The rapeseed growth center in the overwintering stage is the leaf and root system of the vegetative organs. It is currently the key period for strengthening the roots and cultivating the winter seedlings. In the face of warm winter, we must start from the following six: 1, the field of excessive growth or upcoming bolting field depends on the seedlings spraying paclobutrazol to control Wang, strong, antifreeze. In general, the use of paclobutrazol 60 grams watered 30 kilograms of spray, can play a role in the promotion of control, delay the birth process, while improving the ability to resist cold. 2, on the early years of early rapeseed early rapeseed to pick the moss, general picking moss 10-15 cm, picking moss before 5-7 days application of a budding fertilizer, acres of topdressing urea 4-6 kg, promote the next part Branches grow. Picking the moss can not only solve the problem of early flowering of rapeseed, but also improve the ability of resisting cold. “Double-low†rapeseed can be eaten freshly and can be used as a dual purpose. 3, live rapeseed fields regardless of the size of seedlings to early seedlings, seedlings, Dingmiao. Usually 20-25 seedlings per square meter or so, the vegetables should be brought out of the field. 4. At present, drought continues, and rapeseed is generally deprived of water, especially in the field of live broadcasting, late sowing, young seedlings and weak seedlings. In the field where the growth is late and the seedlings are weak, topdressing a wax fertilizer before the end of December, the Mushi farmyard fertilizer is about 20 tons or compound fertilizer about 5 kilograms; the field with poor growth potential also needs to apply urea 3-5 per acre. Kilograms raised. The moss fertilizer promotes early application and should be finished before the end of January. Mushi urea should be 5-7 kg. Combine fertilization with clearing the ditch, weeding, loosing soil, and pounding soil to increase the cold resistance of the seedlings. 5. Fields that have applied boron fertilizer at the end can be sprayed once at the initial stage of bolting. If the base fertilizer is not applied with boron or the boron fertilizer is not applied, it should be sprayed once as soon as possible. Spray once. General mu with US Sonic Boron or rich crown boron fertilizer 50 kilograms of water sprayed. 6. The use of drugs should be controlled in time for field plots with locusts.
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