【摘要】 对宁夏回族自治区南部山区旱作农业隔坡梯田灌溉效益进行了试验研究,试验包括坡面径流试验、土壤含水量观测试验、坡面径流集水试验、节水灌溉试验,并利用观测数据分析了隔坡梯田的灌溉效益。结果表明,隔坡梯田具有明显的阻拦泥沙、保持水分、增加土壤含水量、培肥土壤养分和提高作物产量等效益,并提出了最佳平坡比,为黄土高原旱作农业集水灌溉提供理论依据。更多还原

【Abstract】 We have conducted the research on the irrigation benefit, and set up the following experiments including slope runoff experiment, soil moisture content observation experiment, runoff-collecting experiment, water-saving irrigation experiment in the Xiji County of Ningxia. Then irrigation benefits were analysed with the observed data. The result indicates that the slope-separated terrace has the following benefits: retaining the runoff and sediment, preserving the moisture, increasing the soil moisture content, improving the soil nutrient and crop yield, etc., and the area ratio of the terrace to slope was put forward. It provides the essential theoretical foundation for the water-collecting irrigation of dry farm on Loess plateau.更多还原