With its unique ecological balance function and environmental protection function, landscape tree species have an irreplaceable important status in the construction of modern civilized society. In the current stage of China's agricultural industrial structure adjustment, it has increasingly demonstrated vigorous development. In landscaping, it is necessary to correctly select excellent resources for landscaping tree species and apply it to local production arrangements or garden projects in order to maximize the economic and ecological benefits and to avoid the confusion and blindly follow the trend. First of all, it is important to select tree species suitable for cultivation according to the local climate and environmental conditions, especially in new development areas where economic and technical conditions are relatively weak. Taking most of China's temperate regions as an example, the newly recommended deciduous tree species include arborvitae, melissa, camphor, weeping twig, golden weeping willow, lacking maple, southern acid jujube, yellow magnolia, and red luck. Qiao Yulan, purple magnolia, Huangshan banyan, eucalyptus, etc., shrubs have mosaic brocade, ramie, horticultural eight immortals, seashore hibiscus, safflower big leaf Buddleja and so on. Cold-tolerant and evergreen tree species, arborous species: Tianmugui, Duyingshan, Xiaoshanxiaoxiao, Lechanganxiaoying, Adingfeng, Nongxiangui, Shenshuiyu, etc., shrubs include jasmine, Phnom Penh, Ligustrum lucidum, flame Nantianzhu, Maoshu, Zijin, Peacock and other. Second, according to the local conditions of the soil environment to choose suitable for production and cultivation of tree species, for example, rhododendron, camellia, safflower, gold privet, mizuli, magnolia, Eucommia, cycad, wolfberry fruit, such as acid-sweet earth tree species, Suitable for soils with a pH of 5.5 to 6.5 and containing a large amount of iron and aluminum. The alkalescent soil species such as Cyclovirobuxine, palm, acacia, crape myrtle, ginkgo, eucalyptus, peach, coral, oleander, Pittosporum, Amaranthus are suitable for soils with a pH of 7.5 to 8.5 and containing more calcium. In the case of salty soils containing soluble salts such as sodium chloride and sodium sulfate, or sodium carbonate and heavy carbon soils, it should be selected from black pine, North American cypress, tamarisk, scutellaria, cycas Ligustrum lobata, fig, eucalyptus, vitex, amorpha, Populus euphratica, pomegranate, sea buckthorn, Nitraria spinosus and other tree species. Third, it is necessary to rationally arrange production and cultivation sites and greening use sites based on the demand intensity of tree species for solar illumination. For example, tropical and subtropical tree species growing in low latitude and rainy areas in the south of China have lower requirements for light intensity than deciduous trees in the high northern latitudes. Most of the tree species native to the edge of the forest or in open areas are light-loving species, such as peach, plum, plum, apricot, poplar, acacia, platanus, larch, larch, etc. in deciduous trees; The leaves of Evergreen are evergreen tree species with pine, cedar, pine needles, cypress, oriental arborvitae, and cypress. Among the evergreen broad-leaved species, jujube, white magnolia, ginkgo, eucalyptus, eucalyptus, eucalyptus, sapindaceae, eucalyptus, camphor, osmanthus, and clove are also light-loving species. Among the evergreen broad-leaved species, Nantianshao, Cyclovirobuxine, Camellia, Coral Tree, Octagonal Golden Plate, Mahonia, Pittosporum, Rhododendron, Cinnamon, Phyllostachys edulis, Palmetto, Palm, etc., and most coniferous species with flat, scaly leaves Such as camphor, spruce, yew, Podocarpus, Luo Hanbai, etc., are mostly shade-tolerant tree species, their branches are generally more dense, and the growth rate is slower. Shrub-like shade-tolerant tree species can be planted and interplanted with tree-like hi-light trees in production and cultivation to increase land use area and increase economic efficiency. In the application of landscaping, it can be used as a undergrowth arrangement, and is particularly suitable for planting under shaded areas such as under the viaduct and behind high-rise buildings, so as to exert unique physiological advantages, enrich the level space of landscaping, and improve the environmental and ecological benefits. .
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