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用土柱研究旱地土壤60cm土体夏季的氮肥淋溶损失，结果表明，在土壤施尿素后35d内淋水350mm，在不产生泾流的条件下，淋失率平均为25．5％。还探讨了氮肥淋溶过程中的氮形态变化，以及施氮量和土层深度对氮肥淋浴损失的影响。
Soil column was used to study the leaching loss of nitrogen fertilizer in 60 cm soil layer in summer. The results showed that the average leaching loss was 25.5% under the condition of no Jing flow. The change of nitrogen form during nitrogen leaching and the effect of nitrogen application rate and soil depth on the shower loss of nitrogen fertilizer were also discussed.