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First, early recovery and catching more Miaofei late planting rapeseed growth is slow, early application of multiple seedlings to promote growth. According to experiments, nitrogen absorption at the seedling stage of rapeseed is 45% of the total growth period, phosphorus is 50%, and potassium is 43%, accounting for almost half of the total fertilizer use. In order to make full use of pre-winter effective temperature and light conditions long leaves, grow leaves, Miaofei should be applied as early as possible, and more appropriate Shi. After fertilizing seedlings for rape, the first fertilization is carried out. Ten to five kilograms of ammonium bicarbonate per acre or 500 to 600 kilograms of manure urine is applied to the water, and 500 to 600 grams of borax per acre is not applied to the fertilizer. Apply together. The second round of dressing is carried out for half a month, with 15 to 20 kg of ammonium per acre or 600 to 700 kg of water for human and animal waste. The seedlings should be applied in appropriate ways. When the soil is dry, more water should be used. Second, early seedlings to promote seedlings late seeding late planting rapeseed field winter time is shortened, is not conducive to the emergence of seedlings, promptly take measures to promote seedlings. When the oilseeds turn green, the first cultivator is used to raise the soil temperature, enhance the permeability of the soil, reduce soil moisture, and promote root growth. Combined with cultivator, apply 3 to 5 kg of urea per acre, and apply water to thin liquid fertilizer to raise seedlings. In paddy field, rapeseeds should be loosened and the soil blocks broken up. After the second half cultivating, the culvert should be deep and the soil should be loosened. In combination with cultivator, do a good job of clean up the three ditch, so that the three ditch common, the field can not water. Third, the use of rice straw, seedling growth with straw covered rapeseed between the rows, can play a role in preventing grass, drought, insulation and fertility, rape late seedlings covered with straw can promote seedling growth. Straw cover is generally 250-300 kg per acre, spread evenly between rows of rape, so that the mud does not see the sky, the grass does not form a group. After spreading, spread thinly on the straw to prevent wind from spreading. Fourth, re-application of wax fertilizer late planting rapeseed growth is slow, small seedlings, cold resistance is weak, it should be appropriate early in mid-December re-application of a wax fertilizer, in order to improve the soil temperature. The wax fertilizer should be dominated by organic fertilizers, generally medium-fertilizer fields, with 1250 kg of pig manure per acre and 10-15 kg of ammonium bicarbonate, and evenly applied to the rapeseed line and combined with the ditch to carry out the cultivation. Roots, covering the soil with fertilizers can reduce the loss of fertilizers and keep it warm and frostproof. Fifth, spraying foliar fertilizer at low temperatures, the rape grows slowly and is in the "hibernation" state. Foliar application of phosphate fertilizer can enhance its cold resistance, which can make rape seedlings safely overwinter, but also can promote the seedlings Miao Qi years ago, the number of green leaves to 10 to 12 pieces. The method for preparing the phosphate fertilizer solution is: take 2 kg of superphosphate per acre, put it in a container and add appropriate amount of water to soak, remove 200 g of urea after one week, spray it to the blade to start dripping, generally spray 2~3 Times, each time interval is 7 to 10 days. It was observed that on the third day after the spraying of fertilizer solution, the leaves that had been frozen to yellow turned green again, and the growth rate accelerated rapidly. After the second spraying interval, the number of leaves had increased from 4 to 5 to 8 to 9 pieces, and green leaves, strong leaves and stems, thick and straight leaves stretch, the roots gradually become larger and larger. When the temperature dropped to 0°C, the rapeseed not only had no frostbite, but also grew vigorously. Sixth, control of early feed late planting Late planting rape before the nutritional growth is weak, prone to early moss early flowers, can take measures to control. The first is to grow deep and plough the well-grown and fertile fields, and cultivate 7 to 10 centimeters near the pods of the rapeseed and cut off some of the roots to control the growth. When the rape falls, apply nitrogen fertilizer. The second is that the poorly growing rapeseed fields can be replanted with nitrogen fertilizers, which can effectively delay vegetative growth, increase the amount of growth, and prevent the occurrence of early moss early flowering. The third is to pick moss on the rape fields that may be bolted to the past years, inhibit the top apex of the plants, transfer the nutrients to the lower branches, and postpone the fertility process. After dressing, apply nitrogenous fertilizer to promote branching.