Remedial measures after wheat freeze damage

After wheat freeze damage occurs, corresponding remedial measures need to be carried out according to the specific situation. First of all, suppressive management can be carried out during the vigorous growth period of wheat. You can spread an appropriate amount of quicklime in the flourishing seedling fields to disinfect and sterilize the soil and increase the organic fertilizer in the soil. After the new year, nitrogen fertilizers need to be applied in time. Remedies should be made as soon as possible in early spring. Apply pesticides to promote the greening of wheat seedlings, and then pay attention to water and fertilizer management in the later period.

Since the growth period of wheat seedlings is generally concentrated in spring, that is, March and April of the next year, if there is frost damage during this period, it needs to be remedied in time.

Causes of freezing damage to winter wheat

1. Sudden cooling

After wheat is sown, the temperature is high and lasts until around the beginning of winter. Then there is a sudden drop in temperature, such as snowfall, rain, etc. Since wheat has not experienced cold temperatures after sowing, it is easy to cause frost damage after direct cooling.

2. Long-term cold wave and low-temperature weather

This situation directly involves long-term low-temperature weather, and there are not many sunny days with high temperatures. This causes the wheat seedlings above ground to wither and die, causing frost damage.

3. Late Spring Cold

After the New Year, the temperature began to gradually warm up. However, when a cold wave suddenly occurs, the wheat's ability to withstand severe cold is reduced, and large areas of frost damage will occur, resulting in dead seedlings.

Remedial measures after wheat freeze damage

Suppressing vigorous seedlings

Now is the best time to suppress vigorous seedlings. Spread quicklime in the seedling field.

Lime is hygroscopic and has the functions of disinfecting, sterilizing and preventing insects in the soil. But it also has a benefit that few people know. It increases the available nitrogen in the soil and increases the release of organic phosphorus. It can also be sprayed with foliar fertilizer.

Remedy after the new year

1. Timely top-dressing of nitrogen fertilizers to promote rapid growth of small tillers

Wheat fields where the main stems and large tillers have been frozen to death During the regreening and jointing stage, apply joint fertilizer in combination with watering, and apply 10-15 kg/acre of urea.

2. Application of pesticides for greening

Generally, in frozen wheat fields, only the leaves are frozen and withered without dead tillers. In early spring, remedial pesticides should be applied as soon as possible to promote the greening of wheat seedlings, such as spraying diphosphate Potassium hydrogen + brassinolide. Topdressing and watering during the rising period will increase the tillering rate.

3. Strengthen fertilizer and water management in the middle and later stages to prevent premature aging

Because the plants consume more nutrients in frozen wheat fields, premature aging is prone to occur in the later stages.

Based on the first top dressing in spring, the growth and development status of the wheat seedlings will be observed, and an appropriate amount of foliar top dressing should be applied during the jointing stage or flag raising stage according to the needs of the wheat seedlings.

This can promote larger ears and more grains, increase grain weight, strive to minimize frost damage losses, and increase wheat yields that year.

Measures to prevent frost damage to wheat

The most effective way to prevent frost damage to wheat is to pour freezing water. Watering once before overwintering can prevent frost damage.

After watering, the ground temperature will increase, and it can promote the development of the root system and increase the vitality of wheat. Generally, fields with weak growth can be watered early, and fields with strong growth can be watered later. In addition, if the soil moisture is always very good, you can choose not to water it.