欠发达农区特色种植空间扩散研究——以河南省大营村为例

农业创新只有充分地扩散，才能最大限度地发挥出其经济效应。本文以河南省信阳市固始县大营村为例，分析了大营村萝卜特色种植的优势条件，借助创新扩散理论揭示其特色种植的空间扩散轨迹，并总结其空间扩散方式、空间结构及影响环境。得出如下结论：①大营村特色萝卜产业选择具有优越的自然资源禀赋、悠久的种植历史、广阔的市场需求等优势；②大营村萝卜种植扩散，在空间上按照渐进式和跳跃式相结合的方式进行，存在一定的距离递减效应；③大营村萝卜种植扩散的空间结构呈现出点轴式模式，种植基地布局具有明显的“杜能圈”印迹；④大营村萝卜种植的空间扩散受到空间距离、地理环境、扩散效益、政府作用等因素的影响。

Spatial Diffusion of Characteristic Planting in Less Developed Rural Areas： A Case of Daying Village, Henan Province

The diffusion of agricultural innovation could call into its full play to the utmost extent in the sense of economy development,only on condition that it is sufficiently spread.As to the case study of Daying Village,Gushi County,Xinyang City,Henan Province,this paper analyzes the advantages of radish characteristic planting in Daying Village,reveals the track of the spatial spread of characteristic planting with reference to the innovation diffusion theory,summarizes the spatial diffusion pattern and its structure,and probes into the factors affecting the diffusion of characteristic planting in Daying Village.The conclusions are drawn as follows:(1) Daying Village’s industrial selection of radish characteristic planting has strengths such as a natural resource endowment,a long history of cultivation,a strong market demand and so on;(2) Daying Village’s radish planting spreads spatially in the wavy manner,and there apparently exists distance decay effect;(3) The spatial structure of Daying Village’s radish planting diffusion takes place in the form of pole-axis mode,and the layout of planting bases have a significant "Thunen ring" imprint;(4) Daying Village’s radish planting diffusion falls under the influence of spatial distance,geographical environment,the benefits of proliferation,government’s effect and other factors.