Abstract:

To ascertain the general growth and health conditions of Pinus tabuliformis in the Museum of Chinese Gardens and Landscape Architecture and timely and accurately identify the existing problems and potential hazards of tree health can provide reference for implementing emergency measures, adjusting and formulating means and long-term scheme of rejuvenation and maintenance of the trees. The basic growth and health indexes, the score of health, and the health classification and assessment of the whole 79 Pinus tabuliformis in the garden were systematically studied. The results showed that a majority of the trees assessed were in good health, no tree was classified as weak or particularly weak grade. There were 9 trees at medium health level, accounting for 11.39% of the total. The number of trees at good and excellent level was 63 and 7 respectively, accounting for 79.75% and 8.86% of the total. The health status of P. tabuliformis on site condition of flat land and gentle slope was better than that on site condition of upland. The symptoms of crown and trunk of the trees, especially the branch and leaf pests and diseases, leaf spot or discoloration and trunk borer and disease, were the most primary factors leading to the deterioration of tree vigor and health score. High attention should be paid to the threats and impacts caused by pests and diseases, which can lead to the vitality decline of the trees. Based on the occurring regularity of pests and diseases, integrated prevention and control measures should be established. Besides, with the goal of improving the site condition of the trees, scientific and elaborate maintenance and management measures should be carried out to enhance the tree vigor and health condition. Health record should also be set up to monitor and inspect the growth conditions of the trees regularly.

Key words: Pinus tabuliformis, tree health, assessment index, diagnosis of tree weakness, rejuvenation