北京为京白梨的主产区,所产京白梨因皮薄、肉厚、甜脆多汁、香味浓郁而久享盛名。但我们在昌平、门头沟和房山等地调查发现,京白梨主产区较普遍存在品种单一的现象,因而座果率低,产量少。为提高京白 Beijing is the main producing area of ​​Beijing White Pear, which produces Peking Pear for a long time due to its thin, thick meat, sweet and crisp juicy, rich aroma and long enjoyed a good reputation. However, we surveyed in Changping, Mentougou and Fangshan and other places found that the main producing area of ​​Jingbai more common phenomenon of a single species, and thus low fruit yield, low yield. To improve Beijing white