1.Spring shoot emergence：Drip irrigation  10-48-10+TE/20-20-20+TE/15-30-15+TE  100-250 grams per plant, 2-3 times, every 7-15 days per time.

                                                 Foliage spray  Liquid B  2000 times liquid per application, 2 applications.

Remarks:

1.In the first 2 years after transplanting fruit trees, a high-phosphorus fertilizer should be used, a balanced fertilizer should be used when the trees enter the fruiting year, and a medium-phosphorus fertilizer should be used after 4-5 years of fruiting.
2.The amount and frequency of fertilization should be determined according to the vigor of the fruit tree and the fruiting year. For example, young fruit trees and weaker fruit trees are suitable for multiple thin applications of additional fertilizer.

3.Apply fertilizer once during the spring shoot growth and once during the flowering period to improve the quality of flowers.

2.Flowering stage：Drip irrigation  31-10-10+TE  100-250 grams per plant, 2 times.

Remarks:

During the spring shoot growth period, use a relatively larger amount of fertilizer at one time, while after the fall of the flower, use a relatively smaller amount of fertilizer at one time.

3.setting stage：Drip irrigation  CA Mg fertilizer  1-2 kilograms per acre per time, every 7-10 days per time, continuously used.

Remarks:

Start using fertilizer after the fall of the flower to ensure the healthy growth of the fruit and meet the nutrient requirements during this period until the end of the second physiological fruit drop to ensure fruit retention. Use fertilizer to promote root growth after the spring shoots turn green.

4.fruit enlargement period：Drip irrigation  20-20-20+TE  100-250 grams per plant, 2-3 times, every 7-15 days per time.

                                                                          Fish protein   4-6 kg per acre, every 10-15 days per time, continuously used.

Remarks: 

1.Provide nutritional requirements for fruit enlargement and color change.drop to ensure fruit retention. Use fertilizer to promote root growth after the spring shoots turn green.

2.Improve fruit quality and avoid the third fruit drop.

5.Turning color：Foliage spray  potassium dihydrogen phosphate  600-1000times/time，7-15days/time，2-3times.

Remarks: 

Ensure an adequate supply of potassium during fruit enlargement and ripening to meet the plant's needs.

After harvest: It is recommended to apply 31-10-10+TE fertilizer at a rate of 100-250g per plant and spray a diluted solution of potassium dihydrogen phosphate at a ratio of 1:2000 to quickly restore the vigor of the trees and promote the differentiation of flower buds.

Supplement：                                                                                                                                                                                                                                                                              1.In the year when the fruit tree starts to bear fruit and needs to develop its canopy, you can irrigate 31-10-10+TE, 15-20 days before each new shoot emerges. When the new shoots turn green, you can apply 10-48-10+TE to promote healthy leaf growth
2.If there is an alternate bearing pattern, apply a dose of potassium dihydrogen phosphate during the spring shoot growth to improve fruit set.
3.Apply a dose of potassium humate before each rooting peak period.

Suggestion:                                                                                                                                                                                                                                                                                 1.During the fruit ripening period, a little 0-160-500+TE can be applied to promote the fruit ripening and improve the quality of the fruit；
2.In the event of a disaster year, it is recommended to use some seaweed products to improve the tree's ability to resist stress.；
3It is recommended to use some trace element products during the flowering and fruiting stage to improve the quality and nutritional value of the fruit, such as the Duogao EDTA series of products；
4.5-60-340+TE：Citrus can be treated with pesticide in combination with protective agents during the fruiting period, which can promote fruit enlargement, color change and rapid replenishment of phosphorus and potassium after being attacked by pests or injured

Notes:
The amount, frequency, and type of additional fertilizer should be adjusted according to specific circumstances.
It is important to avoid excessive use of nitrogen fertilizer before citrus harvest, as this can lead to shortened storage time for the fruit.