Longan results in the tree before harvesting

Longan is the fruit of the year and year and the fruit of the worst in the next year. The main reason is that after a large number of flowering results of the longan tree, the tree is weak, and it is impossible to produce a strong autumn shoot, which can not form a good result of the mother branch, resulting in less flowers and less fruit in the second year, and even no flowers and no fruit. If the pre-harvest fertilizer and post-harvest fertilizer are applied in time, ensure sufficient nutrient supply, delay the decline of the tree, accelerate the rejuvenation of the tree, and harvest the healthy autumn shoots in time to form a good result mother branch, the second year The result of normal flowering and good harvesting can overcome the results of years and years and the results of the next year.

Methods Before the harvesting of longan, the fertilizer was applied 15 to 20 days before harvesting. The main fertilizer was NPK, the plants above 5 years old, or the trees with 50 kg or more, and each application of NPK (15-15-15) ) Potassium sulfate or nitrate-based or pure sulfur-based compound fertilizer 0.75 ~ 1 kg, evenly spread on the topsoil under the canopy after rain. After harvesting the fruit in the longan, the post-harvest fertilizer is applied within 5 to 10 days. The quick-acting quick-acting nitrogen fertilizer and potassium fertilizer are mainly used. Each plant applies 0.75-1.00 kg of urea and 0.50-0.75 kg of potassium sulfate. After rain, it is evenly applied on the topsoil under the canopy. Just fine. In addition, at the same time as the root fertilization, it is necessary to carry out the top dressing. Spray a 0.2% to 0.3% potassium dihydrogen phosphate, 0.1% magnesium sulfate, and 600-800 times amino acid active liquid fertilizer mixture on the leaf surface before fruit picking. After fruit picking, spray 2~3 times of 0.1% magnesium sulfate, 0.2% urea, 0.3% potassium dihydrogen phosphate, 800-1000 times humic acid active liquid fertilizer mixture, spray once every 7-10 days, evenly spray wet All the branches and leaves inside and outside the crown are suitable to start with drops of water. Supplementing various nutrients from the foliage helps to stabilize and rejuvenate the tree.

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