摘要
对Ｂａｌｌ等的气孔模型所依据的实验事实之一（净光合速率与气孔导度呈线性关系）作了只考虑各阻力与总通量之间关系的电学类比分析和模拟检验。从电学类比分析得到的关系式可以看出，净光合速率与气孔导度的关系是非线性的，只有当叶片的边界层导度比较大时，两者的关系才接近线性。模拟得到的结论也是一样的。另外还模拟了气孔内外ＣＯ２ 浓度之比随光强的变化以及边界层导度的影响。
The hypothesis about the linear relationship between net photosynthetic rate and stomatal conductance, which had formed the basis of the empirical model proposed by Ball et al, was analyzed by analogy with electrical resistance and simulation testing. The results showed that the relationship between stomatal conductance and net photosynthetic rate was non linear, but approaches a linear one when there was a large the boundary layer conductance of leaf. In addition, the way in which the ratio of CO 2 concentrations in and out of the stomata changes with light and the influence of boundary layer conductance on the ratio had also been simulated.
关键词
气孔导度
光合速率
数学模型
Stomatal conductance
Photosynthetic rate
Matematical model
Electrical analogy
Boundary layer conductance
