二氧化碳是光合作用的原料。环境中CO_2供应是否充足,对作物的光合和产量有很大的影响。晚茬麦地膜覆盖栽培,改善了小麦赖以生存的环境条件,特别是膜下CO_2浓度的变化,对小麦的正常生长发育至关重要。因此,探讨覆膜麦膜下CO_2浓度的变化规律,对晚茬麦高产理论研究具有重要意义。 Carbon dioxide is the raw material for photosynthesis. Whether the supply of CO 2 in the environment is sufficient will have a great impact on crop photosynthesis and yield. The cultivation of wheat straw in the late cropping season improves the environmental conditions for the survival of wheat, especially the change of the CO 2 concentration under the film, which is of vital importance to the normal growth and development of wheat. Therefore, it is of great significance to study the variation law of CO 2 concentration under plastic film mulching.