Soil moisture from the aspect of soil moisture, if it is less than 70% of the field capacity, it will be winter irrigation; if it is higher than 70%, it can be appropriate to delay the winter irrigation or no winter irrigation, but it is necessary to strengthen the loose soil, measures to ensure soil temperature, Promote the roots of wheat under the bar to cultivate strong seedlings. The suitable temperature for temperature winter irrigation is about 3°C. If the winter irrigation is too early, the temperature is still high, and the evaporation is large, which will not achieve the effect of irrigation and increase of maggots. At the same time, it will cause the wheat seedlings to grow in length and not resist freezing. In winter, the temperature is too low, the soil is frozen, and the water cannot infiltrate. The wheat seedlings were frozen or suffocated. After the winter irrigation, the cold current came and when the temperature dropped below 0°C, the winter irrigation was higher than the ground temperature without winter irrigation, which was greatly beneficial to ensure the safety of winter wheat seedlings.
Seedlings This is an important condition to consider whether winter irrigation. Wang Miao generally does not lack water and fertilizer, do not have winter irrigation. Weak seedlings (especially late-seeding wheat and single-rooted seedlings) are also not suitable for winter irrigation to prevent silt seedlings, freezing injury or even dead seedlings. For such weak seedlings, the winter water can be turned back to Qingshui, and the water can be used to adjust the fertilizer, and the fertilizer can be used to attack the seedlings, so that the wheat seedlings can turn from weak to strong.
Note: The amount of winter irrigation should not be too large, so as to avoid the water in the ground area and form ice shells in case of low temperature, which results in freezing of the plant's ground, suffocation of the roots, and death due to childbirth. Http://Content/85e24b89-cc8b-4d9f-bc25-7a5258f42df5?cType=2
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