Study on the NPK nutrient balance of cultivated soils in Quanzhou

Cultivated soil in Quanzhou City had been monitored for 5 years.The results showed that applying fertilizer with the routine management, caused the surpluse of nitrogen.phosphorus in the soil but the potassium lost seriously.Fertilizer-Applying structure needs to be adjusted to steady nitrogen fertilizer, control the phosphorus fertilizer, increase the potassium fertilizer, rely mainly on the organic fertilizer.