以湘南红壤为试材进行模拟试验。结果表明，土壤有机质的大量积累，对铝进行络合、吸附、使其活性降低，从而削弱铝毒。有机质的品质对固持铝的能力也有影响，腐殖质含量越高，高分子腐殖酸的芳构化程度越好，则对铝的固持能力越强。施用生理酸性化肥可使土壤对铝的吸附能力减弱。 Red soil in southern Hunan as a test material for simulation test. The results showed that a large amount of organic matter accumulates in soil, complexing and adsorbing aluminum, reducing its activity and weakening aluminum toxicity. The quality of organic matter also has an impact on the ability to retain aluminum. The higher the humic content, the better the degree of aromatization of the polymeric humic acid, the stronger the ability to retain aluminum. Physiological acid fertilizers can reduce the soil adsorption of aluminum.