腐植酸氮、磷、钾复合肥(下称腐复合肥)的改土增产作用,已为不少农业科技工作者的研究所证明。但从土壤复合体性质变化来阐明腐植酸类肥料改良红壤的作用则较少见。为此我们从一九八○—一九八三年对红壤旱地进行田间试验,研究其增产作用和对土壤有机无机复合体性质的影响以探讨腐复合肥的改土机理。 Humic acid nitrogen, phosphorus and potassium compound fertilizer (hereinafter referred to as rotten compound fertilizer) to increase soil production, has been proved for many agricultural science and technology workers. However, the changes of soil complex to clarify the role of humic acid fertilizer to improve red soil is less common. To this end, we conducted a field experiment on soils of red soils from 1980 to 1983 to study their effects on yield enhancement and their effects on the properties of soil organic-inorganic composites so as to explore the mechanism of soil amendments.