Under natural growth conditions, golden mango has a large number of flowers, complex flower shapes and low fruit setting rate. In order to improve the fruit setting rate, topping should be adopted. The method is: when the inflorescence is formed, cut off the inflorescence of 1/3 on a sunny morning after the dew is dry. When the small fruit grows to the size of the thumb, remove the deformed fruit and sparse the redundant fruit, leaving only one fruit per inflorescence.

Step 2: plastic trimming

Small trees should be transformed. After planting, it should be pinched and cut at 50~60cm of the trunk to promote branching. Cultivate 3~4 robust and evenly distributed main branches. When the main branch is 30 ~ 40 cm long, the secondary branch should be promoted by pinching, leaving 3 ~ 4 branches.

Pruning of fruit trees should be carried out after fruit picking. Dense shading branches, overlapping branches, crossing branches, aging branches and pest branches on the crown are cut off, so that the crown is ventilated and transparent, nutrients are accumulated, and good fruiting mother branches are cultivated.

3. Fertilizer and water management

Young trees are dominated by nitrogen, plus the frequent use and sparse application of phosphorus and potassium fertilizers. Fertilize each plant once every 15 days, spraying 0.05-0.5 kg urea or 0.05-0.5 kg compound fertilizer and a small amount of manure. Fruit trees are usually fertilized in four stages:

Promote flower fertilizer and promote the orderly and healthy growth of inflorescences. 65438+ 10 in late October, each plant was applied with 0. 15~0.25kg urea +0.25~0.5kg compound fertilizer+decomposed light manure water, and furrowed under the canopy drip irrigation line.

Strong flower fertilizer, from mid-February to early April is the budding and flowering period. Fertilization is mainly based on phosphate fertilizer, supplemented by nitrogen fertilizer. Spraying 0.25 kg of calcium superphosphate +0.25 kg of urea+a small amount of manure water on each plant.

Strong fruit fertilizer, the fruit expansion period is from May to mid-June. If the fruit falls off or develops poorly due to lack of nutrition, topdressing should be done in time according to the tree potential and fruit yield. Apply 0.4KG+ compound fertilizer +0. 15 kg potassium sulfate +0. 15 kg calcium superphosphate+light manure water to each plant.

4. Blister disease is a common physiological disease of mango. Golden mango, in particular, has large fruit, soft meat, less fiber, high fruit sweetness and high commodity value. However, physiological diseases are prone to occur in planting management, among which blister disease is the most common and serious disease of golden mango. Blister disease generally occurs in the middle and late stage of mango gold growth.

Specifically, the surface of the fruit is covered with black spots with tumor-like protrusions. After the "bubble" is broken, there will be glue flowing out, which will not only reduce the appearance of fruit, but also reduce the quality of fruit, which will bring considerable economic losses to fruit farmers.

Treatment: spraying before flowering, the fruit is 200-300 times safer+600 times of Hefengsu+boron fertilizer. Calcium and potassium are mainly supplemented in young fruit stage and fruit expansion stage. Calcium participates in the composition of cell wall in the form of pectin calcium, which makes pericarp cells dense, increases the thickness of wax layer and enhances stress resistance. Spraying can be repeated for 200-300 times during the fruit growth period, and 1-2 times is 600 times.