Abstract: Tongling is a multiple-industry city, where has a serious acid deposition problem. The harm and effect of acid deposition to forest were studied in this paper. By experiment and stem analysis on Pinus massoniana, it was found that leaf area, percentage of green needles, pHvalue of leaf cells, and content of chlorophyllin in affected region were lower than that in cleaner region. The results also showed that acid deposition lowered the mean annual increment and current annual growth rate of diameter at breast height, tree height, and volume of the species. Studies revealed that acid deposition damaged photosynthesizer so that the growth rate of the species was reduced.

Key words: LANDIS, evergreen broad-leaved forest, natural succession, dominant species, landscape.