Winter irrigation of wheat has many benefits.

What are the benefits of winter irrigation

Timely winter irrigation of wheat can stabilize ground temperature and prevent freezing damage to seedlings; second, it can settle soil, crush bumps, and eliminate overwintering pests; third, the combination of winter water and winter fertilizer can create good conditions for wheat turning green and root growth in the next spring. In addition, winter irrigation of wheat fields in saline-alkali land can also improve the soil by pressing alkali. According to the investigation, compared with the wheat field without winter irrigation, the number of ears per mu increased by 123000 ears, the number of grains per spike increased by 6.7, the 1000-grain weight increased by 1.3g, and the yield increased by 27%.

2. What kind of wheat field needs winter irrigation

Whether wheat needs winter irrigation, first, it depends on soil moisture, winter irrigation should be carried out in all wheat fields where the field capacity is less than 80% before winter and there are watering conditions; second, it depends on the seedling situation, winter irrigation is more suitable for wheat fields with more than 1.5-2 tillers per plant, and winter irrigation is more suitable for general weak seedlings, especially single seedlings sown late, it is best not to winter irrigation, otherwise it is easy to cause freezing injury.

When will the winter irrigation be ready?

The suitable time for winter irrigation of wheat generally begins when the daily average temperature drops to 7 ℃ ~ 8 ℃ and ends at about 5 ℃. The experience of farmers is: "winter irrigation is just right when the night freezes away." Winter irrigation is too early, high temperature, large evaporation, can not get the desired effect; winter irrigation is too late, soil freezing, water can not seep in time, ground water freezes, wheat seedlings are easy to suffocate to death under the ice, or form ice, lift soil clods, break wheat roots, and hang wheat seedlings. Generally speaking, the order of winter irrigation is to irrigate clayey land and low-lying land with poor water permeability first, and then to irrigate sandy land with strong water permeability; to irrigate the second or third types of wheat fields with insufficient or poor soil moisture, and then to irrigate the wheat fields with better soil moisture, sowing earlier, and the trend of prosperity and growth.

What is the amount of irrigation in winter?

The amount of winter wheat irrigation should not be too large, generally 50 to 60 cubic meters per mu. In order to save water, canals and beds must be matched to prevent flooding.

5. How to manage after winter irrigation

After winter irrigation, wheat should hoe and loosen the soil in time to close the cracks, so as to preserve soil moisture and increase temperature, and prevent ventilation from injuring roots and causing dead seedlings.