华北平原城郊区种植结构调整的内在动力和趋势分析

以河北藁城市为例，对华北平原城郊地区近如年种植结构特征及驱动因子等进行了系统分析。认为该区域种植结构变化与粮食生产能力提高是同步的，即逐步由发展高产作物转向发展高效作物、由传统多样化种植向单一化和专业化发展；生产条件改善、体制和需求变化是种植结构调整的基础，而比较优势是结构变化的内在动力。在内在动力和趋势分析基础上提出了该区域种植业结构调整的基本思路及支撑技术。

Intrinsic driven force and trend of planting structure adjustment in the suburban area in North China Plain

The characteristics and driven forces of change of cropping structure, in the suburban area of North China Plain, were discussed through a case study in Gaocheng County of Hebei province. The cropping structure was adjusted synchronously with the growth of grain production capacity in the previous 50 years. The trend has been from planting high yield crops to cash crops, from traditional diversified planting to specialized planting. The improvement of production and conditions of demand are prerequisite of structure adjustment, and the comparative advantages are the intrinsic driven force. The suggestions and key techniques of cropping structure adjustment for this region were proposed.