基于ESDA的河北省粮食单产空间格局变化研究

为揭示河北省粮食单产空间格局分布特征,因地制宜地制定区域粮食安全生产政策,采用泰尔指数模型与ESDA空间分析技术,对1987-2009年河北省136个县粮食单产的区域差异特征以及动态演变格局和成因进行分析。研究表明:粮食单产的整体差异和4个生态类型区的区间差异呈现逐渐缩小趋势,燕山太行山山前平原区、冀鲁豫低洼区和后山坝上高原区的内部差异在研究期内逐渐缩小,辽吉西、蒙东南、冀北山地区的内部差异呈现增长的过程,导致区域内差异对总体差异的贡献下降;河北省的粮食单产空间聚集程度有所减小,局部的空间相关来看,以石家庄市为中心粮食产量区域较为稳定,而张家口为中心的地产区域有扩大趋势;影响粮食单产格局变化最为主要的因素是有效灌溉面积、单位面积劳动力投入和粮食收购价格指数等。

Regional Difference Research of Grain Per Unit Area Yield in Hebei Province Base on ESDA

In order to reveal the spatial distribution pattern of grain per unit area yield in Hebei Province,and formulate regional development of food safety policy suitable to local conditions.Using the methods of Theil index and ESDA spatial analysis tools,paper investigated the regional disparity and dynamic evolution patterns of grain per unit area yield and analyzed the cause.This study showed that the overall and interregional disparity of different cultivation Areas tend to be lower,while the differentiations exist in different intraregional of cultivation areas.The intraregional disparity of the plain region of the east Taihang and Yanshan mountains,the geomorphologic low region of Jinjiluyu and the plateau region of Tangshan reduced gradually,while the Liaojiximeng and southeast of North Mountain area showing the increasing process.The internal disparity contribution ratio to the overall disparity decreased.Secondly,the tendency of spatial concentration was decling during the study.From local spatial cluster,the area with Shijiangzhuang city as the center,remain stable keep the pace of grain production,but the low production area with Zhangjiakou city as the center,appeared to broke out.Finally,Grey relation analysis shows that the main factors which affected grain yield per unit area are the effective irrigated area,labour per unit area,grain purchase price index and so on.