Wheat winter irrigation is an important measure to prevent winter wheat from freezing and killing seedlings, and to save water for the next year, to ensure winter water use, to prevent freezing in early spring, to prevent drought, to eliminate winter pests, to ensure safe wintering of wheat, and to increase wheat yield. There are a few things to keep in mind during winter irrigation:
1. Winter irrigation plots. Winter wheat irrigation must be carried out on straw returning, rotary tillage, soil vacancy, poor soil quality and lack of soil. To soil the soil, crush the slag, prevent cold winds from blowing, promote the development of wheat roots and cockroaches, and keep the seedlings safe for winter. . For weak seedlings with poor soil fertility, insufficient fertilization, small population, and poor growth, the wintering water can be poured early in the second half of November, combined with watering and topdressing to promote growth; for large and long-growing wheat fields, such as lyrical Can delay winter irrigation or winter irrigation. Winter wheat with good bottom and sufficient bottom fertilizer is not used for winter irrigation.
2, winter irrigation time. Winter irrigation should be timely, irrigation is too early, the temperature is high, the evaporation is large, too much loss in winter, the winter irrigation should not be effective, the winter irrigation is too late, the temperature is too low, the ground has been frozen, the water is not easy to infiltrate, the area When the water freezes, the wheat seedlings are easy to die under the ice layer, or form an ice ridge, lift the clods, pull off the wheat roots, and hang the wheat seedlings. Generally, the average daily temperature is about 3 °C, and it ends before freezing. The specific implementation depends on the climate change and the soil conditions are flexible. The experience of the masses is “not freezing, winter irrigation is too early; only freezing is not done, winter irrigation is late; night freezing is eliminated, winter irrigation is just right. It should be completed before the wheat field is frozen. Winter irrigation, reaching the night freeze, the pouring is just right.
3. Winter irrigation method. Choose from 9:00 am to 5:00 pm every day (try to choose the morning in the morning). The amount of water should not be too large, but it should be poured. It is better to infiltrate into the soil on the day after irrigation. Avoid flooding the ground to prevent ground. Sedimentary water icing; for wheat fields that have no application of base fertilizer or insufficient base fertilizer, small population, and weak growth of wheat seedlings, 8-10 kg of urea per acre or 20-25 kg of ammonium bicarbonate should be applied in combination with pouring winter water. For the wheat field with sufficient base fertilizer, suitable group and normal growth, no top dressing is needed before winter; after watering, it should be timely cut, the knot is broken, and the temperature is increased.
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