Abstract: By simulating acid rain and dus- t fall under the condition of green -house, spinach and lettuce were given different trial treatments in pot planting experiments.The results showed that the contents of Cu, Pb, Cd, Cr in spinach and in lettuce increased with the pH value decreasing through single acid effect, and the contents had a significant nega - tive relationship with the pH value.The contents of Cu, Pb, Cd, Cr in spinach and in lettuce were higher than the control test through single dus- t fall effect. And two vegetables showed different trends with the same heavy mental through the compound effect.For example, the contents of Cu in spinach increased in earlier stage and decreased in later as the pH value decreasing, but the contents of Cu,Pb, Cd, Cr increased in lettuce?For different heavy mental, the same vegetable had different pH acute points through the compound effect, such as spinach, the acute point of both Pb and Cd was pH= 4,while the acute point of both Cu and Cr was pH= 5. Compared to the food hygiene standard of PRC, both single and compound effect made the contents of Cd far beyondthe level, even the most multiple of exceeding standard was 2.5, then followed by Cr and Pb the last Spinach was acuter than lettuce for the sensitivity of acid rain.

Key words: Acid rain, Dust, Vegetables, Heavy metals, Compound effect

CLC Number: 

• X513

• X517