How to prevent rape Fertilizer damage

1. To reform the fertilization method in accordance with the principle of practicality, practicality and effectiveness, the compost and mature organic fertilizer made by retting with enzyme bacteria are recommended, and the method of layered application or deep application of the whole layer is adopted. According to the planned stubble and the total amount of fertilizer in the current year, it can be applied at one time during deep ploughing, and the formula fertilization technology should be adopted to master the formula of nitrogen, phosphorus, potassium and trace elements. After application, it is necessary to determine whether to water the soil according to the degree of dryness and wetness of the soil. generally, it is necessary to keep the soil moist and make the fertilizer fully mature. Do not sow or plant immediately after dry application. 2. The amount of fertilizer used per mu in rape field is 25 kg of ammonium bicarbonate, 15 kg of ammonium sulfate and 10 kg of urea per mu scientifically. Weather, soil, seedling conditions and physical and chemical properties of chemical fertilizer must be taken into account when applying chemical fertilizer. It can not only give full play to fertilizer efficiency, but also save costs, and effectively prevent the occurrence of fertilizer damage. Reduce the amount of chemical fertilizer as much as possible, and advocate the application of controlled slow-release fertilizer, wrapped fertilizer, silicate bacteria biological potash fertilizer and so on. Third, advocate the mixed application of biological fertilizer and chemical fertilizer in the rape field with long-term application of chemical fertilizer, the number of soil microorganisms will be reduced, and the decomposition of organic matter will be hindered, which will not only easily lose nutrients, but also reduce its utilization rate. Therefore, the mixture of biological fertilizer and chemical fertilizer can improve the long-applied chemical fertilizer soil, which can not only make up for the deficiency of nitrogen content in biological fertilizer, but also prevent the loss of chemical fertilizer. The rape field can be burrowed with biological fertilizer of 50kg / mu. 4. When applying foliar fertilizer and Huimanfeng foliar fertilizer, the effect is better when the dosage is 250ml / mu and diluted to 400ml / mu.