[Distribution I is native to eastern North America and is distributed along the Mississippi River. The south of the Yangtze River basin in China is introduced and cultivated all over the country and grows well.
Habitus: Magnolia grandiflora is a subtropical tree species. It is very hilar, but the young tree is quite tolerant to yin, prefers warm and humid climate, has a certain ability to withstand early and can withstand a low temperature of 19°C without significant frostbite, but if it is in a long time At a low temperature of 12°C, the leaves were frozen. Fertile, moist and well-drained acidic or neutral soils are well developed on the banks of the river and on the lakeside, with poor growth in dry, calcareous, alkaline and poor drainage. Anti-dust and sulfur dioxide gas to adapt to the urban environment. Deep roots, quite resistant to wind.
[Reproduction] Breeding is generally dominated by grafting, followed by seeding, and domestic cutting is still advocated. Grafted in March-April, with purple magnolia, magnolia, etc. as rootstock, but because of the purple magnolia roots developed, adaptable and widely used. The scion was taken from the annual side of the top branch, to the leaves, cut in the field, quiz soil and the top. After the shoots were stretched, the soil was removed and the rootstock was cut off. The rootstock was fertilized before the rainy season. Seed sowing in September-October, shade after ripening, can be sowing, but also wet sand layering to sow year in March sowing, in May emergence. Seedling growth is slow, sowing should be slightly dense, transplanting the second year after sowing, culturing 2-3 years, and gradually enlarge the row spacing. Seedlings grow slowly and blossom late. Grafting seedlings often occur when sprouting Kwai 1 need to be cut off.
[Cultivation and Management] During the transplant period, the spring shift should be before the root sprout in mid-March and the autumn plant should not be later than October. When transplanting, mud pellets are needed, and the survival rate of the wide magnolia zone soil ball is higher than that of bare roots. The seedling age is negatively correlated with the survival rate, and the bare root planting performance is more prominent. In order to increase the survival rate of large trees, in order to increase the survival rate, appropriate branches and leaves must be repaired, and the pillars should be erected in time to strengthen the fostering.
Cut flower buds in time so that they can quickly form strong vegetative buds, grow upwards, and remove the top buds of lateral branches in time to ensure the superiority of the central main branch. After planting, the main branches that are too horizontal or sagging are trimmed and the balance between the branches is maintained, so that the main branches of the paddlewheels are interspersed with each other to avoid overlapping growth from above and below, and the space is fully utilized. In summer, the roots are cut off at any time. Sparsely cut crowns, branches and branches. On the main branch of the first round of the trunk, the upper branch should be cut off. The new branch near the top of the main branch should pay attention to the topping and reduce the competitiveness of the main branch and the nearby branch to the central main branch.
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