As a result of continuous rains from late October to early November last year, continuous droughts from mid-November to the end of December caused the planting of rapeseeds and the sowing time of big wheat to be delayed by 7-10 days compared with previous years. Small wheat seedlings after sowing of small wheat seedlings; seedlings returning green after transplanting the field slowly, seedling growth was blocked, yellow leaflets, imbalance prominent. Now that the “spring is coming†has passed, rape and wheat will enter the vegetative and reproductive growth stage, which is an important period for the formation of yield. Therefore, we must do a good job in field management to promote spring growth, prevent waterlogging, and prevent pests and diseases, so as to lay a solid foundation for the harvest of spring rapeseeds this year.
Ditch drainage to prevent waterlogging. Timely clean up the "three channels" and extra-territory channels in the fields to reduce the groundwater level. At the same time, in combination with Qinggou, digging mud soil in the roots of the crops, pressure grass insulation protection seedlings.
Apply nitrogen fertilizer early to promote growth. Late-planting, late-planting, poorly-growing three types of seedling fields, plant short, small green leaves, to take advantage of the favorable timing of temperature rise after spring, topdressing nitrogen fertilizer and promote growth. Generally, 5 ~ 7.5 kg of urea is applied per mu, roots are promoted, and the speed of growth is accelerated to promote the improvement of the seedlings.
Select counterpart herbicides to control field weeds. Unsealed rape fields and unsealed wheat fields require timely chemical weeding if there are more weeds in the field. For grassy weeds in rapeseed field, use 50 ml of 5% quebrachoxacin (fine quizalofop-p-ethyl) EC per acre, or 50 ml of 5% high-efficiency guaxilien (right dexadecidoxime). 30-40 kg spray control. For broad-leaved grass in rapeseed field, 50% herbicide removal agent 30-40 ml per mu, or 30% grass herbicide 50 ml watered 30-40 kg spray, can also be used in combination with control of grass weed herbicides. To increase weeding effect. Weeds in barley fields are treated with 50% isopropanol 150g per acre and evenly sprayed with water 30-40kg; wheat fields are treated with a 6.9% antimony gel suspension per acre. 50 ml, equilibrate with 430-40 kg even spray.
Scientific fertilization promotes spring hair. The application of the moss fertilizer has an important role in promoting the growth of the plants with a long spring time, a large number of mosses, and a large number of angles. Fertilizer should be rationally applied according to various factors such as the amount of fertilizer applied in the early stage, plant growth, and soil fertility. Normally growing rapeseed field is 3 to 5 cm high when rapeseed is applied with 10 kg of urea per mu. For example, fertile soil, adequate early fertilizer, and high density of the field can be applied later, and the amount of rapeseed should be reduced. Mushi urea 5 ~ 7.5 kg; such as winter before the base fertilizer, Miaofei application less, the poor growth base of the seedlings, leaves up and dull, to apply early re-application of the moss fertilizer, to restore growth, usually urea 12.5 kg per mu . Boron-deficient areas, 100 grams of borax per acre, watered 30 to 40 kg foliar spray to prevent plant lack of boron. Big wheat produces 7.5 to 10 kilograms per acre of Spike.
Grasp the appropriate period to prevent and control pests and diseases. Sclerotinia sclerotiorum is the main disease in rapeseed production in our province. We must take the combination of agricultural control and chemical prevention to prevent and control. During the late period of rapeseed development, the old, yellow and diseased leaves in the lower part of the plant were promptly removed to reduce the number of pathogenic bacteria in the field; in rapeseed blossoms, the final flowering period, 50% carbendazim 100 grams or 50 grams of antifungal mold per acre was used, and watered 30. ~ 40 kg spray. The control of head blight in the heading stage of large wheat, with 50% carbendazim WP 100g or 70% thiophanate-methyl WP 75 grams per acre, watered 30 to 40 kg spray, every 5 to 7 days Spray once more, focus on the ear when spraying, and spray evenly. Use 10 to 20 grams of net (10% imidacloprid) once per acre, and spray 30 to 40 kg of water to control aphids.
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