For different kinds of rapeseed, different winter measures should be taken: 1 seedling early transplanting rapeseed field. If the transplanted plots have been applied to the base fertilizer, Miaofei should be applied to the available fertilizer urea at a rate of about 5 kilograms per mu; if no base fertilizer is applied, three elements of nitrogen, phosphorus and potassium fertilizers should be applied to 30 to 40 kilograms per mu. 3 to 5 kg of urea and 1 to 1.5 kg of borax. After fertilization, combined with cultivating loose soil, the soil was used to cover fertilizer around the roots of rapeseed. 2early soil, diligent cultivator. After rape live, it is necessary to loosen soil early, diligently cultivating, remove compaction, loosen the soil and raise the temperature of the soil. In combination with the cultivating loose soil, the roots should be properly cultivated with fine soil to reduce the leakage of wind-breaking seedlings and promote good root development. 3 Pest control. In warm winter, the temperature is relatively high, and the seedlings are susceptible to insect pests. In the case of rapes that are not pest-treated before transplanting, and rapes that are already infested with locusts, cabbage caterpillars, and vegetable pods, they must be sprayed and prevented in time. 4 winter fertilizer, early application of fertilizer. Waxy fertilizers have a warming effect on the soil and are generally dominated by slow-lasting farmyard fertilizers. Double-low conventional rapeseed or double-low hybrid rapeseed varieties can be applied early to apply fertilizer, that is, Lashichun, and they can usually be applied after the winter solstice. If the rapeseed at the end of the foot is full, the winter solstice seedlings will not be deferred and reddened. At this time, urea 7.5 kg or nitrogen, phosphorus and potassium three-element compound fertilizer 15-20 kg can be applied per acre. Live rapeseed field 1 seedlings fill deficiency. In case of seedlings, seedlings can be used to plant seedlings with soil transfer seedlings, and root water is poured in time after transplantation to strengthen management. 2 seedlings, Dingmiao. To control the seedlings in 2 to 3 true leaf stages, draw the seedlings into a single seedling. After 5 to 10 days, when the seedlings grow 4 to 5 leaves, remove the excess seedlings, miscellaneous seedlings, and the sick and the weak as scheduled. seedling. If the rapeseed is not set in time, it will quickly form tall seedlings, weak seedlings, and extremely poor resistance to stress. 3 cultivating loose soil, topdressing and raising seedlings. After fixing the seedlings in rapeseed, the seedlings shall be top-dressed in a timely manner, applying 10-15 kilograms of urea per acre, and then ploughing the soil and loosening the soil. To the winter solstice around the solar terms also depends on seedlings to apply fertilizers and fertilizers. The specific practices are similar to the field management of transplanted rapeseeds. No-tillage transplanting rapeseed field early 1 Miao Fei. Usually 1.5 to 2 kg of pure nitrogen per mu. For strong seedlings, basal fertilizer can be less or not applied; for small seedlings, growth potential differences, early application, and more facilities. Ammonium bicarbonate must be applied deeply, urea can be applied, and when it is dry, it must be fed with water, combined with drought and fertilization to increase fertilizer efficiency. 2 earthworm roots. There are many weeds in the rapeseed, and the soil is compacted, which is unfavorable for root development. The cultivator and smashed roots in winter should be divided into two phases: for the first time, after the ground ditch is dry, the soil should be smashed in time, and the roots should be smashed to make the rows concave; the second time, organic fertilizer should be applied between the rows. Covered with gully, dry land and cotton paddy fields must also be ploughed in early and medium tillage. 3 Clean up the drainage system. No-till live rapeseed field 1 early Miao Fei. Generally, under the quick-release chemical fertilizer, 1.52 kg of pure nitrogen is used per acre. 2 open a good ditch to clean up the drainage system. 3 control weeds. Herbicides are generally used to control grass weeds used Ganoderma lucidum, fine grass weeds grams; control broad-leaved weeds Gao Teke; prevention and treatment of grass weeds and broad-leaved weeds with Venus, food Wang Xing and other agents.
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