中文摘要：

利用田间小区试验研究了玉米/大豆套作（M/S）、玉米单作（M）、大豆单作（S）3种栽培模式下施磷对土壤磷吸附解吸特征的影响.结果表明：在不施磷处理下,M/S系统产量较M、S分别提高9.8%、79.1%,土地当量比为1.58;在施磷处理下,M/S系统产量较M、S分别提高10.4%、80.3%,土地当量比为1.62.与不施磷处理相比,施磷使M/S、M、S 3种栽培模式下的系统总产量分别提高12.7%、12.2%、17.6%.无论施磷与否,3种栽培模式下土壤最大缓冲容量（SBC）值均表现为M/S〉M〉S;但与施磷处理相比,不施磷处理下M/S、M、S栽培模式下土壤SBC值分别降低19.6%、30.3%、12.0%.各栽培模式在施磷处理下土壤单位吸附量的解吸量b值大小为M/S〉M〉S;与不施磷处理相比,施磷使M/S、M、S模式下b值分别增加10.9%、39.1%、-9.6%.土壤最大吸磷量（Qm）及土壤磷解吸率也表现出相同的趋势.

英文摘要：

Field plot experiment was carried out to study the effect of phosphorus application on soil phosphorus adsorption-desorption characteristics under three cropping patterns including maize/soy- bean relay intercropping （M/S）, maize monoculture （M）, and soybean monoculture （S）. Results showed that without phosphorus fertilization, the system crop yield under M/S was increased by 9.8% and 79.1% compared with that of M and S, respectively, and the land equivalent ratio （LER） was 1.58. With phosphate fertilizer application, the system crop yield under M/S was in- creased by 10.4% and 80.3% compared with that of M and S, respectively, and the LER was 1.62. The system crop yields under M/S, M and S with phosphate fertilizer application were increased by 12.7%, 12.2% and 17.6%, respectively, compared with that without phosphorus fertilization. Among three cropping patterns, the soil buffer capacity （SBC） values were in the order of M/S〉M 〉S regardless of phosphate fertilizer applied or not. The SBC values of M/S, M and S without phos- phate fertilizer application were reduced by 19.6%, 30.3% and 12.0% compared with phosphate fertilizer application treatments, respectively. The soil desorption per absorption （b） values of the three cropping patterns with phosphate fertilizer application were in the order of M/S〉M〉S, and the b values increased by 10.9%, 39.1% and -9.6%, respectively, compared with non phosphate fer- tilizer application. The soil phosphorus maximum absorption （ Qm ） and soil phosphorus desorption rate also showed the same trend.