How to promote flower bud differentiation in longan? The latest methods are here

Flower bud differentiation in longan is the foundation for flower formation, and flowers are tied to fruit, so how well flower bud differentiation goes is directly related to the yield and quality of that year. Therefore, doing a good job of longan flower bud differentiation work has an obvious effect on increasing yield and quality, so how should longan flower bud differentiation be promoted? Let's take a look together.

1. Chemical shoot control

For plants with excessively strong tree vigor, spraying ethephon in November-December can significantly inhibit winter shoots and promote flower bud differentiation. When autumn shoots appear or winter shoots have already sprouted, ethephon can be sprayed at this time, but pay attention to the concentration; it can force the winter leaves to drop while retaining the tender stems and their growing points. If the effect is not obvious, the concentration can be increased for another spraying. When spraying, aim at the leaf surface and leaf underside; never repeatedly spray or re-spray the same planting or the same branch, so as to avoid causing fruit drop and harming later growth.

2. Apply potassium fertilizer in winter

Longan has a relatively large demand for potassium. Applying additional potassium fertilizer in winter can significantly improve its cold and frost resistance, enhance its stress resistance, and benefit flower bud differentiation and formation. Generally, apply 1.5-2 kg of potassium chloride per plant, usually in December by opening a ring ditch for application. If the soil is too dry, water an appropriate amount after fertilizing. At the same time, during the thawing period, a low-concentration solution of monopotassium phosphate and potassium chloride can be used for foliar fertilization 2-3 times, sprayed once a week.

3. Moderate girdling

Girdling is also a commonly used measure in production to promote flower bud differentiation, generally carried out after autumn shoots have fully aged and before winter shoots sprout. It can be done on primary or secondary branches, but usually girdling is not done on the main trunk. Girdle at a relatively smooth spot 10-15 cm from the branch, with the girdling width controlled at 0.2-0.3 cm, and the depth reaching the xylem, but it should not damage the tender xylem, so as not to cause irreversible loss to the plant. After girdling, disinfect the wound well, so as to prevent pathogens from invading through the wound and causing the plant to become infected with disease.

4. Binding with iron wire

For young fruiting trees, because the tree vigor is relatively weak, girdling is not suitable, so at this time the method of binding with iron wire can be used to promote flower bud differentiation. When tying the iron wire, be careful not to use too much force, so as to avoid cracking the bark. The timing of ring binding is also determined by the thickness of the trunk, and changes in the leaves can also be observed; when the leaves turn yellow, remove it in time and restore tree vigor as soon as possible.

The above is an introduction to how to promote flower bud differentiation in longan. We hope it can help you. To learn more related knowledge, please follow us.