杨树叶面积和光合速率差异研究

通过对4种杨树树体不同功能叶片(不同部位、不同方位、不同叶位)叶面积和光合速率差异进行的研究,结果表明:杨树不同方向叶片,光合速率差异表现为南>东>西>北,叶片面积及规律相同。同一枝条上不同部位叶片的光合速率的最大值均出现在中间部位。同一枝上叶面积均呈现波浪形变化。4种杨树在同一时间内测定的不同叶位叶片叶面积呈现出倒一叶<倒二叶<倒三叶的规律。

Difference of Photosynthetic Rate in Leaf Area of Poplar

The leaf area&photosynthetic rate of the leaves with different functions of the tree body were studied,that is,the leaves with different parts,different directions and different leaf positions.Result shows that the photosynthetic rate of poplar leaves in different directions is different in the south>east>west>north>,and the leaf area and law were the same.The maximum photosynthetic rate of the functional leaves in different parts of the same branch appear in the middle part.The leaf area of the same branch show wavy changes.The maximum photosynthetic rate of the functional leaves in different parts of the same branch appeared in the middle part.The leaf area of the same branch showed wavy changes.The photosynthetic intensity of leaves in different leaf positions of the four poplars was measured at the same time.The experimental result shows that the leaf area showed the rule that the flag leaf