Under the influence of the rainy wetland and the late maturity of the corn before the sowing, the wheat can be planted later than the perennial sowing, and even the wheat is frosted. The wheat seedlings in the winter are generally weak and small, and the wheat field problems are prominent and the seedlings are complicated. The wheat seedlings are weak, the nutrient accumulation in the body is small, the cold resistance and frost resistance are weak, and the winter and spring are vulnerable to freezing damage. Therefore, due to the appropriate conditions for seedlings and timely follow-up, it is indeed necessary to take effective and comprehensive measures to strengthen the management of wheat fields before winter and winter sowing to ensure that winter wheat is safely wintered.
Prevention and control of pre-winter pests and diseases The late-sown wheat has many basic seedlings, high density, late development, and is vulnerable to pests and diseases. In the seedling stage, pests such as root diseases, underground pests and autumn locusts were found, especially those that were not selected with coated seeds or chemical dressings or soil treatment. It is necessary to take timely control measures such as toxic soil, root irrigation and spraying. Wheat field removal can be carried out in the fall or early spring. It advocates chemical weeding in autumn, with good effect and high safety. It is implemented in sunny days with wheat 3-5 leaf stage, weed 2-4 leaf stage and daily average temperature above 5 °C.
Early wintering and light watering are the most effective methods for ploughing the soil after the straw is returned to the field. The wintering water of the straw returning field is moved to the 3rd leaf stage, and the night is frozen before the end of the night. The annual acreage is 30-40 square meters. Special attention: late seeding of weak seedlings, especially wheat sown after frost, generally not dry or winter, so as not to reduce the ground temperature, affecting seedlings.
Strengthening the fertility characteristics of field tillage management and late sowing wheat: the growth period before winter is short, and the accumulated temperature is small. The performance is “one small three, one light and one lightâ€. The seedlings are small, the leaves are few, the secondary roots are few, the tillers do not occur or occur less, and the plants are dry. Fresh matter is light. The main factor affecting the early growth of wheat is the ground temperature. Therefore, in management, the principle of keeping warm and warming should be promoted. The last time before freezing or raking, you should pay attention to the roots of the earthworms, or cover the "heads of manure" to protect the wheat seedlings from winter. It is strictly forbidden to graze indigo in the wheat field in the winter.
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