【摘要】 分层采集鄱阳湖近水滨岸土壤进行磷的吸附动力学及等温吸附试验,探讨不同位置滨岸土壤的总磷（TP）含量及其对磷吸附解吸特性的差异。结果表明:不同滨岸带土壤TP差异极显著（F=7. 103,p <0. 01）,赣江入湖口滨岸土壤总磷含量显著高于其他滨岸土壤,且0～20 cm土层TP含量(635 mg·kg^-1)>20～40 cm土层(393 mg·kg^-1)。各滨岸土壤的磷素动力学过程相似:即分为"快速吸附（0～2 h）"、"缓慢吸附（2～24 h）"与"吸附平台（> 24 h）"3个阶段,平衡吸附量（Q_e）最大值为216. 0 mg·kg^-1; Langmuir模型对磷的等温吸附拟合度为0. 951～0. 995,表层土壤最大吸附量(Q_max)高于下层土壤,饶河(629. 12 mg·kg^-1)吸附量最大,康山大堤(340. 72 mg·kg^-1)最小。滨岸表层土壤吸附解吸平衡浓度（EPC0）小于0. 1 mg·L^-1,磷流失风险较小,东部滨岸土壤对外源磷的缓冲能力优于西南滨岸土壤,最大吸附量与TP呈现极显著正相关。更多还原

【Abstract】 Riparian soils surrounding Poyang Lake were stratified collected for phosphorus adsorption kinetics study and the experiment of isothermal adsorption. The results of this experiment were then analyzed and fitted. It shows that,the concentrations of soil total phosphorus from different riparian zones varies greatly（ F = 7. 103,p<0. 01）. The content of total phosphorus in riparian soil of the Gan River entrance is significantly higher than those of other riparian soils. Meanwhile,total phosphorus content of at the 0 ～ 20 cm depth( 635 mg·kg^-1) is higher than that at the 20 ～ 40 cm depth( 393 mg·kg^-1). Phosphorus adsorption kinetics in different riparian soils have similar trends. During 0 ～ 2 h,soils quickly adsorbed the phosphorus in the solution; during 2 ～ 24 h,the adsorption of phosphorus in soils decreased; after 24 hours,the tendency of phosphorus adsorption gradually flatted. The maximum value of equilibrium adsorption capacity（ Qe） is 216. 0 mg · kg^-1. The isothermal adsorption fitting degree of Langmuir model for phosphorus is 0. 951 ～ 0. 995,which indicates that the maximum adsorption capacity( Q_max) of surface soils is higher than that of the subsurface soils. Soils from the Rao River entrance have the largest amount of adsorption( 629. 12 mg · kg^-1),while soils from the Thornhill have the smallest amount of adsorption( 340. 72 mg · kg^-1). The equilibrium phosphate concentration（ EPC0） of the surface soils in the riparian of Poyang Lake is less than 0. 1 mg·L^-1. So the risk of phosphorus loss is small. The buffering capacity of exogenous phosphorus in the eastern riparian soils is better than that of the southwest riparian soils. Last but not least,the maximum adsorption capacity is positively correlated with TP.更多还原