Does longan need vernalization?

During the seedling stage or other growth process, crops need to spend a certain period of time at a certain temperature (usually relatively low) in order to pass the internal changes that ontogeny needs to undergot, a phenomenon known as vernalization or vernalization.

Yes. Transforming low-yielding orchards. In autumn, the temperature drops and the root vitality of longan increases, so it is necessary to protect the soil of low-yield orchards and runaway orchards, increase organic fertilizer, improve the soil structure of the orchard, increase soil aeration, water and fertilizer retention capacity, and enhance soil fertility.

In addition to the application of sufficient nitrogen, phosphorus and potassium fertilizers, it is also necessary to apply other trace element fertilizers required for the growth of longan, and the trace elements are mainly sprayed outside the root to ensure the growth and development needs of longan at all stages. At the same time, it is necessary to loosen the soil, renew the longan hair roots, improve the vitality of the root system, restore the longan tree potential, and cultivate strong fruiting mother branches, so as to lay a good foundation for the next year's fruit.

Strong flowers and fruits. After the flower spike is extracted 4-6cm or stubbed and thinned, the squirting polyelement is 1000-1500 times, which promotes the flower spike to be robust, and at the same time pays attention to the prevention and control of pests and diseases. 7-10 days after the female flowers flower, that is, before the first fruit drop, spray polysu plus 920 to protect the fruit, apply a strong fertilizer, 10-15 days later, spray again to add potassium dihydrogen phosphate to protect the fruit, can also only make potassium dihydrogen phosphate (concentration, while combined with the control of pests and diseases.

Cultivating fruiting mother branches lays the foundation for a bumper and high-yield harvest in the following year. The most ideal fruiting mother branch of longan is the last ripe autumn branch, so after the fruit is picked, it is necessary to strengthen the water and fertilizer management of the mother tree in time to promote the germination of autumn and cultivate the autumn shoots into strong fruiting mother branches. To control the uniformity of autumn shoot germination with water and fertilizer, you can choose "ribery water-soluble fertilizer", which also facilitates orchard management and pest control.

Pruning and pruning. In order to make the longan tree have a good crown and improve the yield of longan per unit area, the shaping and pruning of longan trees should be carried out twice a year, spring pruning should be combined with thinning flowers and fruits, and autumn pruning should be combined with pruning of the tree-shaped canopy after fruit picking, and the branches that are too dominant in growth should be retracted (referring to the initial production tree), and the weak branches in the canopy, the branches after just picking fruits, diseased and insect branches, and cross branches should be pruned off, so as to improve the ventilation in the canopy, restore the longan tree potential, naturally regulate the endogenous hormone balance of the tree, and ensure the flowering rate of longan in the following year.

Pest and disease control. In autumn, the temperature is suitable, and you should pay attention to pests such as longan psyllid, fruit borer, and mugwort moth. Pest control methods, in the peak period of larval incubation after the detection and reporting, or at the beginning of new shoot germination, the fruit farmers are organized to spray with comprehensive pesticides.

Combined with the prevention and control of other pests, the use of 20% sweep profit 2000 times or 10% 100 extermination can be 2000 times liquid spraying; The enemy kills 2000 times the liquid spray, spraying once every 15 days until the new shoots are old and mature. Deep pruning of diseased branches should be taken, and water and fertilizer management should be strengthened at the same time, and thick shoots should be cultivated.