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苏州市耕地保护等级评价
引用本文:苏伟忠,杨桂山,顾朝林.苏州市耕地保护等级评价[J].自然资源学报,2007,22(3):353-360.
作者姓名:苏伟忠  杨桂山  顾朝林
作者单位:( 1.中国科学院南京地理与湖泊研究所, 南京210008; 2.清华大学建筑学院城市规划系, 北京100084)
基金项目:国家自然科学基金;国家自然科学基金
摘    要:基于国内外相关研究与PSR 模型提出环境压力、土壤质量、破碎度、粮食单产等耕地保护等 级评价指标。单项指标评价表明: 苏州耕地环境压力突出、土质较好、破碎化明显、粮食产量高。基于 指标相关性分析, 选用层次聚类分析法, 对样本特征聚类分为4 等, 各等面积百分比S1∶S2∶S3∶S4= 33.6∶32.4∶26.7∶7.3。S1 在乡村区和湖荡区, 各指标良好; S2 在沿江平原及城市化边缘区, 土质良好, 粮 食产量较高; S3 散布在城市化边缘区及湖荡丘陵区, 各指标中等; S4 散布在城市周边及湖荡丘陵区。 进而基于各等级的地域特征及指标关系, 将耕地保护等级又分为9 级, 并指出各级耕地保护措施。

关 键 词:耕地保护  等级评价    PSR  模型    苏州市  
文章编号:1000-3037(2007)03-0353-08
收稿时间:2006-09-20
修稿时间:2006-12-26

Research on Gradation Evaluation of Cultivated Land Conservation in Suzhou City
SU Wei-zhong,YANG Gui-shan,GU Chao-lin.Research on Gradation Evaluation of Cultivated Land Conservation in Suzhou City[J].Journal of Natural Resources,2007,22(3):353-360.
Authors:SU Wei-zhong  YANG Gui-shan  GU Chao-lin
Institution:( 1.Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008, China; 2.Department of
Urban Planning, Tsinghua University, Beijing 100084, China)
Abstract:Under the background of globalization and informatization of the world economy, the rapid economic growth and process of urbanization in Suzhou city in future will aggravate the conservation pressure on cultivated land.It is time to consider and redefine the connotation of current cultivated land conservation concept. ( 1)Based on domestic and foreign related researches and the framework of PSR( Pressure-State-Response)model, this paper proposes the gradation evaluation indicator system of cultivated land conservation in Suzhou city among which the Pressure indicator is the environment pressure of cultivated land, and the State indicator is the soil quality and land fragmentation, and the Response indicator is per unit area yield of grain.( 2) Individual indicator evaluation results show that the environment pressure of cultivated land caused by rapid population and economic growth, urban sprawl and freeway networks infrastructure construction is very outstanding; the soil quality of cultivated land is very good, and the land is fertile; the fragmentation is evident because of the division of urban, transport land, lakes, rivers and highland terrain; the unit production ( 6683kg/ha) is higher than that of Jiangsu Province ( 5954kg/ha) and the whole country ( 4399kg/ha) .( 3) The correlative analysis of these individual indicators show that the correlative coefficient is very small, and the various relationships between indicators are performed according to different regional characteristics, and accordingly their weights are difficult to be defined.Based on the research result of correlative analysis of indicators, the paper adopts the Hierarchical Cluster Analysis method for the general gradation evaluation of cultivated land conservation.The results show that the ratio of the area of the 4 ranks is 33.6 ∶32.4 ∶26.7 ∶7.3.The cultivated land of rank S1 is located in the rural areas outside urbanization region and lake areas where four indicators are very good.The cultivated land of rank S2 is located in the Yanjiang plains and the urbanized marginal areas where the soil quality is good, and the level of food production is high.The cultivated land of rank S3 is scattered in the urbanized marginal area and lake-hilly areas where four indicators are common. The cultivated land of rank S4 is scattered in the areas around big cities and lakes hilly areas. ( 4) Then on the basis of regional characteristics and indicators relationships of each cultivated land conservation rank, the gradation system of the 4 ranks is subdivided into 9 ranks, and some conservation measures about cultivated land for each rank are also pointed out.
Keywords:cultivated land conversation  gradation evaluation  PSR model  Suzhou city
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