In order to save a thousand -year -old ginkgo tree, Yangzhou has not loosened for 40 years, and has "opened four times a year"

After a rare high temperature some time ago, many new -planted ginkgo leaves in Yangzhou City withered and dropped, and their vitality was injured. In the center of the Bubu City, the Shita Temple in Wenchang Middle Road, and the center of Tonglu Avenue, a Tang Dynasty ginkgo with a history of more than 1,000 years was hardly affected by extreme weather. According to the city's Housing and Urban Construction Bureau's greening experts, this is due to Yangzhou's attention to the protection of the famous trees including this millennium ginkgo, to ensure that they have a healthy physique and resist the invasion of the abnormal environment. On the 1st, Yangzhou Urban Construction Expert Zhu Yanwei was found to find several documents 40 years ago and told reporters that the unforgettable past for the millennium ginkgo consultation, and the expert group had four meetings a year in a year.

The early withering millennium ginkgo affects everyone's heart

Native

In 1981, many citizens who walked from the Tang Dynasty ginkgo found that the leaves of millennium trees were yellow and early fallen leaves, and early withering. The "sick" Tang Dynasty ginkgo attracted the attention and attention of citizens and relevant departments.

After discovering the problem, the Yangzhou Science and Technology Association organized experts to "consult" for ginkgo. On March 26, 1982, the Municipal Science and Technology Association proposed five protection measures in the "Report on the Research on the Inspection of Ginkgo of the Tang Dynasty", which was implemented by the Municipal Management Office. After that, professionals implemented a loose soil, building high -speed rail railing, hormones at the roots, and drilling the water content and pH value of sample test soil around the ancient trees. The fifth measure to change the road structure on both sides of the ancient tree, because the funding was not implemented and did not carry out.

According to reports, according to the opinions of the city leaders, on September 15 of that year, the Municipal Science Association and the Municipal Management Office once again invited relevant experts for special research. The research association was chaired by Fang Mingxue, then vice chairman of the Municipal Science and Technology Association, and invited Cao Kan and Professor Xu Xiaobai, Professor Xu Xiaobai, Lecturer of the Turkquanity Experts, Jinsheng Engineers of the Garden Management Office, Zhu Haowei and Gaodeshan Engineers, and Municipal Management. Xu Bingyan waited for the meeting. The experts at the meeting emphasized the significance of protecting the ancient trees, and agreed that it was the symbol of historical and cultural cities and witnesses, and attracted the attention of domestic and foreign. For example, the delegation of the architects of Geneva, Switzerland, appreciate the practice of this ancient ginkgo 'careful maintenance management. It is believed that this generation of scientific workers must do everything possible to make this millennium ancient tree grow well.

Regarding the reasons for the decline of the growth of the Tang Dynasty, the personnel in the meeting believed that the protection measures had been effective. The growth of the spring and summer of 1982 was the result of the measures, and it would be continued in the future. After taking measures, the ancient trees are observed and determined from various aspects. The road structure on both sides is the main reason for the decline of ancient trees. Taixing Ginkgo is good for the sandy loam. Pen flowers are not as good as purple sand pots, and the purple sand pot is not as good as the tile pot. These fully illustrate the importance of soil breathability. The breathing of the ancient trees requires oxygen and carbon monoxide. Now the pavement is covered, the breathability is poor, the oxygen contains less, and the carbon dioxide is weakened. The maximum growth temperature of ginkgo is 39 ° C. The temperature of the asphalt pavement under the tree often reaches more than 40 ° C, which produces a large amount of radiation heat; the breathing effect of the canopy is accelerated, and the leaves fall early. The metabolism effect of ancient trees is not coordinated, the roots of the root system weaken, the crown breathing effect is accelerated, the physiological balance is lost, resulting in the growth of ginkgo trees.

It is understood that when the delegation of Geneva architects in Switzerland visited the Tang Dynasty ginkgo, it also put forward opinions on the pavement.

Experts open "prescriptions" for ancient trees

Native

At the research conference on September 15, 1982, the experts attended the "consultation" of ancient trees and proposed four protection measures.

