1. Fertilization time: Fertilize at different times in each growth stage of crops, such as before sowing, after cultivation, during growth and during flowering and fruiting.
2. Fertilization amount: Fertilization amount depends on different crops, different growth periods, different soil fertility conditions and climatic conditions. The dosage per mu is 20~40 liters, and low temperature fertilization in the morning and evening can improve the absorption effect.
3. Fertilization method: drip irrigation, sprinkler irrigation, spraying and rhizosphere fertilization can be used. Pay attention to avoid direct contact between fertilizer and root system when fertilizing.