隔沟交替灌溉（Partialroot-zonedrying，PRD）被认为是一种节水灌溉的方法，它可以提高多种作物的水分利用率。本研究开展于我国甘肃与内蒙两个半干旱马铃薯种植区，比较常规灌溉与隔沟交替灌溉对马铃薯产量和水分利用率的影响。结果表明，由于两个试验点的气候条件与土壤条件不同，所以马铃薯产量存在显著的差异。但是在两试验点中，PRD。处理（隔沟交替灌溉，灌水量为经验灌水量的1／2）的产量与常规灌溉处理（c100，经验灌水量）的产量没有显著的差别，水分利用率却显著提高。研究显示，运用合理的灌溉方式，可以在保证产量不变的基础上节省用水量。另外，在易发生干旱的地区，选用适合的品种，同时采用覆膜技术对于增加马铃薯产量有着重要的作用。%Partial root-zone drying （PRD） irrigation method was considered as a water-saving irrigation method which could increase the water use efficiency for many crops. To compare the partial root-zone drying as an alternative to the conventional irrigation method used in semi-arid potato producing areas in China and its impact on tuber yield and water use efficiency, field trials were conducted in Gansu and in Inner Mongolia where water was the main constraint to potato production. Due to different soil types and rainfalls, the yield of potatoes in two locations varied remarkably. However, the yield of PRD using half amount of water as conventional irrigation was very close to the yields of the full conventional irrigation method in the two locations. The results showed that water could be dramatically reduced in Inner Mongolia and Gansu without affecting the tuber yields by proper irrigation management. Results also supported the fact that the use of plastic mulching and a variety selected for drought-prone environments could increase the potato yield.
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