Economic fertilizer application amount and suitable proportion of papaya trees

The amount of economic fertilizer application is the lowest amount of fertilizer application when high yield, high quality (or high economic benefit) is obtained due to the effect of fertilization. Practice has proved that, in a certain range, the yield and quality often improve with the increase of fertilizer application. However, when the amount of fertilizer application reached a certain level, the yield and quality of fruit decreased with the increase of fertilizer application. The ratio of nitrogen, phosphorus and potassium fertilizer applied to papaya trees is generally l: (0.4-0.6): 1. In specific fertilization, the amount of nitrogen application can be calculated according to the high and low yield, and then the application amount of phosphorus and potassium fertilizer can be calculated according to the appropriate proportion of nitrogen, phosphorus and potassium. Finally, it should be adjusted appropriately according to the specific growth of the plant. In the dense planting of papaya, because of the high fertilizer use efficiency and low fertilizer requirement, under the same conditions, the fertilizer application rate is about half of that of ordinary plants.