The benefits of winter irrigation can make the soil increase water storage and prevent drought in the coming spring. In order to have a good winter irrigation effect, three factors must be considered: soil moisture, temperature, and seedlings.
Soil moisture from the aspect of soil moisture, if it is less than 70% of the field capacity (less than 16% of the combined soil, less than 18% of the silt), it will be winter irrigation; if it is higher than 70%, the winter irrigation can be delayed properly or not Winter irrigation, but to strengthen the loose soil, measures to protect the earth, raise the temperature, and 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 water irrigation and mashing. At the same time, it will cause the wheat seedlings to grow in length and not resist freezing. The winter irrigation will be late, the temperature will be low, the soil will freeze, and the water will not infiltrate. The occurrence of Lingtai will cause the wheat seedlings to freeze or suffocate. 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 during the winter season of filling the seedlings are also important conditions for considering whether to perform 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, frozen seedlings, 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.
It should be noted that the amount of winter irrigation should not be too large, so as to avoid the area of ​​water, the formation of ice shells in the case of low temperatures, resulting in frozen plants above the ground, the roots of suffocation, death and production by childbirth. After winter irrigation, loose soil must be cut in time to avoid the occurrence of cracking hazards due to soil compaction. Late sowing must pay special attention. In addition to protecting soil to prevent cracking and aeration of the soil, it can also increase the temperature of the soil and help promote seedling growth.
Winter wheat irrigation can greatly increase the soil moisture, increase the survival rate of wheat seedlings, and finally achieve the effect of increasing production and income. Http://Content/d0b20716-94d1-448b-8d7e-e03bf8bf5979?cType=2
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