沙地云杉干旱适应的生态界面机理

Picea mongolica is endemic tree species in Inner Mongolia Autonomous Region, China. It is only found in ecotone in eastern area of Xiaotegeli sandy land. Its exist could supply enormous ecological benefits for construction of "Three-north" protection forest system and control of desertification. Professor Xiong Wenyu who is one of the famous forest ecologists proposed the concept of "ecoboundary" in 1985. Forest boundary ecology is a new sub-discipline of ecology. Ecoboundary is the thin matter layer between bio-system and environmental system. It is an active layer for matter exchange, energy flow, and information transition. In this project, we carried out the research on ecoboundary of Picea mongolica and indicate ecological process and mechanism of Picea mongolica that grow in semi-arid habitat to drought from modular level. This will be of great scientific theoretical significance and practical value for developing and perfecting forest boundary ecology, and extending new research area of plant physiological ecology. The main study contents are the following: (1) the relationship between water stress and Picea mongolica crown ecoboundary's structure, function and movement law. (2) The relationship between its physiological activities of crown and gradient of ecological factors. (3) The relationship between water stress and Picea mongolica root ecoboundary's structure, function and movement law. (4) The relationship between its physiological activities of root and gradient of ecological factors. (5) Forest ecotone, comparison between Picea mongolica forest and typical dark coniferous forest in Changbai Mountain. In this project, we carried out the research on coupling mechanism of Picea mongolica organ ecoboundary's structure, function, movement law and environmental factors. We also researched on the relationship between protection enzyme system and drought stress. We hope to establish theory system and study method of Picea mongolica boundary ecology, and supply scientific basis for conserving the rare Picea mongolica natural forest resources.

沙地云杉是我国特有树种，只分布内蒙古小腾格里沙漠东部边缘的固定沙丘上。通过对沙地云杉器官生态界面结构、功能、运动规律与环境因子耦合机制和保护酶系统与水分胁迫关系的研究，揭示特殊生境下生长的沙地云杉对干旱适应的生态过程和机理，建立沙地云杉界面生态学理论体系和研究方法，为保护和扩大珍贵的沙地云杉天然林资源提供科学依据。.