China News Agency, Lhasa, May 8 (Reporter Ran Wenjuan) The reporter learned from the Forestry and Grassland Bureau of Medog County, Tibet Autonomous Region that Green Village, Beibeng Township, in Medog County recently recorded a Bhutanese pine with a height of 76.8 meters. It has set the previous record for the tallest tree in China and is currently the tallest tree known in mainland China.

  In April 2022, entrusted by the Forestry and Grassland Bureau of Medog County, the research group of Lu Zhi and Guo Qinghua of Peking University, the Xizijiang Ecological Conservation Center, the Shanshui Nature Conservation Center and Beijing Digital Green Earth Technology Co., Ltd. formed a joint investigation team. Investigate Bhutan pine in Medog.

The joint survey team used a UAV lidar system to conduct large-scale mapping and found 11 giant trees potentially taller than 70 meters.

Then the investigation team carried a backpack lidar into the forest hinterland to conduct detailed mapping of 11 giant trees.

  It is understood that lidar is the most advanced tree height measurement at present, especially the measurement of super tall trees is safer and more accurate than the use of altimeter and manual climbing measurement.

In this survey, a combination of UAV and backpack lidar was used to obtain 3D point cloud models of 11 giant trees potentially taller than 70 meters, and then to accurately measure the height, 3D structure and growth environment of these giant trees .

  After a 10-day field investigation, data collection and processing, the giant Bhutanese pine tree with a height of 76.8 meters was finally discovered, which has refreshed the current record for the tallest tree in mainland China.

The research team obtained fine 3D point cloud data of the tallest tree, and used drones to obtain photos to stitch them into a photo of the giant tree.

The measurement team also used methods such as drone suspension measurement rope and tape measurement to verify height and diameter at breast height and record detailed data.

  According to the data, Bhutan pine is a narrow distribution tree species only distributed in the Eastern Himalayas, and its main distribution range is the mountain rainforest and subtropical climate regions at an altitude of 1400-2500 meters.

Li Cheng, head of the Xizijiang Ecological Conservation Center, introduced that on this 76.8-meter Bhutan pine tree, he found the peach of the juniper, the ear-lip orchid, the eye-spotted fritillary, the stolon, the bilberry, A variety of epiphytic protected plants and endemic plants of Medog, such as small pointed-leaf bilberry and medium-sized radish, further confirmed that the Medog and Brahmaputra Grand Canyon areas where they are located have extremely high conservation value and cultural significance.

  It is understood that in this investigation, the research team found a total of 8 giant trees with a height of more than 70 meters in Green Village, Beibeng Township. The area fully reflects the authenticity of the forest ecosystem in the Brahmaputra Grand Canyon.

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