Can the seeds of Lagerstroemia indica be planted again after flowering?

Yes, Lagerstroemia indica can adopt seed sowing and seedling raising technology. Now the seed sowing and seedling raising techniques of green farmers in Jiangxi are introduced as follows:

1, seed collection

Generally, mature Lagerstroemia indica seeds are collected from June 5438+00 to June 5438+0 1. When collecting seeds, healthy plants with relatively vigorous growth are usually selected as collection trees. When a small amount of fruits are cracked, the capsules are collected in the morning, dried in the sun to crack the peel and remove seeds, then impurities are removed, bagged and stored in a ventilated and dry place. It is not advisable to collect seeds too late. If the seeds fall too late, it is not easy to harvest.

2. Sowing method

Adopt flat bed to raise seedlings. During deep ploughing of frozen soil in winter, 200-400 kg of cake fertilizer and 50- 100 kg of high-efficiency compound fertilizer are applied per mu, and slaked lime powder 10-20 kg is applied in coordination with soil preparation to effectively kill underground pests and ensure seedling growth. Then the boundary is leveled, and the seedbed width is 1 ~ 1.2m, the bed height is 20 ~ 30cm, and the ditch width is 30 ~ 40cm, which is convenient for drainage and seedling management.

3. Sowing time

Generally, the sowing time is February-March, and it is better to sow early in time. Weeds grow too fast to be eaten by weeds, which brings difficulties to seedling management.

4. Seed treatment

Lagerstroemia indica seeds are small and have wings at the top. Before sowing, soak the seeds in 0.5% potassium permanganate solution for 2-4 hours for disinfection and sterilization, then take them out and wash them with clean water, soak them in warm water at 30℃ for 65,438+00-20 hours, take them out and drain them to accelerate germination, and wash them with clean water for 65,438+0-2 times a day. Pay attention to keep the temperature of seeds between 20-25℃.

5. Sowing method

Generally, shallow ditches are drilled on the seedbed, with a depth of 3-4 cm, a row spacing of 15-20 cm and a sowing width of 5 cm. Scatter the seeds evenly into the border, evenly cover the soil by 0.5 cm after sowing, and properly press the soil to preserve moisture. Generally, the sowing amount per mu is 1.5-2 kg.

6, seedling management

Proper shading should be done in the early stage of seedlings, and water should be sprayed after emergence to keep the soil moist. When two pairs of true leaves appear in seedlings, thin fertilizer should be applied 2-3 times in June-July after rain, and weeding should be done in time to preserve moisture. When the seedlings are watered, they are about 40-50 cm high in that year and can bloom in a robust year, so they should be cut off in time so as not to affect the tree potential, and transplanted in the vernal equinox the next year.