【摘要】 耕地的生态安全关系到区域的可持续发展,针对耕地生态安全现状,以宁波市南郊小尺度区域为研究对象,基于人与耕地的相互作用机理,通过改进的PSR模型从而构建出适用于研究区域的评价体系,采用熵权法和综合评价法,对2005—2014年间宁波市南郊的耕地生态安全状况进行评价分析,结果表明:(1)从时间尺度上看, 2005—2014年宁波市南郊耕地生态安全经历了"较安全—临界安全—较不安全—安全"的变化阶段。(2)从空间尺度上看,各乡镇街道耕地生态安全状况存在着明显的区域性差异。西部地区整体水平较高,东部地区次之,其中东部以北最低;2005—2014年宁波市南郊生态安全指数变化较小;宁波市南郊生态安全指数呈现显著的空间集聚性,高—高聚类显著性较弱,低—低聚类显著性较强。更多还原

【Abstract】 The ecological security of cultivated land is related to the sustainable development of the region. According to the present situation of cultivated land ecological security, the small scale area in the southern suburb of Ningbo is taken as the research object. Based on the interaction mechanism between human and cultivated land, the evaluation system suitable for the study area was constructed by PSR model. The entropy weight method and comprehensive evaluation method were used to evaluate the cultivated land ecological security status in the southern suburbs of Ningbo City during 2005-2014. The results are as follows.(1) From the time scale point of view, the cultivated land ecology of the southern suburbs of Ningbo City in 2005 and 2014 was analyzed by the entropy weight method and the comprehensive evaluation method. The ecological security status of cultivated land in the southern suburbs of Ningbo City was analyzed from 2005 to 2014. Safety has undergone a "safer-critical safety-less insecure-safe" phase of change.(2) From the perspective of space, there were obvious regional differences in ecological security of cultivated land in towns and villages. The overall level of the western region was higher than that of the eastern region, with the lowest in the north of the eastern part. The ecological security index of the southern suburbs of Ningbo City changed little in 2005-2014. The ecological security index of the southern suburbs of Ningbo showed significant spatial concentration and high-high clustering less significant, low-low clustering significantly stronger.更多还原