Detailed Explanation of Longan Seedling Raising Methods and Technical Points
Longan is a very popular fruit with relatively high nutritional value, offering various benefits such as nourishing the blood and calming the mind, and tonifying the heart and spleen. It is a fruit that serves both as food and medicine. It has a very wide cultivation area in the tropical provinces of our country. The seedling raising work for planting longan is very important, and the most common method for longan is seed propagation. So today, the editor brings you the longan seedling raising methods. Let's take a look below!
1. Site Selection and Fertilization
The longan seedling bed should be chosen on soil with normal drainage and irrigation, flat terrain, deep and soft soil layers, and sufficient fertility. After selecting the soil, the soil should be prepared by clearing stones and previous crop residues from the field. Then deep plow the soil about 26-29 cm and make beds and dig trenches. During soil preparation, we should also apply sufficient base fertilizer, mainly decomposed farmyard manure, combined with nutrients such as calcium magnesium phosphate, and fully ferment it. Then mix the fertilizer with the soil, stir evenly with the topsoil, and then prepare for sowing.
2. Seed Treatment
The longan seeds used for seedling raising must be plump and must not be allowed to shrivel. When sowing, clean the fruit flesh and mucus off the seeds, then remove inferior seeds to ensure the overall quality of the seeds. Then soak the seeds in water to promote germination. After soaking, spread a layer of sand in a cool area, place the seeds flat on the sand, then put another layer of sand on top of the seeds, and then cover with grass to maintain the seeds' moisture and improve the germination rate. The germination-promoting temperature should be maintained at around 25 degrees, and must not be too high, to prevent high temperatures from causing the seeds to lose viability. After about 4 days, when most seeds have sprouted white, they can be sown.
3. Timely Sowing
Before sowing, first dig the sowing holes, with a plant and row spacing of about 30 cm. Place 1 seed in each sowing hole, cover with fine soil after sowing, and then cover the bed surface with a layer of grass to improve water retention and prevent water shortage. To promote the seeds to sprout as soon as possible, we should control the number of seedlings raised according to the planting area. Generally, the optimal number of seedlings per mu should be around 6,500. If seedlings are too dense, it will affect the thickness of the longan tree. It will also reduce the survival rate after transplanting and the speed of canopy expansion after survival.
4. Seedling Stage Management
When sowing longan, it is generally in summer, and the high-temperature environment is very unfavorable to the growth of longan seedlings. So before sowing, we can plant some green manure such as soybeans in the field. When the green manure grows to about 20 cm, it is time to sow longan. At this time, the green manure can provide good shade for the longan seedlings and improve their survival rate. After the temperature gradually drops, the green manure can be pulled up and placed on the bed surface as fertilizer. Then when the longan seedlings grow 4 leaves and begin to turn green, we can shorten the root of the main root. This can effectively improve the survival rate after planting and promote early fruiting.
The above is a brief introduction to longan seedling raising methods. The longan seedling raising method is very important, and we must pay much attention to it when planting. That's all for today's introduction. This article is for reference only, and I hope it can help everyone!