砂梨是日本、中国、朝鲜的一种重要的园艺作物。近十年来，在新西兰、澳大利亚和智利诸国的商品栽培面积不断增加；而且意大利和法国对砂梨也是兴趣日增。这样，对梨树生理学资料特别是水分生理资料就有需求，以使能制定最佳灌溉策略。本研究于1989—1990年的梨树生长期在Masse Sand pear is Japan, China, North Korea, an important horticultural crop. Over the past decade, the area under commercial cultivation in New Zealand, Australia and Chile has continued to grow; and Italy and France have also shown increasing interest in sand pear. In this way, there is a need for physiology information on pear trees, especially on hydrophytes, to enable the development of optimal irrigation strategies. The study was conducted in 1989-1990 during the growth of pear trees in Masse