“There are insufficient organic fertilizers for fertilizing pear trees throughout the province, and the proportions of nitrogen, phosphorus, and potassium fertilizers are unreasonable. The phosphorus, potassium, calcium, and magnesium in the pear orchard soil are lacking, and the input of trace elements in the pear orchard is small. Neglecting the application of micronutrients such as boron and zinc, Insufficient application of topdressing, methods of fertilization, improper timing, etc. Therefore, it is necessary to apply more organic fertilizer and fertilize the soil.” Recently, experts from the Soil and Fertilizer Department of the Provincial Department of Agriculture stated that in the spring, high yield, good quality cultivation techniques, yield levels, and soil fertility conditions should be combined to determine Pear fertilizer application period, amount and ratio.

Experts believe that pear fertilization, to properly control the amount of nitrogen and phosphorus fertilizer, increase the application of potassium fertilizer, coordination of nitrogen, phosphorus, potassium fertilizer ratio, pay attention to the application of basal fertilizer, increase the amount of topdressing; reasonable application of boron, zinc, iron and other trace elements fertilizer, through the foliage Spraying calcium, magnesium, iron, zinc, boron and other trace elements; the orchard with serious soil acidification, using lime and organic fertilizers for improvement; optimizing the fertilization method, changing the applicator to ditch application or hole application, and combining irrigation with manure , to adjust fertilizer with water. Nitrogen fertilizer is generally divided into basic fertilizers, topdressing before flowering and top dressing during fruit enlargement. It should be applied at a ratio of 1:0.5:1 during fertilization. Phosphate fertilizer should be applied as a base fertilizer at one time. Potash fertilizer should preferably be applied in two batches, with base fertilizer accounting for 60%. Expanding fruit fertilizer accounts for 40%. If the amount of organic fertilizer used in the base fertilizer is large, the amount of chemical fertilizer can be reduced as appropriate.

In addition, the "Sichuan Province 2018-2020 Main Crop Science Fertilization Technical Guidance Program" (hereinafter referred to as the "Proposal") has promoted the use of formula fertilizer in pear trees, and has standardized the amount of fertilizer applied in different pear yield levels.

"Program" clearly, if saplings, the application of nitrogen fertilizer should be 8 to 10 kg per acre, phosphate 2 kg to 3 kg, potassium 2.5 kg to 3.5 kg.

If the target yield per mu is 2,000 kg, 18 kg of nitrogen fertilizer, 9 kg of phosphate fertilizer and 15 kg of potassium fertilizer should be applied per acre. The use of fertilizers in different growing seasons is as follows: Basal fertilizer is applied before deciduous harvest after fruit is harvested. 2000 kg of fertilizer, or 7 kg to 8 kg of organic fertilizer for each pear plant (including 10 kg, 9 kg, and 10 kg of nitrogen, phosphorus, and potassium, respectively); and top dressing before flowering, 4 kg of nitrogen fertilizer can be applied per acre. In the fruit expansion period, 4 kg of nitrogen fertilizer and 5 kg of potassium fertilizer should be topdressed.

If the target yield per mu is 2500 kg, 21 kg of nitrogen fertilizer, 10 kg of phosphate fertilizer, and 18 kg of potassium fertilizer should be applied per acre. The use of fertilizers in different growing seasons is as follows: Basal fertilizer is applied before deciduous harvest after fruit is harvested. 2500 kg of fertilizer, or 10 kg of organic fertilizer per plant (including 11 kg, 10 kg, and 12 kg of nitrogen, phosphorus, and potassium, respectively); top dressing before flowering, 4 kg of nitrogen fertilizer per acre can be applied during the expansion period Each acre should be topdressed with 6 kg of nitrogen and 6 kg of potash.

If the target yield per mu is 3,000 kg, 25 kg of nitrogen fertilizer, 12 kg of phosphate fertilizer, and 21 kg of potassium fertilizer should be applied per acre. The use of fertilizers in different growing seasons is as follows: Basal fertilizer before deciduous use after fruit harvesting, and organic fertilizer per acre. 3000 kg of fertilizer, or 12 kg of organic fertilizer per plant (including 12 kg, 12 kg, and 14 kg of nitrogen, phosphorus, and potassium, respectively); top dressing before flowering, and 5 kg of nitrogen fertilizer per acre can be applied during the expansion period Each acre should be topdressed with 8 kg of nitrogen fertilizer and 7 kg of potassium fertilizer.

The fertilization of pear trees generally applies basic fertilizer after harvest of autumn fruits. Spring buds are applied before germination in early March and strong fruit fertilizers are applied in late June.

When the pear tree is small, fertilization is generally used in the ring groove. The location of the fertilization is 0.3 to 0.5 meters outside the crown. The width of the groove is 20 to 40 centimeters and the depth is 20 to 30 centimeters. The fertilizer and soil are used. After appropriate mixing, it is applied into the ditch, and the ditch is filled; the whole pear garden is fertilized and combined with the cultivator to turn the fertilizer into the soil or fertilize in a radial groove. Organic fertilizers and phosphorus and potassium fertilizers are best applied to deep layers of soil that are 20 cm to 30 cm deep. Pear trees lacking B, Zn, and Fe can be sprayed with 0.3% to 0.4% borax, 0.2% zinc sulfate, and 0.3% to 0.5% urea for several times (once-a-weekly) before germination to flowering. Liquid, 0.3% ferrous sulfate + 0.3% to 0.5% urea solution.

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