Wheat topdressing should be based on the conditions of seedlings, scientific management of fertilizer and water.

 

1. For wheat fields with normal growth and high fertility levels, joint fertilizer should be applied in conjunction with watering at jointing stage.

 

2. For medium-fertilized wheat fields, quick-acting fertilizers can be applied in combination with watering in the rising period, and new high-fat membranes can be sprayed to increase the utilization rate of chemical fertilizers.

 

3. For the three types of wheat seedlings with poor dry growth, on the basis of early spring slashing, topdressing should be carried out twice in the regreening stage and the jointing stage, and the spleen sapling should be sprayed to promote the spring stalks and increase the ear formation rate. And promote the development of small flowers and increase the number of grains per ear;

 

4. For late seedlings that have not been applied at the time of sowing or have a small amount of fertilizer, they should be used for topdressing when the soil is just frozen, but it is not suitable to pour back to Qingshui, so as to avoid the decrease of ground temperature and poor soil permeability, which will affect the growth of wheat plants. On the basis of fine slashing, fertilizer and water promotion can be carried out in the early stage of wheat getting up, and it is better to apply about 10 kg of urea per acre . Watering should be carried out when the average ground temperature is stable at around 5 °C, so as to prevent freezing damage from premature watering. At the same time, spraying a new high-fat film can prevent moisture from evaporating, sun-proof and drought-resistant, heat-preserving and anti-freezing, and anti-soil layering.