The practice and discussion on rejuvenation techniques of ancient and famous woody plants at Shisanling Forest Farm

Through field investigations of 38 ancient and famous woody plants in the Ming Tombs Forest Farm, the causes of mountainous ancient tree decline were analyzed from three main aspects: physiological degeneration, natural environmental stress, and biological factor interference. This study identified challenges in revitalizing ancient trees in mountainous areas, and customized "one tree, one policy" rejuvenation plans. Targeted rejuvenation measures, including tree cavity repair, rejuvenation trench (pit) excavation, and cofferdam construction, were implemented. The study explores adaptive strategies for mountainous ancient tree rejuvenation and proposes a technical system for the Ming Tombs Forest Farm. The results demonstrate that, the open tree surgery combined with decay removal and sterilization can effectively delay trunk decay; rejuvenation trenches significantly enhance tree vitality by improving root environment; removal of root suckers promotes the recovery of main trunk.