通径分析结果表明：根际高浓度的ＣＯ２是影响普通地膜覆盖番茄根、叶活力的主要因素。有孔地膜覆盖使土壤水气通畅，根际ＣＯ２浓度降低，进一步提高根系伤流量，增加叶片叶绿素含量，延缓了番茄早衰进程，从而促进了番茄早熟增产 The results of path analysis showed that the high concentration of CO2 in rhizosphere was the main factor affecting the root and leaf vitality of common plastic film mulching. The perforated plastic film mulching improved the soil moisture and air permeability, decreased the concentration of CO2 in the rhizosphere, further increased the root trapping and chlorophyll content in leaves, delayed the premature aging process of tomato, and promoted the early yield of tomato