Ancient trees refer to trees that are over 100 years old and can be divided into national first, second, and third grades. The first-grade ancient trees are old trees over 500 years old; the second-grade ancient trees are 300-499 years old; the third-grade old trees are 100-299 years old. The famous wood refers to the celebrities and leaders of Chinese and foreign dynasties that are rare in the tree species and have significant influence in history or society, or trees with extremely important historical, cultural value and commemorative significance. Mingmu is not classified by age or age.
Laws, regulations and documents such as the Forest Law of the People ’s Republic of China, the Urban Landscaping Regulations of the State Council and the Decision of the National Greening Commission on Strengthening the Protection of Ancient and Famous Trees have been issued successively, and various provinces, cities and districts across the country have also introduced Regulations on the protection of ancient and famous trees with local characteristics have further strengthened the protection measures for ancient and famous trees in the region.
The Regulations on the Protection of Ancient and Famous Trees in Anhui Province came into effect in March 2010
In February 2015, the Measures for the Protection of Ancient and Famous Trees in Hebei Province came into effect
The Regulations on the Protection of Ancient and Famous Trees of Guangxi Zhuang Autonomous Region came into effect in June 2017
Implementation of the "Protection Measures for Ancient and Famous Trees of Zhejiang Province" in October 2017
Implemented the "Provincial Measures for the Protection of Ancient and Famous Trees in Shandong Province" in July 2018
Corresponding management measures are issued in various places:
"Administrative Measures for the Protection of Ancient and Famous Trees in Changzhou City"
"Measures for the Protection of Ancient and Famous Trees in the Urban Planning Area of Lu'an City"
"Protection Methods of Ancient and Famous Trees in Wuxi City"
"Taiyuan Ancient Trees and Famous Trees Protection Regulations"
"Measures for the Protection of Ancient and Famous Trees in Benxi City"
"Measures for the Protection of Ancient and Famous Trees in Lhasa"
At the beginning of the growth of ancient trees, the site conditions were superior. The environmental conditions are relatively good. They are mostly grown in camps, gardens, temples, temples or yards, beside farmlands. The soil is deep, the soil is loose, the drainage is good, and the microclimate is suitable. However, after historical changes and a rapid increase in population, with the development of the economy and the improvement of people's living standards, many ancient trees are developed into tourist attractions, and more and more people travel. In addition, some ancient trees or peculiar postures, or have myths and legends, attract more tourists. Frequent car pressure and human treading cause the soil to be too tight and the permeability becomes poor, which limits the root extension and even causes the root system. Especially the absorption of massive root deaths. Secondly, due to the age of the ancient trees, during its long growth process, it is inevitable that it will suffer some man-made and natural damage and cause various disabilities. For example, the phenomenon of hollow trunk, broken skin, tree hole, death of main branches, etc., caused the imbalance of the canopy, the leaning of the tree body, and the weakening of the tree vigor, which caused diseases and insect pests. Other factors such as soil erosion, exposed roots, excessive pavement around the tree plate, soil pollution, malnutrition, excessive water, natural disasters, man-made damage, air pollution, man-made suppression, etc., together cause various kinds of ancient and famous trees Health problems.
Soil compaction The pavement around the root disk is too large
Excavation and transplantation Diseases and pests
The safety assessment of ancient and famous trees is an important part of their protection, and non-destructive testing is currently the most widely used technology for safety assessment. TRU tree radar wood detection technology, Picus 3 stress wave tree fault imaging technology, micro-drilling needle test technology It has been widely recognized at home and abroad, and has been widely used in ancient tree health assessment.
In addition, there are advanced technologies such as root distribution detection, annual ring analysis to determine tree age, crown width, site soil pH, compactness, physiological and ecological detection, and termite detection.
Dianjiangtech (www.Dianjiangtech.com) has been committed to providing advanced detection technology for the protection of ancient trees in China. After years of intensive development, it has provided continuous technical support for domestic ancient trees and garden protection units and reached strategic cooperation. Reached consensus on health inspection, risk assessment, rejuvenation and restoration, site protection engineering of ancient and famous trees, and has successfully implemented a number of ancient tree protection projects in Guangxi and Jiangxi. Welcome to consult.
Case 1: 550 years old camphor tree air rot detection
Approximately 20% of the severely damaged area inside the trunk of the ancient camphor tree, branched-in good condition
Case 2: 300 years of beak walnut fasting detection and treatment
The heights of 5.5m and 7.0m are severely damaged by about 55% and 40%. Later, consider adding brackets to protect
Case 3: Root distribution of ancient camphor tree, root restoration
· Within 7.5m distance from the tree (in the flower bed), there are more roots and few root systems outside the flower bed;
· The root system is mainly distributed in the depth range of 20cm to 100cm;
· Digging the rejuvenation ditch inside the flower bed, improving the soil, applying nutrient substances, and placing aeration and permeable pipes.