1, sowing and breeding
Harvest seeds every year11-65438+February, and sow or sow on sandy loam in spring and March of the following year. Disinfect the soil with 800 times solution of chlorothalonil or 800 times solution of potassium permanganate before sowing, and spray 50% phoxim granules evenly on the bed surface to kill underground pests. Soak the seeds in warm water at 50℃ for 2 ~ 4 hours. The drilling spacing is 30 cm and the depth is 2 cm. After covering the soil, cover the grass properly.
When sowing, seeds and fine sand can be evenly mixed according to the ratio of 1:3, and then evenly spread on the seedbed, covered with soil about 0.5cm thick, and then covered with grass. Sprinkle water 1 time every morning and evening after sowing to keep the soil loose and moist. Those with strong growth can bloom in the same year, but the ear should be cut off in time, because it will affect the future growth.
2. Cutting
Cutting propagation of Lagerstroemia indica is an important asexual propagation method, which can effectively maintain the growth characteristics and ornamental characteristics of Lagerstroemia indica plants.
1) hardwood cutting. Before germination in spring, collect 1 year-old stout branches, cut them into cuttings of about 15cm, and cut the lower end into horseshoe-shaped sections. The cuttings were disinfected with potassium permanganate, soaked in 0.5g/L phytohormone combination (80%IBA+20%NAA) for 30 seconds, and then inserted into loose and well-drained sandy loam seedbed, so that 65,438+0 buds were exposed on the upper part of the cuttings.
Water after insertion, cover with plastic film, and keep warm and moist. When the seedlings grow to 15~20cm, you can uncover the film, cover the sunshade net and water them in time. ?
2) Softwood cutting. Can be carried out in July-August. Select semi-lignified branches and cut them into cuttings with a length of 8 ~ 10 cm, leaving 2~3 leaves at the top. The disinfection and rooting agent treatment of cuttings are the same as those of hard cuttings. The cutting depth is 3 ~ 4cm. Water and irrigate after planting, and shade in the shed. Generally, it can take root in about 20 days, then uncover the film, keep the sunshade net and water it in time. ?
3, air layering propagation
The growing season can be carried out, and March-April in spring is better. The air layering method can select 1~2-year-old branches, cut and girdle the bark with a sharp knife about 1.5cm wide to expose xylem, apply rooting powder solution about 3cm above the cut part (diluted as required), put it on the cut part with a cylindrical plastic bag after drying, wrap the lower part, fill it with loose garden soil, and tie it tightly after watering.
/kloc-Check after 0/month. If the soil is too dry, it can be hydrated and moisturized. After taking root, cut it and replant it.
4, ramet propagation
Before germination in spring or autumn, dig out tillering seedlings germinated in rhizosphere, trim roots and branches appropriately and plant them separately. Small seedlings can be bare-rooted, and big seedlings should carry mud balls. During the tending period, they should be pruned and trimmed frequently to maintain a beautiful tree shape and promote the flourishing of flowers and branches.
5. Grafting propagation
From late February to early March, it is carried out before the branches of Lagerstroemia indica sprout. When grafting, the well-developed seedlings are selected as rootstocks, and the branches of the required color are used as scions, and the grafting method is adopted. First, the top of the rootstock is vertically split near the peripheral part, with a depth of 3-4 cm, and then the scion with 2-3 buds and a length of 5-8 cm is cut into a wedge shape, and the split part inserted into the rootstock is aligned with the cambium.
Then, the whole grafting site and scion are wrapped with plastic film, only the bud head is exposed. This method is used to graft branches of different colors on the same rootstock in layers to form multi-color trees. After 2 ~ 3 months of grafting, the film can be loose, and the length of earlobe can reach 50 ~ 80 cm. Branches should be cut short in time to avoid being broken by the wind and can be cultivated into thick branches. ?
6, water and fertilizer management and pruning
Lagerstroemia indica is a positive tree species and should be planted in moist fertile loam with abundant sunshine and good drainage. Water 1 ~ 2 times before germination in spring, and keep the soil moist during the growing period.
Lagerstroemia indica has strong vitality and strong ability to resist harmful infringement, so its management is relatively extensive. The flower buds of Lagerstroemia indica were formed that year. In order to make Lagerstroemia indica bloom in the same year, decomposed organic fertilizer and phosphorus and potassium fertilizer should be applied in early spring to facilitate the formation and differentiation of flower buds. Topdressing a small amount of nitrogen fertilizer from May to June is beneficial to bright colors and prolong flowering period.
Every autumn, Lagerstroemia indica leaves fall behind, so it is necessary to cut off dead branches, pests and diseases in time and burn them. Because the flower buds of Lagerstroemia indica are planted at the top of the new branches in that year, the annual branches of/kloc-0 should be pruned, and the length of the whole branch should be kept at about 5cm to promote the branches to bloom in spring. Avoid cutting short the new branches that germinate in spring, otherwise it will easily lead to the phenomenon that only long branches will not bloom.
In order to prolong the flowering period, the blooming residual flowers can be cut off in time during the growing period to prevent them from bearing seeds and promote the next round of flower branch growth. In order to make the trunk strong, you can cut off many flowers and concentrate on cultivating the trunk.
Extended data
1, growth environment
Semi-shady, like to be born in fertile and humid soil, but also drought-tolerant, calcareous soil and acidic soil grow well. Originated in Asia, it is now widely planted in tropical areas. ?
2. Distribution range
It is grown or cultivated in Guangdong, Guangxi, Hunan, Fujian, Jiangxi, Zhejiang, Jiangsu, Hubei, Henan, Hebei, Shandong, Anhui, Shaanxi, Sichuan, Yunnan, Guizhou and Jilin.
3, the main value
The tree has bright and beautiful colors, long flowering period and long life span, and the age of the tree is 200 years. Now they are widely cultivated as garden ornamental trees and sometimes bonsai in tropical areas. The white flower is called Yin Wei. Lagerstroemia indica wood is hard and corrosion-resistant, and can be used as materials for farm tools, furniture and buildings. Bark, leaves and flowers are strong laxatives; Genpi decoction can treat hemoptysis, hematemesis and hematochezia. ?
Garden value
Wei Zigan Peak bonsai, although the pile head is rotten, is luxuriant and colorful, full of ears, in full swing and colorful. Lagerstroemia indica, as an excellent ornamental tree species, is widely used in park greening, courtyard greening, road greening, block cities and so on. In practical application, it can be planted in front of buildings, courtyards, Chi Pan, rivers, lawns and on both sides of park paths. It is also a good material for making bonsai.
Medicinal value
Efficacy: clearing away heat and toxic materials, cooling blood and raising blood.
Indications: Treatment of postpartum hemorrhage, hemorrhage, hemorrhage, scabies and tinea.
Tropism of nature and taste: southern Yunnan materia medica: cold in nature, slightly sour. Liver meridian
Administration and dosage: oral: decoction, 1 ~ 3 yuan. External use: decocting and washing,
Avoid medication: pregnant women should not take it.
Medicinal part: the roots (Lagerstroemia indica) and leaves (Lagerstroemia indica) of this plant are also used as medicine, and each has its own articles in detail.
Textual research: it comes from herbs in southern Yunnan.
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