Detailed Guide to Spring Fertilization Methods After Pomelo Trees Bear Fruit
I. Fertilization for 1-3 year old young trees: To accelerate the growth of young trees and bring forward high yields, fertilization should be carried out multiple times in line with the pomelo tree's characteristic of sending out new shoots several times. Fertilizing before shoot emergence can promote shoot emergence and make the shoots grow robustly. Topdressing should mainly use quick-acting fertilizers. Fertilization method: apply frequently and in small amounts, with more fertilizer applied for spring shoots. The fertilization times are February, May and July respectively....
In spring (February-March), apply the spring shoot emergence and flowering fertilizer well. Fertilizing at this time can promote robust spring shoot emergence, provide nutrients for flowering and fruiting that year, and also lay the foundation for forming robust spring shoot fruiting mother branches the following year, overcoming on-years and off-years and achieving high and stable yields. This time, quick-acting nitrogen fertilizer (manure and livestock fertilizer, urea, ammonium bicarbonate) is mainly used, accounting for 20% of the annual fertilization amount. Generally, for 4-10 year old trees, apply 0.1-0.2 kg of urea or 0.2-0.4 kg of ammonium bicarbonate, 10-15 kg of manure and livestock fertilizer, or 0.2-0.3 kg of compound fertilizer per tree.