每年秋季北京上市的当地所产苹果,目前都是引进的外来品种,或引进品种的杂交种.据笔者记忆,北京市上最早见到引进种苹果当在五十至五十五年前.那么,在引进这些外来品种之前,北京地区是否也产苹果,它的生产情况又是怎样的呢?我国土种苹果大都产于北方,后来逐渐发展到几乎各省都有.其栽种历史颇为悠久,据说魏晋时已广为栽培,始名为“奈”.北魏贾思勰《齐民要术》引郭义恭《广志》谓:“张掖有白奈,酒泉有赤奈,西方例多奈,家以为脯,数十百斛以蓄积,如收藏枣栗.魏明帝(227～239)时,诸王入朝,夜赐冬成奈(奈中一种晚熟的,冬至成熟,谓之冬 The locally-produced apples, which are listed in Beijing each fall, are currently imported exotic varieties or introduced varieties of hybrids. According to the author’s memory, the earliest saw introduction of apples in Beijing was between 50 and 55 years ago. Before the introduction of these alien species, whether Beijing also produces apples and what is its production situation? Most of our native-grown apples are mostly grown in the north and gradually developed into almost every province, and its planting history is rather long, It is said that when the Wei and Jin Dynasties have been widely cultivated, began to be called ”Nai.“ Northern Jia Jiasi ”Qi Min Yao Shu“ cited Guo Yi Gong ”Guang Zhi“ said: ”Zhangye have Bai Nai, Jiuquan have Chennai, That preserved, dozens of Huhu to accumulate, such as the collection of jujube .Wei Mingdi (227 ~ 239), the kings into the night, thanks to winter Chennai (Chennai a late ripe, winter solstice, said the winter