榅桲(Cydonia oblonga)作西洋梨的矮化砧在国外早已应用于生产,但榅桲作中国梨的矮化砧国内外研究甚少,且无明确结论。近十多年来,随着梨树生产的发展和大规模商品生产基地的建设,梨幼树早结果,早丰产已成为梨树发展中急待解决的问题。因此梨矮化砧木的研究才引起了人们的重视。我所自1974年开始,开展了以榅桲为主的梨矮化砧木的研究。经过几年试验,证明云南榅桲通过亲和中间砧——哈代(Hardy)上接中国梨 Cydonia oblonga is the dwarfing agent of pears in western countries. However, the dwarfing of Cydonia oblonga has long been used abroad for production. However, little research has been done on the dwarfing of Chinese pear. In the recent ten years, with the development of pear production and the construction of large-scale commodity production bases, early results of pear saplings and early yield increase have become urgent problems to be solved in the development of pear trees. Therefore, dwarfing rootstocks research has aroused people’s attention. Since 1974, we have started the research on dwarfing rootstocks mainly made of grubs. After several years of testing, it was proved that Yunnan emu was connected to Pear through its affinity intermediate stock - Hardy