The weather changes greatly in spring. What are the lychee management techniques?

Flower Spike Treatment

Cut off the flower spikes that have been extracted. When the flower spikes are pulled out again about 15 cm, 3 to 4 branches will be left on each branch. Leave 10 to 15 centimeters of branches and ears and pick the top. For types with excessively long flower spikes, such as Feizixiao, longan and Guiwei, mochi, and Huaizhi young trees, spray half the amount of Shooting Control Spirit when the flower spike is 8 to 10 centimeters to control the spike; you can also manually thin the flowers and pick them At the top, cut off 1/3~1/2 of the flower spike; or when the flower spike is 20 cm long, cut off half of it; this will help the flower spike to be short and strong, and at the same time, branches with too dense or poor flower spikes can be thinned out.

The flower spike development stage is the period when diseases such as downy mildew and lychee stink bugs occur. Pesticides and fungicides should be sprayed every half a month. Pesticides and fungicides should be applied alternately. At the same time, pesticides and fungicides should be applied alternately. Add complex polypeptide chains for extra-root fertilization and spray once 15 days before flowering. It is prohibited to spray pesticides from 10 days before flowering to the flowering period to avoid harming bees or other pollinators. Management during the flowering period

The key to whether cross-pollinated green plants can produce super high yields is whether they can be pollinated and fertilized well during the flowering period. In particular, the flowering period of lychees usually falls during the Qingming solar term, which often encounters continuous rain and ultra-low temperatures. Therefore, we should do a good job in lychee flowering and pollination: (1) Release bees in the plantations during the flowering period to increase the pollination rate; (2) Sprinkle water when drought temperatures occur during the flowering period. ; (3) If it rains during the flowering period, shake the flowers to retain water. Fertilizer management

1. Fertilizer during flowering: The purpose is to absorb fertilizer before flowering and supply the growth of flower spikes and fruits. Organic fertilizers are used after extracting pure flower spikes. Use it 15 to 30 days before flowering at the latest. If tap water fertilizer is used, use it 7 to 15 days before flowering. Fertilizer application amount: Apply 2KG compound fertilizer and 1KG potassium fertilizer per 100kg of peach tree surface for litchi. Apply 3KG compound fertilizer and 1.5KG potassium fertilizer for every 100kg peach tree surface for longan.

2. Fruit-strengthening fertilizer: In mid-to-late May, if there are a lot of lychees and longans bearing fruit, the leaves are yellowish, and the plant shape is poor, fruit-strengthening fertilizer should be applied. The amount of fertilizer applied depends on the actual situation. Generally, 1~2KG of compound fertilizer and 0.5~1.5KG of urea solution are applied to every 100kg of peach trees. Water management

Booting period: Due to the drought last winter, there was little rainfall and water shortage, and the temperature this spring is high, so the water management method is extremely sensitive and should be treated according to the different varieties: litchi prefers drought to wet. ; Longan should be kept wet rather than dry, especially not so dry that the leaves wither, to prevent the plant from declining.

From the flower spike to the fruit development stage: a balanced supply of water should be maintained and the soil should be kept moist to facilitate the growth of flower spikes and fruits.

The above are the key points of lychee management in spring. At this stage, sufficient fertilizer and water must be ensured. Generally, lychees will enter the flowering stage around the Qingming Festival, and at this time, ultra-low temperatures and continuous rain are often encountered, which is unfavorable. When pollination is necessary, human-assisted pollination should be used to increase fruit production.