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中文摘要：
基于2007年汛期降雨径流观测实验数据,分析了作物种植模式差异对地表径流、土壤侵蚀累积量和地表径流氮磷流失累积量的影响,评价不同作物种植模式下的地表径流氮磷浓度及其构成差异。结果表明,与裸地处理相比,汛期末棉花和黄豆作物种植模式下的地表径流、土壤侵蚀累积量分别减少21.1%和49.5%以及54.5%和71.1%,不同形态氮磷地表径流流失累积量明显下降。可溶性氮磷流失与地表径流累积量密切相关,颗粒态氮磷流失与土壤侵蚀强度密不可分,可溶性氮磷成为棉花和黄豆作物生长中期农田氮磷地表径流流失的主体成分。在淮北平原汛期种植黄豆、棉花等作物,可起到有效减少地表径流氮磷流失的重要作用。
英文摘要：
The rainfall-runoff experiment in flood season of 2007 was conducted to evaluate the effects of cropping pattern on cumulative surface runoff, erosion, and nitrogen and phosphorus losses in surface runoff, and to assess the nitrogen and phosphorus concentration component of different cropping pattern. The results indicate that Compared to bare plot, the cumulative runoff in cotton and soybean plots decreased by 21.1% and 49.5%, the cumulative erosion of those decreased by 49.5% and 71.1%, and cumulative nitrogen and phosphorus losses in surface runoff reduced significantly. Cumulative dissolved nitrogen and phosphorus losses in runoff were closely related to cumulative runoff, while Cumulative particular nitrogen and phosphorus losses in runoff were closely related to cumulative erosion. Dissolved nitrogen and phosphorus constituted the major proportion of total nitrogen and phosphorus in runoff from cotton and soybean plots. To plant cotton and soybean in Huaibei plain was effective in reducing nitrogen and phosphorus losses.
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