Main points of balanced fertilization techniques

Onion simple balanced fertilizer fertilization technology: on the basis of organic fertilizer on the land like fertility, suitably pure nitrogen fertilizer per acre is 20 to 25 kg, 6 to 8 kg of phosphorus pentoxide, potassium 20 ~ 30 kg, equivalent to urea 40 ~ 55 kg, ordinary calcium phosphate (effective phosphorus content of 12% ) 50 ~ 65 kg, potassium chloride (effective potassium content of 60% ) 35 ~ 50kg . When the soil fertility is low and the organic fertilizer is lacking, higher fertilization amount can be considered. Conversely, when the soil fertility is high and the soil foundation is good, the amount of fertilization can be appropriately reduced.

Fertilization method: Before sowing the green onion, 20% of the nitrogen and potassium fertilizers and all the phosphate fertilizers are mixed and used as the base fertilizer to spread the whole layer and deep into the soil. The remaining 80% of nitrogen and potassium as top dressing, in mid-September and mid to late 10 twice topdressing.