干旱区绿洲城市园林绿化树种滞尘效应及耐尘机制研究

对于干旱、多风沙的新疆南部绿洲城市而言，沙尘是影响城市人居环境的重要污染物之一。选择滞尘效率高、耐尘能力强的适地园林绿化树种并合理配置，是改善绿洲城市人居环境进程中亟待解决的科学问题。本项目以新疆南部典型绿洲城市- - 阿克苏市为研究区，根据多度频度选择有代表性的乡土、外来绿化树种，基于城市生态学、植物生理生态学和景观园林学等学科原理和方法，以绿化树种与沙尘污染的相互作用为研究主线，野外观测和实验室测试相结合，测定树木的滞尘量及其时空变化，探明叶片形态、生理和生态指标对沙尘的响应，分析叶片特性及其与滞尘能力的关系，对比研究所选树种的滞尘和耐尘能力并加以排序，初步筛选出滞尘效果好、抗风沙能力强的适地树种，最终阐明干旱区园林绿化树种滞尘效应与耐尘机制。本项目将会完善干旱区城市绿化树种选配的判定指标体系，优化城市绿化方案与管理，为干旱区绿洲城市人居环境的改善与城市生态建设提供理论依据。

Dust aerosol as an important pollutant in arid oasis cities in Southern Xinjiang reduces the living quality of settlement environment. How to improve the urban habitat environment by selecting and allocating urban trees with high dust-retention and dust-resistant capacity is a key scientific problem to be solved. In this research project, we take one of the typical oasis cities－Aksu as study area, according to abundance and frequency of urban greening trees, choose several types of native and exotic species as our study objects. Based on the scientific principles and methods of urban ecology, plant eco-physiology and landscape architecture, quantitative analyze the dust accumulation and dust-resistant capacity of different tree species by measuring its morphological and eco-physiological parameters with combination of field observation and laboratory processing; further determine suitable tree species for future urban greening in arid region. The results of this project can be a supplement for index system of selecting urban greening trees, optimize present urban greening practices，provide a theoretical basis for urban ecological construction and improvement of settlement environment in arid land oasis cities.