Wheat winter dead seedling prevention method

Doing irrigation at seedling stage: For the early sowing wheat fields with insufficient soil moisture, it can be watered during the tillering period. If the soil fertility is insufficient, a small amount of chemical fertilizers can be topdressed to promote early-onset seedlings for safe wintering. For the management of late-seeding wheat fields, the soil temperature should be increased and the soil moisture should be maintained. The cultivator can use cultivating loose soil and watering should not be carried out during the seedling stage. Otherwise, the ground temperature will be lowered and the situation will be affected.

Timely and appropriate amount of winter irrigation: timely winter irrigation of winter wheat, one can stabilize ground temperature, form a good soil moisture environment, adjust the soil nutrients in the plough layer, increase the heat capacity of the soil, promote plant rooting and more tillers, grow strong seedlings. Second, winter irrigation is not only conducive to preventing freezing and dead seedlings and wintering and protecting seedlings, but also can mitigate the adverse effects of cold damage, drought damage and severe temperature changes in early spring, and is also an important measure to prevent the death of wheat in winter and spring. The third is to sink the soil and eliminate overwintering pests. The fourth is the combination of winter water and winter fertilizer, which can create favorable conditions for the return of spring wheat and root growth, improve production speed, improve quality and increase yield. In addition, the saline-alkali wheat fields can be fed in winter and can also be alkali-modified. According to the survey, compared with winter wheat without winter irrigation, winter irrigation increased the number of ears per mu by 123,000 spikes, grain number per spike by 6.7 grains, and grain weight by 1.3 grams, which increased the yield by 27%.

Timely repression: Repression can crush the soil mass, crack cracks, and practicable soil, so that the roots of wheat and soil can be tightly combined to promote root development. In addition, repression also has the function of lifting and protecting.

Appropriate coverage: Cover sand with wheat in the winter, cover soil with wheat, can deepen the soil depth of the tiller section and protect the leaves of the near ground, reduce the evaporation of soil moisture, improve the water condition at the tiller section, and play the role of insulation and freezing protection. Generally, the cover soil 1 ~2 cm thick can play a good antifreeze seedling effect. The soil covering the wheat fields should be cleared and ridged in the spring, and the soil should be cleared out of the fields when the temperature reaches 5°C. For varieties with poor cold resistance, wheat fields that are shallow and poorly ploughed should be covered early. Overwintering film coverage can increase the temperature and ensure soil moisture, effectively prevent freezing damage, promote plant growth, thereby increasing the plant tiller and promote its development into a large plant, and improve the rate of tillering and spike formation. Cover film time is appropriate when the temperature drops to 3°C. It is easy to cover long before the cover is covered, and the leaves are susceptible to freezing when covered. Late sowing can be filmed immediately after sowing.

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