Apply nitrogen fertilizer in time to promote the growth of small tillers. If the main stems and large tillers have been frozen to death in wheat fields, the topdressing should be divided into two times. Apply quick-acting nitrogen fertilizer after thawing for the first time in the field, apply 10 kg of urea per mu, and apply it in furrows to improve fertilizer efficiency; apply quick-acting fertilizer to water when the average daily temperature is above 0 ℃ Water 20 cubic meters in the last acre to promote fertilizer dissolution and plant absorption. The amount of water should be infiltrated into the ground on the same day; phosphorus can promote the growth of tillers and roots. Phosphorus-deficient plots can be mixed with urea and diammonium phosphate. In the second jointing stage of wheat, combined with watering and fertilization, 10 kg of urea per mu was used. Generally, in wheat fields affected by freezing, only the leaves are withered and there is no dead tiller. You can hoe in early spring to increase the ground temperature to promote the greening of the wheat seedlings, and top-dressing and watering during the rising period to increase the tiller rate.
Strengthen the management of fertilizer and water in the middle and late stages to prevent premature senescence. As the plants consume more nutrients, premature senescence is prone to occur in the later period. Based on the first topdressing in spring, the growth and development of the wheat seedlings should be looked at. Appropriate top dressing in flag period can promote large ears and more grains and increase grain weight.
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