- Related Topics:
- forestry
- Agricultural sciences
- crop production
- silviculture
arboriculture
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What is arboriculture?
Arboriculture is the cultivation of trees, shrubs, and other woody plants for shading and decoration. It involves various practices such as propagating, transplanting, pruning, fertilizing, and pest control. Arborists also diagnose and treat tree damage, arrange plantings for ornamental purposes, and remove trees. The main focus of arboriculture is the well-being of individual plants, unlike silviculture and agriculture which focus on the welfare of large groups of plants.
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How is arboriculture different from regular agriculture?
Arboriculture focuses on the health and well-being of individual trees, shrubs, and woody plants for shading and decoration. It involves various practices such as transplanting, pruning, pest control, and wound treatment.
In contrast, agriculture is concerned with the welfare of a large group of plants as a whole, focusing on cultivating soil, producing crops, and raising livestock. While arboriculture emphasizes the ornamental value and individual care of trees, agriculture deals with the broader cultivation of plants for food and other products.
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What types of trees are commonly cared for in arboriculture?
Arboriculture focuses on the health and well-being of individual trees and woody plants, rather than managing large groups like in agriculture or silviculture. Arborists care for various trees, including fruit trees like apple, pear, and cherry, as well as trees and shrubs grown for ornamental purposes. Their work involves a range of practices, such as transplanting, pruning, and pest control, to maintain plant health and appearance.
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Why is pruning important in arboriculture?
In arboriculture, pruning is essential for removing superfluous or detrimental plant parts, enhancing health, and improving aesthetics. This horticultural practice enhances flowering and fruiting, shapes plants, and stimulates new growth.
Incorrect pruning can weaken plants and increase vulnerability to pests. Skilled tree surgeons address damage from various sources, such as ice or wind, by removing compromised branches, improving air circulation and light exposure, preventing wounds, and revitalizing aging trees. Pruning is also done to maintain a balance between flowering and leaf surface, and to allow for efficient spraying and harvesting.
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What challenges do arborists face when caring for urban trees?
Urban arborists face several challenges in caring for trees. Urban forests, which include trees in greenbelts, streets, and residential areas, require specialized care due to their high value.
Some common issues include:
* Pruning Incorrect pruning can lead to flower and fruit loss, weakening the tree and making it susceptible to diseases and pests.
* Air Pollution Air pollution from automobiles and industry can harm urban trees, leading to respiratory issues.
* Plant diseases Fungi, bacteria, and viruses can cause various tree diseases, requiring specific control methods.5 Britannica SourcesCreated from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles. -
How does arboriculture help the environment and cities?
Arboriculture, the cultivation of trees and shrubs, greatly benefits both the environment and urban areas. Urban forestry, a branch of forestry, focuses on managing trees in urban settings like greenbelts and residential properties.
Arboriculture enhances the environment by improving air quality, reducing the effects of climate change, and supporting biodiversity. In cities, trees offer shade, lower temperatures, and improve the aesthetic appeal of neighborhoods. Skilled professionals in arboriculture address the specific needs of urban trees, acknowledging their increased value compared to rural trees, and provide specialized care to ensure they thrive.
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arboriculture, cultivation of trees, shrubs, and woody plants for shading and decorating. Arboriculture includes propagating, transplanting, pruning, applying fertilizer, spraying to control insects and diseases, cabling and bracing, treating cavities, identifying plants, diagnosing and treating tree damage and ailments, arranging plantings for their ornamental values, and removing trees. The well-being of individual plants is the major concern of arboriculture, in contrast to such related fields as silviculture and agriculture, in which the major concern is the welfare of a large group of plants as a whole.
The basic principles and objectives of arboriculture are of ancient origin. Early Egyptians transplanted trees with a ball of earth and originated the practice of shaping the soil around a newly planted tree to form a saucer to retain water, both still practiced. About 300 bc the Greek philosopher Theophrastus wrote Peri phytōn historia (“Inquiry into Plants”), in which he discussed transplanting of trees and the treatment of tree wounds. Virgil’s Georgics portrays Roman knowledge of tree culture. The English horticulturist John Evelyn, in his Sylva, or a Discourse of Forest-trees, and the Propagation of Timber (1664), offered advice on pruning, insect control, wound treatment, and transplanting.
Trees or plants may be propagated by seeding, grafting, layering, or cutting. In seeding, seeds are usually planted in either a commercial or home nursery in which intensive care can be given for several years until the plants are of a size suitable for transplanting on the desired site. In soil layering, the shoots, or lower branches of the parent plant, are bent to the ground and covered with moist soil of good quality. When roots have developed, which may require a year or more, the branch is severed from the parent and transplanted. In an alternative technique, air layering, the branch is deeply slit and the wound covered by a ball of earth, moss, or similar material. The ball, enclosed in a divided pot supported from underneath, or in a sturdy paper cone, is kept moist. As in soil layering, the branch is severed and transplanted after roots have developed. Root cuttings can be used for propagating trees that do not normally produce roots from stems. Tree species such as willow and poplar that sucker, or send up shoots readily, are usually propagated from stem cuttings. Cuttings are made from deciduous plants during dormancy, preferably from the terminal growing shoots of the current season. Pieces 6 to 10 inches (15 to 25 centimetres) long with two or more buds are tied in bundles and stored in damp sand or moss for callus formation before planting in prepared beds. Root formation may be stimulated by application of growth-promoting chemicals or growth hormones.
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In treating tree-trunk wounds in which large areas of bark are torn away, the bark around the wound is trimmed back to sound tissue and, at the top and bottom of the injury, trimmed to form a pointed ellipse of the wound area. The exposed wood is covered with wound dressing material, protecting it from wood decay fungi.
Flexible cables (guys) or rigid braces are used to support recently transplanted trees until the roots become established, or to lessen the danger that a tree with a weakened root system will be blown over by the wind; bracing is also used to support unduly long or heavy branches, to prevent splits developing at branch forks, or to permit healing of splits already developed.
Cavities in trunks, caused by decay-inducing fungi, may be treated with antiseptic dressing and left open, with drains installed at the bottom, or filled with concrete or other material after removal of the decayed wood. See also graft; pruning; transplant.