1. What are the benefits of winter irrigation? Winter irrigation of wheat in a timely manner, firstly, it can stabilize the ground temperature and prevent the dead seedlings from freezing damage; secondly, it can solidify the soil, smash up the rubble and eliminate the overwintering pests; thirdly, the combination of winter water and fertilizer can create good conditions for the next spring wheat greening and root growth. In addition, winter irrigation of wheat fields in saline-alkali land can also be pressed to improve soil. According to the survey, the number of ears per mu increased by 123,000 ears per mu, the grain number per spike increased by 6.7 grains, the weight per thousand grain increased by 1.3 grams, and the yield increased by 27%.
Second, what kind of wheat field should be winter irrigation. Whether wheat needs winter irrigation depends on the moisture content. All wheat fields with a water holding capacity of less than 80% and watering conditions before winter should be irrigated; In wheat fields, winter irrigation is more suitable. Generally, weak seedlings, especially single seedlings that are sown late, are best not to use winter irrigation, otherwise freezing damage will easily occur.
3. When is the best time for winter irrigation? The appropriate time for winter irrigation of wheat generally starts when the average daily temperature drops to 7-8 ℃ and ends at about 5 ℃; the farmer's experience is: "The night freezes during the day and the winter irrigation is just right." The winter irrigation is too early, the temperature is high, the evaporation is large, and the desired effect is not received; the winter irrigation is too late, the soil freezes, the water cannot infiltrate in time, the ground water freezes, and the wheat seedlings are easily suffocated under the ice layer, or form Ice icing, lifting the soil, pulling off the roots of the wheat, and hanging the young wheat. The order of winter irrigation is generally to first irrigate clay land with low water permeability and low-lying land, and then to irrigate sandy land with strong water permeability; first to irrigate the second and third types of wheat fields with insufficient bottom moisture or poor surface moisture, then to irrigate the soil with better moisture and more seed Early, and there is a booming wheat field.
4. What is the amount of winter irrigation? Winter irrigation of wheat should not be too large, generally 50-60 cubic meters per acre. In order to save water, it is necessary to make a set of canal borders to prevent flooding.
5. How to manage after winter irrigation. After winter irrigation, wheat should be hoeed loose soil, bridging the cracks, so as to protect the moisture and increase the temperature, to prevent the wind from damaging the roots to cause dead seedlings. (Kaizhong)
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