How to Grow Magnolia officinalis? A Detailed Guide to Planting Techniques and Management Methods
Magnolia officinalis, also known as purple magnolia bark and purple oil magnolia bark, is a plant in the genus Magnolia of the family Magnoliaceae, and is cultivated in places such as Sichuan and Hubei in China. Its bark, root bark, flowers and seeds can all be used as medicine, with effects of resolving dampness and relieving stagnation, promoting qi flow and relieving asthma, aiding digestion and dispelling phlegm, and expelling wind and relieving pain. Its seeds can be pressed for oil, with an oil content as high as 35%, giving it significant economic value. So how should it be planted? Let's find out together.
1. Site Selection and Land Preparation
The Magnolia officinalis tree is a plant that loves light and fertilizer, so a sunny, wind-sheltered area should be chosen for planting, requiring loose, fertile soil with good drainage; it can be planted in mountain yellow-red loam soil in the south. The seedling nursery requires an altitude above 300-800 m, with a slight slope; for the afforestation site, a sunny slope with deep soil layers, loose soil, fertility and convenient irrigation and drainage should be chosen. The seedling nursery should be deep-plowed in winter, with 3000 kg of farmyard manure applied per mu, then raked fine and leveled, and beds made; the afforestation site should have holes dug at a spacing of 3×3 m between plants and rows, generally with the length, height and width of the holes all being 50 cm.
2. Propagation Methods
Propagation methods for Magnolia officinalis include seed propagation, cutting propagation and layering propagation, with seed propagation mainly used in production. Generally, excellent mother plants grown for 15-20 years are selected as seed sources; after collecting mature seeds and a series of treatments, the seeds are mixed with wet sand at a ratio of 1:3 for storage, to be sown the following year. Sowing can be done in spring or autumn, with spring sowing in February-March and autumn sowing in November. During sowing, the drill method is used, opening shallow furrows about 3 cm deep in the seedling nursery, sowing the seeds evenly, covering with soil and grass to retain moisture, using about 15 kg of seed per mu.
3. Seedling Stage Management
After the seedlings emerge, the covering grass should be removed promptly, and soil loosening and weeding should be done well, pulling weeds as soon as they appear to keep the seedling nursery free of weeds. After weeding, it is recommended to spread a layer of burnt soil, which can protect the roots of the seedlings and promote their growth. At the same time, attention should be paid to shading from the sun to avoid strong light burning the seedlings, and mainly drainage and waterlogging prevention measures during the rainy season to avoid water accumulation causing root rot. When the seedlings grow to the stage of five leaves wrapping the heart, 5 kg of urea can be applied per mu as a top dressing, either by broadcasting during the rainy season or by mixing the urea with water and splashing it on during clear weather.
4. Transplanting
Transplanting can be done after one year of growth in the seedling nursery; if it is a higher-altitude area, two years are needed before transplanting and establishing. For planting, late autumn is chosen for a higher survival rate. Dig out the seedlings with their roots, plant them in the prepared holes, straighten the seedlings during transplanting, spread out the root system without bending it, then cover with soil layer by layer and press firmly; when half the hole is filled, lift the seedling once to let the roots spread out, water, and then cover with a layer of loose soil.
The above are the planting techniques for Magnolia officinalis. We hope it helps you. To learn more planting knowledge, please stay tuned to us.