Investigation of interactive effects of acid fogand ozone on spruce seedlings

Ozone and acidic fog are considered as two important factors to cause forest decline. In this study ,laboratory experiment was carried out to simulate the effects of rnountainous air pollution on spruce seedlingsat high altitude with high content of ozone and high acidity of fog. Three aspects of analysis were performed :nutrient contents in needles : nutrient contents in washout solutions; epicuticular wax structure before and af-ter exposure. All the results of three aspects were combined to interpret the effects of ozone and acid fog.