摘要
以新疆南部典型绿洲城市——阿克苏市主要行道树法国梧桐（Platanus×acerifolia）、圆冠榆（Ulmus densa）和桑树（Morus alba）作为观测对象,分别测定城市不同功能区3种树种洁净叶片和蒙尘叶片的净光合速率（Pn）、气孔导度（Gs）和蒸腾速率（Tr）等气体交换参数,运用相关性分析和回归分析等方法,对比分析了植物叶面滞尘对叶片气体交换强度的影响,探明了叶面滞尘量与气体交换参数损失率的关系。结果表明：城市不同功能区同一个树种叶片气体交换能力有明显区别,由大到小的顺序表现为清洁区、居住区、工业区;同一个功能区不同树种叶片气体交换参数差异显著（p〈0.05）;不同绿化树种洁净叶片气体交换参数明显大于蒙尘叶片;树种叶片气体交换参数变化率与叶面滞尘量之间存在正相关关系,相关系数为0.909 1-0.998 2;植物叶片的气体交换参数损失率随叶面滞尘量的增加而增大。
We selected three urban greening tree species including Platanus×acerifolia,Ulmus densa and Morus alba in different functional areas of typical oasis city Aksu and measured their net photosynthetic rate（ Pn）,stomatal conductance（ Gs）and transpiration rate（ Tr） between clean leaves and dust born leaves of each tree species. We studied the influence of foliage dust to gas exchange intensity of tree leaves by using regression and correlation analysis,and ascertained the relationship between dust retention capacity and the loss rate of gas exchange parameter. The leaf gas exchange performance of the same greening species in the different functional area are significantly different. Leaf gas exchange parameters of different tree species in the same urban functional areas are obviously different（ p〈0.05）. Gas exchange parameters of clean leaf are higher than that of the dust born leaf among three tree species. There is a positive correlation between the loss rate of gas exchange parameters and dust retention capacity with thecorrelation index 0.909 1-0.998 2. Loss rate of gas exchange parameters of tree leaves increases with the increase of foliage dust amount.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2015年第11期28-31,共4页
Journal of Northeast Forestry University
基金
国家自然科学基金项目(31270742)
德国大众基金会(Volkswagen Foundation)EcoC AR项目(Az.:88497)
关键词
绿洲城市
行道树
叶面滞尘
叶片气体交换
回归分析
Aasis cities
Street trees
Foliage dust
Leaf gas exchange
Regression analysis
