【摘要】 农村居民点用地是乡村聚落景观的重要组成部分,其新建或重建过程从空间上来看是其与内部和周围环境之间相互竞争控制与覆盖的过程。在我国城市化加速推进的背景下,农村居民点用地却不降反升,其空间布局与扩张对自然生态环境的影响及反馈还考虑不足。借鉴景观生态格局的相关理论与方法,运用最小累积阻力模型,以都江堰市为例进行农村居民点用地的生态适宜性评价与分析。结果表明:(1)近十年来,研究区各土地生态适宜性分区空间分布相对集中,生态较适宜与高度适宜区域有一定程度的收缩,而较不适宜与不适宜区域则扩张明显,"一减一增"的鲜明对比表明人类活动对当地景观生态格局的干扰在明显增强;(2)不同时间段农村居民点用地的生态适宜性变化存在明显差异,在生态不适宜区,农村居民点的数量与面积始终保持了较高的增长势头,而中等适宜及以上等级区域的农村居民点数量与面积则经历了先增加后减少的变化趋势;(3)农村居民点用地的生态适宜性处于不断变化之中,2005～2010年和2010～2015年,分别有559.39和781.11 hm~2的农村居民点生态适宜性等级发生了变化。研究结果对于加强当地重要生态景观单元的保护,协调人与土地、人与自然之间的矛盾,提高农村土地资源的利用效率和制定村庄建设发展规划等具有一定的实践指导意义。更多还原

【Abstract】 Rural residential land is one of the major landscapes for rural settlement. Spatially, the newly-construction or reconstruction for rural residential land depends on its interaction of competitive control and coverage with interior and exterior environment. Under the background of accelerating urbanization in China, rural residential land has been increasing rather than decreasing. At the same time, the impact of its spatial layout and expansion on the natural ecological environment and feedback has not been considered enough. Based on the relevant theories and methods of landscape ecological pattern, this paper uses the minimum cumulative resistance model, and takes Dujiangyan as an example to evaluate and analyze the ecological suitability of rural residential land sites. The results showed that:（1） For the past ten years, the spatial distribution of ecological suitability zoning in the study area was relatively concentrated, with shrink in divisions of relative high and highest levels of ecological suitability, while evident expansion in divisions that of relative low and lowest levels. These great contrasts indicated that the impact of human activities on the local landscape pattern was increasing.（2） The dynamic changes of ecological suitability varied within different time periods, in lowest level of ecological suitability area, the quantities and areas of rural residential land kept increasing, while in that of moderate and above levels, the quantities and areas showed increase firstly and then decline.（3） The ecological suitability of residential land was changing continuously, with 559.39 hm² from 2005 to 2010 and 781.11 hm² from 2010 to 2015 respectively. The results have extensive practical value in strengthening protection of local significant ecological landscape unions, coordinating the contradiction between human and land, and human and nature, improving the utilization efficiency of rural land resource, making plans of rural constructive development.更多还原