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采用连续液流法研究了黄腐酸处理对５种黄土性土壤Ｈ＿２ＰＯ＿４￣（－１）吸附、解吸动力学性质及有效性的影响。结果表明：①黄腐酸处理对Ｈ＿２ＰＯ＿４￣（－１）吸附、解吸动力学模型的拟合性无影响，但能使Ｈ＿２ＰＯ＿４￣（－１）的吸附速度及吸附量分别降低１６．７％～６６．７％及１５．３％～６５．４％，解吸速度及解吸量分别增加１４．３％～９４．４％及１０．８％～８１．４％；②黄腐酸处理能使磷的有效系数降低３８．３％～７２．０％，Ｈ＿２ＰＯ＿４￣（－１）的有效性大幅度提高。黄腐酸对黄土性土壤Ｈ＿２ＰＯ＿４￣（－１）有明显的活化作用。
The effects of fulvic acid treatment on the kinetic properties and availability of H 2 PO 4 -1 adsorption and desorption in five loess soils were studied by continuous flow method. The results showed that: (1) fulvic acid had no effect on the fit of H 2 PO 4 -1 adsorption and desorption kinetic model, but the adsorption rate and adsorption capacity of H 2 PO 4 -1 decreased by 16.7% 66.7% and 15.3% ~ 65.4%, desorption rate and desorption rate increased by 14.3% ~ 94.4% and 10.8% ~ 81.4%, respectively; ② Fulvic acid treatment could make phosphorus The effective coefficient decreased by 38.3% -72.0%, the effectiveness of H 2 PO 4 ~ (-1) increased significantly. Fulvic acid had obvious activation on H 2 PO 4 ~ (-1) in loess soil.