The first is to change the road structure on both sides of the ancient tree is a key measure to protect the Ginkgo trees of the Tang Dynasty. Only in this way can the physiological balance of the breathability of the ancient trees be solved, prompting them to resume their vitality and grow normally. The second is to do a good job of greening and vertical greening around the ancient trees, improve the coverage of greening, reduce the heat of ground radiation, and reduce the temperature around the ancient tree. Third, the pavement should be sprinkled in summer, spraying in the air, and fertilizing the leaves to reduce the temperature, increase the humidity, and increase the nutrients. Fourth, in order to carefully do a good job of maintenance management, it is recommended to set up a specialized maintenance team to record the implementation of the ancient tree protection measures and the growth and changes of the ancient trees, and report it in detail to report to the relevant departments in a timely manner in order to take corresponding measures in a timely manner. Experts at the meeting also believe that civil defense work and asphalt pavement have a great impact on the ancient trees, and gradually consume nutrients. After taking measures, there is a process of growing up, and it is impossible to be "immediate." Opinions on changing the road structures on both sides of the ancient tree, experts recommend changing the original road surface, supplemented with stone, and pay attention to coordination with the style of the pavement and the style of the ancient city. It can be made into a fence -type pavement or a dental seam. Blind ditch or beam -column support can be set under the road. The road base is changed to soil and fertilized, and lime soil cannot be used.

Thousand -year -old ginkgo has been "conditioned" to restore vitality

Native

On November 6, 1982, the Municipal Science Association held a research meeting with the Municipal Management Office and once again studied the protection of the millennium ginkgo. This is the fourth meeting held by the ancient tree. Attack the meeting. In his speech, he proposed that the provincial, local, and municipal party committee leaders attached great importance to the protection of this millennium ancient tree, because it is a precious wealth left by history, a testimony of the ancient city of Yangzhou, and a special attraction of Yangzhou. It must not be allowed It was destroyed in the hands of this generation.

Regarding the problems of previous experts to improve the pavement around the ancient tree, Professor Xu Xiaobai, Professor Cao Kan, and Song Yucai of the Agricultural College spoke one after another, analyzed the reasons for the decline of the ancient tree, and explained the ginkgo in theory and soil test results. The status quo of the tree. "At the meeting, I used a brief picture to explain the relationship between the pavement of this ancient tree and the structure of the civil air defense work, and introduced the practice of the ancient trees in ancient Beijing. The intersection scheme of filling the stone can solve the breathability of the root of the ancient tree. "Zhu Yanwei, the deputy director of the Municipal Urban Construction Bureau, told reporters that at the meeting, it also studied the problems of avoiding the impact of underground water and noise vibration on trees.

According to the "prescription" issued by the experts, after several years of "conditioning", the ancient trees gradually recovered their vitality.

A series of ancient tree -famous wood protection mechanisms have formed

Native

"Tang, Song, Yuan, Ming and Qing, seeing the present from ancient times." This is a general summary of the ancient monuments on the east and west artery Wenchang Road in the city of Yangzhou. "Tang Dynasty Ginkgo has become the oldest 'Shouxing' on Wenchang Road. It is not only a witness to the development of the ancient city, but also a window for the protection results of the ancient city of Yangzhou. Experts introduced that in the process of protecting ancient trees such as the millennium Tang Huai and Millennium Ginkgo, Yangzhou has accumulated good experience and gradually formed a practical and effective protection mechanism. The above two ancient trees are examples. For a long time, some people have been "monitoring" on a regular basis. According to the indicator testing, they are "add meals" and "open small stoves" to ensure their normal growth.

The reporter learned that Yangzhou is currently actively creating a national ecological garden city. The relevant person in charge said that the city will further improve the ancient tree famous trees dynamic testing system, regularly test and evaluate the existing 678 ancient trees, establish "one tree, one gear", listing protection, clarifying the ancient tree named wood maintenance responsible unit Create good growth conditions for these green "living fossils". And the census, archives, and listing of famous wood reserve resources for more than 50 years (including 50 years) to ensure that the protection rate of ancient trees and reserve resources is 100%.

Member: Yangtze Evening News/Zi Niu Journalist Chen Yong

Correspondent: Jiang Jiawei

Edit: Zhao Tian

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