Abstract Unreasonable layout of drip irrigation systems and inappropriate irrigation decision-making methods in orchards in water-scarce areas in Northern China result in low water use efficiency (WUE). In order to reveal the effect of drip irrigation mode on WUE of orchards and improve efficient use of water resources, this study used pear (Pyrus pyrifolia cv. Whangkeumbae) as a test material to conduct a two-year field irrigation experiment, considering the two factors of drip irrigation pipes layout and lower limit of soil moisture，five drip irrigation modes and a control treatment (CK) were set up. By measuring the soil moisture content, water consumption, yield and fruit quality, the effects of different drip irrigation modes on spatial coefficient of variation (CV) of soil moisture, pear tree growth and WUE were evaluated. The results showed that the CV and the soil moisture content showed a significant linear negative correlation (p

中文翻译：

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不同滴灌方式对北方梨树水分利用效率的影响

摘要 我国北方缺水地区果园滴灌系统布局不合理、灌溉决策方法不当，导致水资源利用效率（WUE）偏低。为揭示滴灌模式对果园水分利用效率的影响，提高水资源利用效率，本研究以梨（Pyrus pyrifolia cv. Whangkeumbae）为试验材料，进行了为期两年的田间灌溉试验，综合考虑了两种设置了滴灌管道布置和土壤水分下限因素、五种滴灌模式和控制处理（CK）。通过测量土壤水分含量、耗水量、产量和果实品质，评价不同滴灌方式对土壤水分空间变异系数（CV）、梨树生长和WUE的影响。