在建立农业生态安全评价指标体系基础之上,运用综合指数法、空间自相关分析和GIS技术对重庆市农业生态安全的空间格局进行了分析。结果表明:(1)重庆市农业生态安全空间分布极不平衡,农业生态安全等级总体上呈从重庆都市圈向渝东北和渝东南两翼方向逐渐降低的趋势,工业污染的阻隔效应明显;(2)重庆市农业生态系统安全度空间集聚格局趋于两极分化,呈好则愈好,差则愈差的格局;(3)重庆市农业生态系统空间自相关存在明显的尺度变化,70km距离阈值内农业生态系统具有较好的空间自相关性。本文针对重庆市农业生态安全问题,提出了相关的政策和建议,该研究对于优化配置区域农业资源和指导农业发展规划具有重要意义。
On the basis of establishing the indicator system for evaluation of agricultural ecological security,the spatial pattern of agriculture ecological security in Chongqing was analyzed using technique of composite index and GIS technology.The results showed that:(1)The spatial distribution of agricultural ecological security in Chongqing is very imbalance,The level of agricultural ecological security was decreasing from Chongqing metropolitan area to the direction of northeast and southeast overall,barrier effects of industrial pollution are more obvious;(2)The spatial concentration pattern of agricultural ecological security in Chongqing tend to polarization,was good the better and worse then the worse;(3) The Moran I of agricultural ecological security in Chongqing changes in different scales,the agricultural eco-system has good spatial autocorrelation within the threshold of 70km.This paper put forward the relevant policies and proposals to the problems,the study has a great significance for the optimal allocation of regional agricultural resources and guiding agricultural development planning.