The main reason is that the effectiveness of limestone is short-term, and the metal sulfide adsorbed on it is easy to desorb by long-term leaching and weathering, and then oxidized to produce acid again (Evangelou, 1995); in addition, as shown in the reaction formula (5) - (7), simulated rainfall may lead to hydrolysis of various potential acidity and release H +, thus reducing the treatment effect on acid soil.<br>
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