The releases of metal elements Al

Mn and Fe appeared phase characteristics

but the phase characteristics were very different among various soils. In most cases

the release processes of Al

Fe were very similar. The relation between cumulative release amount of the three metal elements can been described with Q=A B_1H B_2H~2. After simulating rainfall of 9 150~10 650 mm

compared with the control

pH4.5 acid rain enhanced cumulative release amount of Al 8.16%~87.49%

Mn -4.29%~24.75%

Fe 5.78%~86.03%. pH3.5 acid rain enhanced cumulative release amount of Al 68.59%~158.60%

Mn 26.11%~205.53%

Fe 8.48%~(138.88)%. The sensitivity of metal elements release to acid rain was Al>Fe>Mn. There was a similar characteristic of cumulative release of the three metal elements: the release amount of Al was close to the release amount of Mn

and was far bigger than that of Fe.