Pomelo is a tall tree with deep roots and luxuriant leaves. Deep soil is required for planting. Loose texture, good drainage and air permeability, organic matter above 2%, PH value between 6 and 6.5, loam and alluvial soil with a soil depth of more than 1 meter are the best.

For pomelo trees planted within 1-3 years, before the spring, summer, and autumn shoots germinate and shoot, apply 1-3 kg of bio-organic fertilizer, combined with fertilization for irrigation. One year before production (the autumn of the third year), on the basis of applying bio-organic fertilizer, a certain amount of phosphorus and potassium fertilizers were applied to the plants to facilitate the differentiation of flower buds.

As a result, the pomelo was fertilized four times a year.

The first time was the spring shoot flowering fertilizer. The plant applied 3--5 kg of bio-organic fertilizer to promote the spring shoots to be strong and to provide nutrients for the flowering and fruiting of the year, and to lay the foundation for the formation of robust spring shoots and fruiting branches in the next year. Overcome big and small years and achieve high and stable production.

The second time is the summer stabilizing fruit fertilizer, applying 1-2 kg of biological organic fertilizer. At this time, it is the time when the shoots of summer shoot out, and when the young fruit grows, avoid the large number of shoots out of summer shoots after fertilization, which will cause a lot of young fruit to drop. The method of extra-root topdressing can also be adopted, continuous spraying 0.2-0.3 kg potassium dihydrogen phosphate plus 0.3-0.5 kg urea diluent for 2-3 times.

The third time is the autumn strong fruit fertilizer, with 8-10 kg of bio-organic fertilizer applied to meet the nutrient needs of fruit growth and shoot.

The fourth time was fruit harvesting fertilizer in winter. As a result, 4--6 kilograms of bio-organic fertilizer was applied to the pomelo trees before and after fruit harvesting to supplement the large amounts of nutrients consumed by the pomelo trees during flowering, fruiting, and tapping, to promote the differentiation of flower buds and ensure the next year's yield.

To fertilize pomelo trees, dig 30-33 cm deep grooves or circular, radial pits near the drip line of the canopy, mix the bio-organic fertilizer with the soil and apply them into the pit, and then cover the soil after watering to prevent the fertilizer from volatilizing , Reduce fertilizer efficiency. In case of prolonged drought and no rain when fertilizing, you can irrigate first and then fertilize.