关键词: 农业气候区划, 干旱区域, 季风区, 暖温带, 湿润状况, 高寒区, 中国农业, 积温, 再论, 云南高原

Abstract: A former paper (Acta Geographica Sinica, Vol. 35, no. 2) by the present author and Lu, using hydrothermal condition, presented a tentative regionalization of agroclimate of China, three large regions were defined, the monsoon area, the arid area and the Tibetan Plateau. Regions of order 2 were based on the accumulated temperature above 10℃ and as for the regions of order 3, the aridity was adopted as the main index.In this paper, some principles for regionalization are revised as follows:1. In the former paper, the warm temperate climate belt was divided into two partsbut they were combined into one in the present paper. As for the Tibetan Plateau, three belts are defined: highland cold, sub-cold and temperate climate.2. Regions of order 3 not only defined according to humidity conditions, but also the differences in temperature and other factors as landform, surface water, soil and vege-tation are considered combinatively.3. Some climatic indexes used as bases in former case are modified and the bounda-ries have been redrawn. For example, the boun dary that separate the regions of aridity from the monsoon area is moved eastward to the west side of Daxingan Ling Mt., which is the crisscross area of pasture land and farm land. Belts define above may further reflect the differences between agriculture and pasture and so the cropping system; the regions of order 3 fit well to the physical environment, as well as in guiding agricultural development.