刘 欢，周忠学，齐爱荣.西安市都市农业生态安全动态评价及空间分异[J].干旱地区农业研究,2013,31(6):225~231
西安市都市农业生态安全动态评价及空间分异
Dynamic evaluation and spatial differentiation on ecological security of urban agriculture in Xi’an City
  
DOI：10.7606/j.issn.1000-7601.2013.06.039
中文关键词:  都市农业  生态安全  动态评价  空间分异  西安市
英文关键词:urban agriculture  ecological security  dynamic evaluation  spatial differentiation  Xi'an City
基金项目:国家自然科学基金（41271550）；教育部人文社会科学研究西部和边疆地区项目（12XJC790003）；中央高校基本科研业务费专项资金资助(GK200902022)；陕西师范大学优秀科技预研项目(200902014)
作者单位
刘 欢，周忠学*，齐爱荣 （陕西师范大学旅游与环境学院， 陕西 西安 710062） 
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中文摘要:
      通过构建都市农业生态安全概念及评价指标体系，运用熵值法、障碍度分析模型、GIS制图技术对西安都市农业生态安全进行综合评价。结果表明：西安都市农业生态安全指数从2002年的0.44增加到2011年0.68，生态安全状态明显 好转；城市化对都市农业资源可持续能力和系统稳定程度负面影响较大,而对产出持续增长和发展保障能力正面影响更大；近十年来，阻碍西安都市农业生态安全的关键制约因素平均障碍度2003、2006、2011年分别为12.47%、7.05%、4.97%，表明其影响程度在逐渐减弱；西安地区生态安全指数值（S）：莲湖、碑林、新城区S≤0.15，蓝田县0.15<S≤0.27，长安区和阎良区S＞0.35，其余区县0.27<S≤0.35，表明因 西安各地区都市农业生产条件差异、交通便捷程度及与城市经济联系强度差异而呈明显的空间分异。
英文摘要:
      In this paper, a concept of urban agro ecological security and its evaluation indicator system are put forward, and comprehensive evaluation for urban agriculture ecological security in Xi'an City has been carried out by applying the entropy value method, obstacle degree analysis model and GIS spatial analysis technique. The result shown that: The safe index of urban agro ecological security has increased from 0.44 in 2002 to 0.68 in 2011, the urban agro ecological security conditions were improved obviously. The urbanization have large negative influence to the sustainable ability and system stability of urban agricultural resources, while more positive influence on output sustainable increase and development ensure ability. In recent ten years, the average obstacle degree of the key factors which impeded the improvement of urban agro ecological security were 12.47%, 7.05% and 4.97% respectively in the years of 2003, 2006, and 2011, which shown that the obstacle degree has gradually decreased in Xi'an City. The ecological security index in Xi′an Region was S≤0.15 in Lianhu, Beilin, and Xincheng district, 0.15<S≤0.27 was in Lantian County. S＞0.35 was in Chang’an and Yanliang District. 0.27<S≤0.35 was in the rest of districts. This indicated the significant spatial differentiation due to the difference of agricultural production condition, the convenience degree of traffic, and linking degree to urban economic in each distric t of Xi'an City.
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