For pear production, the application of organic fertilizers is low, the content of soil organic matter is low, the amount of nitrogen fertilizer input is large, the utilization rate is low, the input of potassium fertilizer and middle and trace elements is small, the fertilization period, fertilization method, and fertilizer ratio are unreasonable, and the soil calcium, The lack of iron, zinc, boron and other trace elements is widespread, especially the lack of phosphorus, potassium, calcium, and magnesium in pear orchards in the south, and serious soil acidification. The Plant Management Department of the Ministry of Agriculture, the National Agricultural Technology Extension Service Center and other units have proposed The following fertilization principles:

(1) Increase the application of organic fertilizers, plant green manure in orchards, cover straws, and fertilize the soil. Orchards with severe soil acidification should be improved by applying lime and organic fertilizer. (2) According to the soil fertility conditions of the pear orchard and the growth status of the pear trees, appropriately reduce the amount of nitrogen and phosphorus fertilizers, increase the application of potassium fertilizer, and supplement calcium, magnesium, iron, zinc, boron and other trace elements through foliar spraying. (3) Determine the fertilizer application period, amount and nutrient distribution ratio in combination with green production-increasing and efficiency-increasing cultivation techniques, yield levels, and soil fertility conditions. (4) Optimize the method of fertilization, change the spreading application to strip application or hole application, rationally coordinate irrigation and fertilization, and adjust fertilizer with water.

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