中文摘要：

研究以河南省17个气象站点的1980年-2004年日气象资料为基础，借助GIS的空间分析功能，采用AEZ模型定量计算河南省县域的夏玉米光合、光温生产潜力，并结合县域尺度的夏玉米实际产量数据，分析各县市夏玉米光合、光温资源利用率的空间差异，对河南省夏玉米的光合光温资源利用效率进行评价。讨论了河南省夏玉米的光合、光温资源利用效率有着一定的空间分布规律，且与生产潜力图有着较大的空间差异，各县域的资源利用率也差异显著的原因。结果表明：①夏玉米的光合、光温生产潜力县域之间差异明显，且二者均表现出从东南向西北递增的空间分异规律；②县域夏玉米的光合、光温资源利用效率呈现出与相应潜力值大体相反的空间分布，即由西向东、从南至北大体增加的趋势，且全省平均光合、光温资源利用率分别为15％、65％，有进一步提高的空间。

英文摘要：

Henan, one of China＇ s major agricultural provinces, grows maize as its main autumn crop, which takes a pivotal position in the total autumn crop production throughout this country. The main factors restricting improvement in crop production and limiting the potential can be found through examining crop production potential, which is an effective way to improve crop yield. In this study, potential photosynthetic productivity and potential photo-temperature productivity of summer maize in Henan Province were systematically investigated using daily meteorological data at 17 meteorological stations across Henan Province during the period from 1980-2004, and models （i.e., Agro-ecological Zone, AEZ） at county levels. Differences in utilization efficiency of photosynthetic and photo-temperature resources were analyzed using field observations. The production potential map shows a large spatial heterogeneity. Results show that the potential productivity was significantly different among counties and tended to increase from southeast to northwest. Overall, both utilization efficiency of photosynthetic and photo-temperature resources tended to increase from the west to the east or from the south to the north, whereas the average utilization efficiency of photosynthetic and photo-temperature resources was 15% and 65%, respectively, which could be further improved. The distribution pattern was primarily determined by solar radiation and average temperature. The amount of solar radiation affected the output, so the performance of resource utilization was that it was high in the north and east and relatively low in the west and south. For the vast plains and hilly areas, the average temperature and accumulated temperature can meet the need for corn growth, so the temperature had a less impact on resource utilization. For mountainous areas, the climate was generally cooler, the accumulated temperature was lower, and the suitable growing period was short, all of which affected the actual production of corn over the mounta