目前，我国梨果生产多集中于晚熟品种，大产品同时上市，使梨果市场不景气。因此，适当发展中早熟已势在必行。经中国农科院果树研究所对梨树砧木的研究结果显示：杜梨是梨树砧木中抗寒、抗旱、耐涝、耐盐碱同时具备的综合抗性最强的砧木，对所有的白梨、砂梨、秋子梨系统品种 At present, the production of pear fruit in China is mostly concentrated in late-maturing varieties, while the large products are listed at the same time, making the pear fruit market downturn. Therefore, proper development of mid-early maturity is imperative. The results of the research on pear rootstock by the Chinese Academy of Agricultural Sciences Institute of Pomology showed that the pear rootstock is the rootstock with the most comprehensive resistance to cold, drought, waterlogging and salt-tolerant in pear rootstocks, Pear, sand pear, autumn pear system varieties