深松筑挡对黑土顺坡耕地不同形态磷流失的阻控效果

Controlling Effects of Deep Loosening Building Block on Losses of Different Forms of Phosphorus on Black Soil Sloping Farmland

通过在黑土顺坡耕地应用深松筑挡措施,研究了深松筑挡技术对黑土顺坡耕地不同形态磷流失的阻控效果。结果表明:深松筑挡有拦截径流泥沙,减少坡耕地水土流失的作用。与CK相比,深松筑挡处理最高可以降低坡耕地径流中总磷、可溶性总磷和颗粒态磷浓度的58.19%,64.19%和55.02%;最高可以降低坡耕地总磷、可溶性总磷和颗粒态磷累积流失量的89.32%,90.74%和88.48%。相对来讲,深松筑挡降低径流中可溶性总磷浓度效果较好,颗粒态磷是黑土坡耕地径流中磷流失的主要形态。深松筑挡措施对坡耕地径流中不同形态磷流失均有一定的阻控作用。

In this study, the impedance controlling effects of deep loosening building block on losses of different forms of phosphorus （P） on black soil sloping farmland were studied. The results show that： Deep loosening building block could intercept runoff and sediment, and reduce soil and water loss on sloping farmland. Compared with the CK, deep loosening building block processing reduced the total P concentration, dissolvable total P concentration, and particulate P concentration in farmland runoff by 58.19%, 64.19% and 55.02%, respectively; it could reduce the cumulative loss of total P concentration, dissolvable total P concentration, and particulate P concentration by up to 89.32%, 90.74% and 88.48%, respectively. Relatively speaking, the effects of deep loosening building block on reducing dissolvable total P concentration in runoff was better, particulate P was the predominant form of phosphorus lost in the runoff of black soil sloping farmland. Deep loosening building block measures had certain controlling effects on reducing the losses of different forms of Dhosohorus in the runoff of slooing farmland.