The tree doctor has a physical examination of the soil in Daan Forest Park. The root of the banyan tree is only 40 cm.

Share160 + 111175Tweet4 EmailShares

Taipei Daan Forest Park is over 20 years old this year, but its head is not so strong. Last year, hundreds of trees fell after Typhoon Su Li. On the 12th of this month, the Friends of Daan Forest Park Foundation invited three Japanese "tree doctors" and Professor Zhang Wenliang of the Environmental Engineering Department of National Taiwan University to help with the "physical examination" of the park. Yesterday, the diagnosis and treatment report was released, because the backfill of Daan Forest Park was too solid during excavation and the geology was so strong that the roots of the trees could hardly take root. The root of the banyan tree, which could have grown to a depth of 1 meter, only grows less than 40 centimeters in the park. It is estimated that it will take 10 years and an investment of 300 million yuan to improve.

The soil is too hard and the root of the banyan tree is only 40 centimeters.

Taipei Daan Forest Park covers an area of nearly 26 square hectares and is known as the "Green Lung" of Taipei City. The Friends Foundation of Daan Forest Park, which was just established this year, yesterday held the "2014 International Symposium on Tree Protection with the Taipei City Government and the Forestry Experimental Institute of the Council of Agriculture-taking Daan Forest Park as an example to explore the prevention of natural disasters", because the Daan Forest Park, which has become an adult, is thin and small. Unlike the "forest" at all, it is often heard of falling down and breaking branches, affecting the safety of the people.

From the 12th to 16th of this month, the Taiwan team and the Japanese Street Tree Diagnostic Association conducted an unprecedented "whole body health examination" of Daan Forest Park, three Japanese tree doctors who specialize in root system, pruning, and dangerous tree assessment. through geological drilling and microclimate investigation, it is preliminarily found that excellent soil quality and high groundwater are the two major culprits for trees not growing up.

Zijiu Li Matsu, vice president of the Japanese Street Tree diagnosis Association, was surprised to find that the root system of the eggplant tree in Daan Forest Park was only 10 centimeters, almost only distributed on the lawn, and the water did not discharge a day and a half after the rain. The roots of camphor trees and green oak are only 10 centimeters. Zhang Wenliang, a professor in the Department of Biological and Environmental Systems Engineering at National Taiwan University, diagnosed that the roots of banyan trees more than 5 meters high in the park were only 20 to 40 centimeters high.

The Japanese Street Tree diagnosis Association has monitored that under natural conditions, banyan trees in Okinawa can go straight down to 1.3 meters deep; and normal banyan trees should grow fatter and fatter, while banyan trees in Daan Forest Park grow thinner and taller because the density of the trees is too high. I had to keep growing up when I couldn't get sunlight.

Li Matsu revealed that at first, he used manual digging, but the geology was so hard that he had to use an electric drill; when the soil air was too hard, the root system had to grow to the side, or even develop upward, so that he could barely survive, but if there was no rain for a few days and there was no water on the ground, the trees were easy to dry up and die. And this problem exists not only in Daan Forest Park, but also in the soil near buildings in Taipei.

The Friends of Daan Forest Park Foundation invites tree experts from the United States, Singapore and Japan to work together for the health examination of Daan Forest Park. The site was full and attracted more than 300 people (Photo / Lin Huizhen)

Share160 + 111175Tweet4 EmailShares