Red beauty has a great demand for fertilizer and water, so it is necessary to strengthen fertilizer and water management reasonably and increase the total amount of fertilization throughout the year.
Young trees are similar to other citrus varieties, mainly using nitrogen fertilizer and organic fertilizer. The principle of applying thin fertilizer frequently is to cultivate good high-yield tree types.
Fertilizers are mainly applied to trees put into production four times a year, that is, base fertilizer, germination accelerating fertilizer, fruit strengthening fertilizer and fruit picking fertilizer.
Base fertilizer: quick-acting organic fertilizer, balanced compound fertilizer, medium and trace element fertilizer, combined with deep tillage to improve soil.
Germination-accelerating fertilizer: it is applied before the spring shoots germinate, mainly with quick-acting nitrogen fertilizer and potassium fertilizer, combined with the application of bird's nest root rooting agent to accelerate the roots and promote new shoots.
Strong fruit fertilizer: basal application of organic fertilizer+balanced compound fertilizer+medium and trace element fertilizer in the first half of July can achieve the purpose of strengthening fruit, promoting shoots and nourishing roots.
Fruit-picking fertilizer: it should be applied 10~ 15 days before fruit harvesting, with quick-acting compound fertilizer as the main method to quickly restore tree vigor.
In addition, the nutrient supply of citrus should be topdressing at each key growth stage, such as applying boron fertilizer at flowering stage, spraying "bird's nest foliar fertilizer" at fruit preservation stage and spraying calcium fertilizer at fruit expansion stage.
Open chest or round head plastic surgery was used. In the young tree stage, the main methods are to enlarge the crown, cultivate the backbone branches and increase the leaves at the top of the crown branches.
After planting for one year, it is necessary to promote the emergence of multiple branches in spring, summer and autumn, accelerate the formation of crown, prune the trees that have been put into production in time, cultivate effective fruiting branches, and appropriately cut off the extended branches of the main branches and auxiliary branches to maintain their growth and tree potential.
Adult fruit trees should be pruned mainly in spring and combined all year round. In spring, trees with too many main branches and too dense main branches should be pruned in time to improve the lighting conditions.
For high grafting trees, the crown should be cultivated as soon as possible in the first year and the second year of high grafting, and the backbone branches with uniform growth and good distribution position should be selected as the main branches. Citrus is cultivated in protected areas until February of the following year, and can bear fruit every other year.