历史时期柑橘种植北界与气候变化的关系

Relationship between Geographic Northern Bounds of Orange Cultivation in Chinese History and the Climatic Changes

本文利用文献记录讨论了我国历史上柑橘北缘种植地区的位置变化。在南北朝后期、元朝前期和明朝后期 ,柑橘种植北界超过现代的北界 ,而另一些时期柑橘种植的北界出现明显的南退。造成亚热带果木柑橘种植北界大幅度迁移的主要原因与气候的冷暖变化有关 ,记载较详细的清朝初期例子表明 。

In light of historical documents,the writer explores the changes in the geographic northern bounds of China’s orange cultivation.In the late Northern and Southern Dynasties and the late Ming Dynasty,orange cultivation exceeded its present northern geographical bounds,while in some other periods,such bounds displayed obvious recession to the south.All this is chiefly related to climatic changes.Comparatively detailed records in the early Qing Dynasty indicate that the tendency to become cold in the climate characterized by successive cold spells played a decisive part in setting the northern bounds of China’s orange cultivation.