Physiological and Ecological Responses of Cerasus campanulata planted in urban areas: Investigating the Causes of Declining Tree Vigor

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K14874
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 39070:Landscape science-related
• Research Institution: Tokyo University of Agriculture
• Principal Investigator: Kanazawa Yumiko 東京農業大学, 地域環境科学部, 准教授 (50572517)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: サクラ / 都市 / カンヒザクラ / 環境ストレス

Outline of Final Research Achievements

This study investigated decline factors in Cerasus campanulata and its cultivars planted in urban areas. In pot experiments, growth decline was observed under waterlogged conditions, but good growth was observed under drained conditions. Field surveys showed a negative correlation between soil gas phase ratio and growth decline factors, and a positive correlation between soil liquid phase ratio and growth decline factors. A positive correlation was also shown between soil surface hardness and decline factors, suggesting that soil conditions around the root system affect growth and that poor drainage negatively affects the growth of C. campanulata (and its cultivars). Analysis of seasonal variation in sugar content showed that C. campanulata may tolerate cold to some extent, but declining individuals tend to have lower sugar content. These results suggest the importance of good drainage conditions and winter low temperature measures in C. campanulata.

Free Research Field

造園植物学

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は、制限の多い都市の植栽環境において、カンヒザクラの生育に影響を与える要因を理解し適切な管理の一助となる。また、一連の調査によって衰退の指標として利用できる調査項目が示され、対照として用いた他のサクラ類に対しても応用ができる。これにより、都市におけるサクラの適切な種類選択と健全な育成に役立てることができる。