CHANG Ting,ZHOU Sheng-lu,DAI Liang,et al.Study on Urban and Rural Gradient Rule of Land Ecological Quality in Jintan City[J].Research of Soil and Water Conservation,2014,21(03):130-135.
金坛市土地生态质量的城乡梯度规律研究
- Title:
- Study on Urban and Rural Gradient Rule of Land Ecological Quality in Jintan City
- Keywords:
- land ecological index; hotspot spatial differentiation; transect gradient; circle gradient; Jintan City
- 分类号:
- F301.24
- 摘要:
- 金坛市作为长三角经济发达地区的典型地区，快速城镇化背景下其土地生态状况具有代表性。从基础、胁迫、结构、效益4个角度构建土地生态指数指标体系，以行政村为评价单元计算4个准则层分值和土地生态指数综合分值，在此基础上假设金坛市土地生态质量分布具有城乡梯度的规律。通过热点和梯度分析验证表明：（1）土地生态指数热点空间分异特征符合城乡梯度规律，城镇化是导致该规律的重要原因；（2）土地生态指数沿着金坛市“城镇—城乡结合部—近郊—远郊”环形梯度分布，总体上土地生态指数不断升高，沿城镇中心向外每增加2 400 m，土地生态指数提高1.6%；（3）城镇中心土地生态质量状况处于最低值，且城镇所在地土地生态质量比正常状态差，更精细地表明城镇化对土地生态质量的不良影响；区域土地生态结构是影响金坛市土地生态综合指数波动的最大因素。（4）该文对土地生态指数空间分异规律作了深入探究，对土地生态指数空间分异的驱动力分析和主控因子识别将在进一步研究中进行探索。该研究可引导政府在城镇化进程中实施改善土地生态质量的政策。
- Abstract:
- As a typical city with developed economy in the Yangtze River Delta region, land ecological problem of Jintan City is representative. In order to verify the influence of urbanization on the land ecological quality, this paper builds the indicator system of land ecological index from the perspectives of foundation, stress, structure and efficiency. The scores of four criteria layers and land ecological index were calculated in the unit of administrative village. Based on this, the distribution of land ecological quality in Jintan City is assumed to show urban and rural gradient rule, and this assumption is validated by using hotspots, circle gradient analysis and transect gradient analysis. The results are as followings: (1) the hotspot spatial distributive characteristics of land ecological index meets the urban and rural gradient rule, and this phenomenon is mainly caused by urbanization; (2) circle gradient analysis indicates that land ecological index raises along with ‘urban-urban fringe-inner suburbs-outer suburbs’ circle gradient in Jintan City, land ecological index increases by every 1.6% when there is a distance of 2 400 m away from town center, though criteria layer gradient is insignificant, but its scores showed an increasing trend from the inside; (3) the results show that ecological quality status of the town center is in the lowest land values, and land ecological quality of urban area is worse than the normal, it shows that urbanization had an adverse effects on the land ecological quality at a finer level, land ecological structure in Jintan City is the most significant factor to influence the composite index; (4) in this paper, land ecological index spatial differentiation is explored deeply. Moreover, the driving force for the spatial variation of land ecological indices and identification of the main factors will be explored in the further studies. This study could lead the government to implement policy that may improve the ecological quality in the process of urbanization.
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备注/Memo
收稿日期:2013-09-24;改回日期:2013-10-16。
基金项目:长三角经济发达地区土地生态状况调查与评估（DCPJ121504-01）
作者简介:昌亭(1990-),女(苗族),重庆人,硕士研究生,主要研究方向为土地利用与区域经济发展。E-mail:changtingnju@163.com
通讯作者:周生路(1968-),男,江西大余人,教授,博士生导师,主要从事土地资源与环境研究工作。E-mail:zhousl@nju.edu.cn