention of diseases and insects, chemical weeding. Focus on strengthening the forecast and control of diseases and insect pests such as powdery mildew, head blight, sheath blight and rust. For the plots that were not chemically weeded last winter, chemical weeding in spring is particularly important. Chemical weeding should be carried out in time to control weed hazards according to the types of weeds. At the same time, for wheat fields that are too large and are at risk of lodging, they should be suppressed or controlled in a timely manner to prevent them from falling.