为探明残膜对番茄光合特性的影响，并为含残膜土壤建立番茄光合模型提供依据，研究共设置5个残膜量水平0 kg/hm²（T1）、200 kg/hm²（T2）、400 kg/hm²（T3）、800 kg/hm²（T4）、1 600 kg/hm²（T5）进行大棚小区试验并测定不同残膜水平下番茄叶片光合速率、气孔导度、SPAD、含水率等参数，采用相关分析与通径分析的方法对所测数据进行处理并建立相关回归模型。在逐时尺度上，地温呈“S”型曲线变化，且地温随残膜量的增加而增加。叶片光合速率受残膜量影响较明显，各生育期内光合速率最大值出现在残膜量为400~800 kg/hm²时；完整生育期各处理叶片气孔导度表现为下降趋势，开花坐果期与成熟期200 kg/hm²处理气孔导度显著高于其余处理；叶片SPAD表现为先降低、后增加，并在果实膨大期达到峰值。叶片光合速率与气孔导度、SPAD、相对湿度、地温、平均含水率呈现显著相关性，残膜量与平均含水率显著相关。经通径分析，影响叶片光合速率的直接主导因素由大至小分别为气孔导度（0.671）、地温（0.198）、平均含水率（0.169），残膜主要依靠改变土壤含水率与地温间接影响光合速率。研究成果有助于进一步分析土壤含残膜情况下间接因素对叶片光合速率的影响，为全面认识残膜对作物生长影响提供一定参考。

In order to explore the influence of the residual film on soil moisture content and tomato photosynthetic characteristics and provide a basis for establishing a tomato photosynthetic model in soil with the residual film. The study sets up 5 residual membrane levels of 0 kg/hm² （T1）， 200 kg/hm² （T2）， 400 kg/hm² （T3）， 800 kg/hm² （T4）， 1 600 kg/hm² （T5） to conduct field trials and determine the differences at the level of residual film， tomato leaves photosynthetic rate， stomatal conductance， SPAD， water content and other parameters， the measured data are processed by correlation analysis and path analysis and a correlation regression model is established. The results show that on a time scale， the ground temperature changes in an S-shaped curve， and the ground temperature increases with the increasing amounts of the residual film. The maximum photosynthetic rate in each growth period occurs when the amount of the residual film is 800 kg/hm²； the stomatal conductance of leaves during the complete growth period shows a downward trend， with 200 kg/hm² in the same growth period. The stomatal conductance of the treatment is significantly higher than that of the other treatments； the SPAD of the leaves decreases first， then increases， and reaches the peak during the fruit swelling stage. Leaf photosynthetic rate is significantly correlated with stomatal conductance， SPAD， relative humidity， ground temperature， and average moisture content， and the amount of the residual film is significantly correlated with average moisture content. Through path analysis， the direct leading factors affecting leaf photosynthesis rate， from large to small， are stomatal conductance （0.671）， ground temperature （0.198）， and average water content （0.169）. Residual film mainly depends on changing the soil moisture content and ground temperature to indirectly affect the photosynthetic rate. The research results help to further analyze the influence of indirect factors on leaf photosynthesis rate under the condition of soil containing residual film， and provide a reference for a comprehensive understanding of the effect of residual film on crop growth.