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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.
Field experiments were conducted to study the effects of phosphorus application on soil phosphorus adsorption and desorption under three cultivation modes of maize / soybean intercropping (M / S), maize monocropping (M) and soybean monocropping (S) The yield of M / S system increased by 9.8% and 79.1% compared with M and S, respectively, and the land equivalent ratio was 1.58. Under phosphorus application, the yield of M / S system was increased by 10.4% and 80.3 %, And the land equivalent ratio was 1.62. Compared with no phosphorus application, phosphorus application increased the total system output by 12.7%, 12.2% and 17.6% under M / S, M and S cultivation modes respectively. No, under the three cultivation modes, soil maximum buffer capacity (SBC) showed M / S> M> S. However, compared with phosphorus application, SBC values decreased by 19.6%, 30.3% and 12.0%, respectively. The desorption amount b of soil unit adsorption amount under the different cultivation modes was M / S> M> S. Compared with no phosphorus application, The values of b increased by 10.9%, 39.1% and -9.6% in M / S, M and S modes, respectively. The maximum phosphorus uptake (Qm) and soil desorption rate also showed the same trend.