对5种丛生竹叶片的光响应参数进行测定，并利用4种光响应模型进行数据拟合。结果显示：4种模型的拟合曲线与实测曲线较为接近，R²值为0.92~0.99，表明4种模型的拟合程度均较高。不同模型对最大净光合速率（Pmax）、光饱和点（LSP）、光补偿点（LCP）和暗呼吸速率（Rd）的拟合结果存在差异，其中，采用直角双曲线修正模型，5种丛生竹的Pmax拟合值与实测值最接近，而采用其他3个模型，5种丛生竹的Pmax、LSP、LCP和Rd拟合值大多与实测值存在一定差距。4种模型中，直角双曲线修正模型的拟合效果总体较好，可作为丛生竹的最优光响应曲线拟合模型。

The light response parameters of leaves of five sympodial bamboo species were measured， and the data were fitted with four light response curve models. The results show that  the fitting curves of four models are close to the measured curves, the R² values are 0.92-0.99， indicating that the fitting degrees of four models are all relatively high. There are differences in fitting results of different models on maximum net photosynthetic rate （Pmax）， light saturation point （LSP）， light compensation point （LCP） and dark respiration rate （Rd）， in which， the fitting values of Pmax of five sympodial bamboo species are all closest to the measured values by using modified rectangular hyperbola model， while Pmax， LSP， LCP， and Rd of five sympodial bamboo species have certain differences between the fitting values and the measured values when using the other models. The fitting effect of modified rectangular hyperbola model is the best among four models， which can be used as the optimal light response model for sympodial bamboo.