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南阳盆地位于豫西南,地处北亚热带的北部边缘。境内北、东、西三面环山,地形地貌比较复杂。北部有海拔2000米左右的伏牛山脉,南部为海拔百米左右的盆中平原。因此,南阳盆地的气象,不仅受大陆性季风的制约,而且复杂的地形地貌,直接影响了光、热、水的时空分布,间接影响了种植业结构和产量水平,使玉米成为明显的地带性
Nanyang Basin is located in southwestern Henan Province, located in the northern margin of the northern subtropics. The territory of North, East and West surrounded by mountains, topography is more complicated. The northern part of the Funiu Mountains at about 2000 meters above sea level, the southern elevation of about 100 meters basin plain. Therefore, the meteorology in Nanyang Basin is not only restricted by the continental monsoon, but also has complicated terrain and landscape, which directly affects the spatial and temporal distribution of light, heat and water, indirectly affecting the structure and yield of planting industry and making maize obvious zonogenic