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通过对新疆杨枝条不同部位叶片以及不同方位叶片光合速率变化的研究,结果显示,在不同方位功能叶片光合速率的比较中,表现为南部叶片光合速率最高,北部叶片光合速率最低,东部和西部叶片光合速率居中。新疆杨同一枝条不同部位功能叶片光合速率由枝梢顶部向基部呈现单峰曲线的变化,即枝条顶部和基部的光合速率相对较低,中部叶片的光合速率最高。
The results showed that the highest photosynthetic rate was in the southern leaves, the lowest was in the northern leaves, and the lowest in the leaves in the east and west leaves Photosynthetic rate is middle. The photosynthetic rate of functional leaves in different parts of Populus davidiana showed a single peak curve from the shoot tip to the base, that is, the photosynthetic rate at the top and the base of the shoots was relatively low while the photosynthetic rate at the middle leaves was the highest.