干旱地区农业研究
榦旱地區農業研究
간한지구농업연구
AGRICULTURAL RESEARCH IN THE ARID AREAS
2013年
6期
225-231,237
,共8页
都市农业%生态安全%动态评价%空间分异%西安市
都市農業%生態安全%動態評價%空間分異%西安市
도시농업%생태안전%동태평개%공간분이%서안시
urban agriculture%ecological security%dynamic evaluation%spatial differentiation%Xi’an City
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。
通過構建都市農業生態安全概唸及評價指標體繫，運用熵值法、障礙度分析模型、GIS製圖技術對西安都市農業生態安全進行綜閤評價。結果錶明：西安都市農業生態安全指數從2002年的0．44增加到2011年0．68，生態安全狀態明顯好轉；城市化對都市農業資源可持續能力和繫統穩定程度負麵影響較大，而對產齣持續增長和髮展保障能力正麵影響更大；近十年來，阻礙西安都市農業生態安全的關鍵製約因素平均障礙度2003、2006、2011年分彆為12．47％、7．05％、4．97％，錶明其影響程度在逐漸減弱；西安地區生態安全指數值（S）：蓮湖、碑林、新城區S≤0．15，藍田縣0．15＜S≤0．27，長安區和閻良區 S＞0．35，其餘區縣0．27＜S≤0．35，錶明因西安各地區都市農業生產條件差異、交通便捷程度及與城市經濟聯繫彊度差異而呈明顯的空間分異。
통과구건도시농업생태안전개념급평개지표체계，운용적치법、장애도분석모형、GIS제도기술대서안도시농업생태안전진행종합평개。결과표명：서안도시농업생태안전지수종2002년적0．44증가도2011년0．68，생태안전상태명현호전；성시화대도시농업자원가지속능력화계통은정정도부면영향교대，이대산출지속증장화발전보장능력정면영향경대；근십년래，조애서안도시농업생태안전적관건제약인소평균장애도2003、2006、2011년분별위12．47％、7．05％、4．97％，표명기영향정도재축점감약；서안지구생태안전지수치（S）：련호、비림、신성구S≤0．15，람전현0．15＜S≤0．27，장안구화염량구 S＞0．35，기여구현0．27＜S≤0．35，표명인서안각지구도시농업생산조건차이、교통편첩정도급여성시경제련계강도차이이정명현적공간분이。
In this paper,a concept of urban agro-ecological security and its evaluation indicator system are put for-ward,and comprehensive evaluation for urban agriculture ecological security in Xi’an City has been carried out by apply-ing 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 201 1,the urban agro-ecolog-ical 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 de-velopment ensure ability .In recent ten years,the average obstacle degree of the key factors which impeded the improve-ment 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 spa-tial differentiation due to the difference of agricultural production condition,the convenience degree of traffic,and linking degree to urban economic in each district of Xi’an City .
