Wheat watering frozen water notes

The first is to ensure that there is a suitable water supply for winter wheat, which helps to consolidate tillering before winter and promote new births; Second, it has the function of using spring water in winter, which is conducive to maintaining good sensation in early spring and delaying the first time of spring water in spring. To strive for management initiative and strong seedling formation; Third, to accelerate crop rot decay, most of the current wheat planting has used the direct return of corn stalk technology, straw in the decay process requires a certain amount of water, moisture is conducive to the rot of the straw. At the same time promote microbial activity, accelerate the decomposition and transformation of fertilizer nutrients, provide more nutrients for the growth and development of wheat after the year; Fourth, improve the thermal conductivity of the soil, can effectively reduce the temperature range of the field, to prevent freezing and chilling due to sudden temperature rise and fall Fifth, it is possible to collapse the soil, freezing and thawing weathered ash, make up for cracks, eradicate overwintering pests, and facilitate dishing and splitting. Sixthly, it is used to maintain alkalinity and reduce salinization in soil.

The following points should be noted when watering frozen wheat:

1. Reasonably determine the time for irrigating frozen water. The watering time is most suitable when "night freezing and depleting" is used. Generally, before and after "small snow" in late November, the daily average temperature starts at 7 to 8°C, and ends at about 4 to 5°C. Premature air temperature is too high to evaporate, and evaporation does not play a role in heat preservation and growth. In wheat fields with good growth, wheat seedlings will grow due to sufficient water and fertilizer, which will cause severe jointing before winter and will cause freezing damage. Watering is too late. The temperature is low, the water is not easy to infiltrate, the formation of water, the surface of the frozen, after winter irrigation, the plants are susceptible to freezing damage. In the day should choose to be carried out after 9 am to 4 pm, the amount of irrigation should not be too large, in order to be able to see through the end of the day is appropriate, should not flood irrigation, land area of ​​water, form a frozen layer. After being poured, they should be repressed and scratched in time to prevent cracks on the ground, which will cause damage to the roots and cause dead seedlings.

2, watering frozen water to see the situation, see the seedlings. In order for wheat to be in a suitable soil moisture content when returning green, generally the soil moisture content is insufficient, the soil moisture content of the cultivated layer is less than 16%, the loam soil moisture content is less than 18%, and the clay ground is less than 20%. Above the above indicators, soil moisture is better and can be slow or no irrigation. For weaker seedlings with few leaves, few roots, and few tillers or tillers, especially for late-seeding seedlings, it is not appropriate to carry out winter irrigation. For wheat fields with large populations and strong growth, if wintering is good, winter or winter irrigation may be delayed. A wheat field with a good bottom and sufficient fertilizer can be poured over winter water.

3, irrigation should be appropriate. Winter irrigation time in the morning irrigation, seeping before entering the night is appropriate. General irrigation volume of 45-50 cubic meters per mu, irrigation water should not be too large. For fertility-deficit wheat fields, winter irrigation can be combined with topdressing. Winter irrigation per acre supplement urea 5-8 kg. After watering, it is necessary to carry out plan maintenance in time to increase the temperature of the ground to prevent cracks and cracks in the plate, so as to ensure safe winter wheat.

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