1. Pouring water and wheat yellow water to increase the relative humidity in wheat fields and reduce the temperature between plants is an effective measure to prevent dry hot air. Generally, when the water holding capacity in the field is less than 65% to 75%, the grouting water should be poured at the initial stage of grouting, and the gluten water should be poured during the milk ripening period to the wax ripening stage. 2. In the wheat flowering and grain filling stage, the oil boosting agent with an effective composition of 40% is diluted with water and diluted to 800-1000 times, that is, 50 grams of petroleum auxiliaries are brewed with water of 40-50 kilograms each time every 667 square meters ( 1 mu) spray 50-60 kg, spray twice. 4. With the concentration of 10% to 20% of the plant ash, that is, 5 to 10 kilograms of ash and water 50 kilograms, fully stirred precipitation, take the supernatant solution, spray 50 kilograms per 667 square meters. 5. First use a small amount of warm water to dissolve the borax and prepare a 0.1% solution, that is 50 grams of borax to 50 kilograms of water. Spray from the booting stage to the grain filling stage. It is best to spray at the flowering stage, and usually spray 1 to 2 times.
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3. In wheat heading, flowering and grain filling stage, potassium dihydrogen phosphate solution with a concentration of 0.2% to 0.4%, that is, 100 to 400 grams of potassium dihydrogen phosphate is mixed with 50 kilograms of water, spraying 50 to 75 times per 667 square meters. In kilograms, it is best to spray 3 times. 
How to prevent dry hot wind of wheat