基于GIS技术的河南粮食核心区小麦玉米区域潜力研究

为探讨河南粮食核心区小麦玉米的生产潜力，采用机制法研究了基于GIS的小麦、玉米光合、光温、气候和土土等自然生产潜力。结果表明：河南省小麦玉米均存在较大的增产潜力，并且玉米的增产潜力远高于小麦，表现在玉米的光温潜力、气候潜力和土壤潜力高于小麦的各项潜力指标；各潜力指标与县区间的比例关系为：光合和光温潜力中产县的比例大，高产县和低产县的比例均较少，气候潜力和土壤潜力高产县和低产县的比例增加，并高于中产县比例；小麦玉米潜力各指标间优势区域不完全相同，总体趋势是，豫北和豫中地区潜力较大，现实产量也最高，豫东、豫东南地区居中，豫西和豫西南地区较低；河南省粮食核心区建设的关键是挖掘小麦、玉米的气候生产潜力和土壤生产潜力。

Potential productivity of wheat and maize in grain production center of Henan Province based on GIS

With mechanism method, natural potential productivity (light, temperature, water and soil) of wheat and maize in the grain core area of Henan Province was studied. The results showed that there is larger potential to increase the yield of wheat and maize. Furthermore, the potential to increase the yield of maize was much higher than that of wheat, for each potential index for maize productivity was higher than that of wheat, including temperature, weather, and soil. The counties with medium maize yield have larger potential of photosynthesis and temperature than counties with higher and lower maize yield, and the later regions have larger potential of weather and soil than the former. Though the preponderant region of each potential index for wheat and maize was completely different, the general trend was that the largest potential and realistic yield were both in the north and middle region of Henan Province, followed by the east and south-east region, and the lowest potential was in the west and south-west region. The key of building the grain core area of Henan Province is to develop the weather and soil potential of wheat and maize productivity.