中文摘要：

为了探索马铃薯地下滴灌带的适宜埋设深度,田间布置了5个埋设深度,埋深分别在地下10、20、30、40、50cm深度,研究同一土壤水分控制条件下（地面20cm深度土壤基质势下限控制在-30kPa）,马铃薯出苗、产量和灌溉水利用效率对地下滴灌的响应。结果表明,与埋设深度为10cm和20cm的处理相比,当埋设深度大于30cm后,马铃薯的出苗进程整体滞后4d,但对最终出苗率无影响;埋设深度为20-30cm时马铃薯的产量和块茎质量大于100g的占比显著高于其他处理（P〈0.05）;最大灌溉水利用效率出现在埋设深度为20cm的处理。在马铃薯出苗后控制地下20cm处土壤基质势不低于-30kPa的情况下,地下滴灌带的最佳埋设深度为20cm。

英文摘要：

In order to explore the proper lateral depth of underground drip irrigation for potato, an experiment was carried out to study the response of potato emergence processing, yield and irrigation water use efficiency to the five lateral depths of underground drip irrigation at 10, 20, 30, 40, 50 cm depth under the same soil moisture control （the soil matrie potential at 20 cm depth underground was kept higher than --30 kPa）. The results showed that, compared with the lateral depths of 10 cm and 20 cm, when the lateral depth was deeper than 30 cm, the potato e- mergence processing entirely delayed by 4 days, but had no influence on emergence rate finally. The potato yield and percentage of tuber weight more than 100 g were the highest （P〈0.05） when the lateral depth was 20-30 cm. And the maximum irrigation water use efficiency occurred when the lateral depth was 20 era. In conclusion, under the condition of controlling the soil matric potential at 20 cm depth underground higher than -30 kPa after the potato emerged, the optimal lateral depth of underground drip irrigation was 20 cm.