1, due to seedlings and fertilization: For winter frozen wheat fields, should return to the green period, the use of good moisture conditions, the soil back to the favorable timing of the slurry, chase 10-15 kg of urea per acre, promote the occurrence of tillers and aphid into a panicle. In the early spring, it is also necessary to draw a dragonfly early to increase the temperature of the soil and promote the development of wheat seedlings. Winter frozen wheat fields should be classified management. Freeze lightly damaged light wheat fields to promote temperature increase, generate new roots and then water; freeze-damaged wheat fields can be watered and fertilized early to prevent the death of juvenile ear dehydration. Young ears have been frozen in wheat fields and should be treated with available nitrogen fertilizer, 10-13 kg of ammonium per acre or 20-30 kg of ammonium bicarbonate, combined with watering, cultivating loose soil, prompting frozen wheat seedlings to resume growth as soon as possible.
2. Clearing up the gully: To reduce the groundwater level, pay attention to the conservation of the root system and enhance its absorption capacity so as to ensure the recovery of leaves and the occurrence of new tillers and the nutrients needed to form the ear.
3. Fertilizer and water management in the middle and later stages: As the frozen wheat consumes more nutrients, it is prone to premature senescence in the later period. Based on the top-dressing in the spring, the growth and development status of the wheat seedlings should be reviewed, and appropriate fertilizers should be applied during jointing or flag-raising periods. Potassium dihydrogen phosphate foliar spray fertilizer is used to promote large grains and large grains and increase grain weight.
4, to strengthen the prevention of pests and diseases: wheat after freezing damage, their own growth is weak, disease resistance, susceptible to bacteria infection, at any time according to the plant protection department reported that the chemical control.
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