During the field of rapeseed field management, rational fertilization according to the growing conditions of nursery and different fertility requirements for tuberculosis can play a role in promoting early-onset, stable growth, strong moss, branching, flower promotion, grazing, and grain weight. Has a very significant increase in production. Early Miao Miao. Rape survival or live seedlings after transplanting, Mushi urea 2-3 kg, or ammonium bicarbonate 12-15 kg, against the removal of manure 20-30, timely recovery of seedlings, can promote early rooting leaves, conducive to nurturing Strong seedlings are wintering. For rapeseed that has been delayed or delayed late, after the first half of fattening, the second topdressing should be carried out in an appropriate amount. Fertilizer should be combined with cultivator and herbicide to cover fertilizer. Apply enough to open the fat. The fertilization time was carried out before the late winter rapeseed bolting. The topdressing can increase the temperature and prevent frost damage, and realize the spring use of wax fertilizer. Promote bolting flowering. Mu with high-quality decomposed slag with human and animal manure water, against urea 4-5 kg ​​open nest application, combined with soil cultivator cultivator. Apply stabilizing fertilizer. The time and amount of fertilization should be determined according to the growth of rapeseed. Poor growth before winter, insufficient rapeseed rapeseed should be applied when bolting, generally mu applied to the livestock manure water 10-15, or urea 5-8 kilograms, or ammonium bicarbonate 15-20 kilograms of water; For winter-strong seedlings with good growth and sufficient nutrition before winter, appropriate late application should be applied. Normally, it should be applied when the bolting is 10-13 cm high, and the amount of fertilization should be appropriately reduced. The winter nutrition before adequacy in winter and the vigorous growth will be strong. Seedlings, generally used in flowering, and mainly human and animal excrement, should not be applied nitrogen fertilizer, so as not to grow mad, resulting in late-maturing lust and lodging production. Spray phosphorus, boron fertilizer. The method of application is: during the mossing period and the early flowering period, 0.1-l kg of superphosphate is used per mu, 40 kg of water is soaked for a day and night, and the filter residue is taken for foliar spraying. At the same time, 100 grams of borax with 100 grams of borax, first with a small amount of warm water, after melting, then watered with 70-75 kilograms of foliar fertilization, can supplement the lack of soil boron, and favorable rape blossoms. (Yu Ling) SICHUAN UNIWELL BIOTECHNOLOGY CO.,LTD. , https://www.uniwellbio.com