大都市镇域耕地功能格局及其成因——以广州市为例

Functional Pattern of Cultivated Land and Its Cause in Metropolitan at the Sub-district Scale: A Case Study of Guangzhou

选取广州市为典型区域,运用土地利用图斑数据库及社会经济数据,通过熵权法评价分析了镇域尺度耕地功能的格局特征、区域关联及成因,结果表明:1)广州市耕地总功能呈现北部最强、南部次之、中部最弱的格局特征,各功能在空间分布上存在差异,功能间强度不一,受耕地资源丰度、地形及距市中心距离的影响较大;2)由于功能间存在关联,通过协调功能间关系、促进区域合作有助于实现有效的耕地多功能管理;3)耕地功能具备动态性,必须在不同阶段调整管理措施。此外,从统筹耕地开发管理、因地制宜发展耕地功能、加大优惠力度保障各方权益等方面探讨了耕地多功能管理政策。

Cultivated land is a kind of land-use type with a strong variability, and also a typical human-nature coupling system. The research on the functional pattern ofcultivated land and its causes can effectively promote the study of land use change. At present, functional diversityis a prominent feature of cultivated land use change in metropolis. Multifunctional cultivated land management is one of the main cultivated land management modes to meet the demands of urban and rural residents, is also important basis of cultivated land resource utilization and management. It isofgreat theoretical and practical significance for multifunctional cultivated land managementto study the functional pattern of cultivated land and its causes on micro-scale, because it can be more finely presents the cooperative or conflict relationamongcultivated land functions. As one of the metropolis in China, Guangzhou has a typical problem of cultivated land protection. The paper chose Guangzhou as the research area, used spackle-database about land use and socio-economic data to evaluate the functional pattern of cultivated land, regional linkage and its cause at the sub-district scale byusing the entropy method. On the basis of the value of cultivated land functions,Spearman rank correlation analysis was used to explore the relationship between functions. In accordance with the above process, three results can be obtained as follows： 1）The total function value of cultivated land mostlyrangesfrom0.301to0.400. It is obvious that cultivated land functionsas a whole areweak in Guangzhou.There are differences in spatial structure and intensity among functions of cultivated land. On the whole, the functional pattern of cultivated land in Guangzhou shows that the north is the strongest, followed by the south, and the central part is the weakest. These functions are affected by the abundance of cultivated land resource, the terrain and the distance from the city center. 2） According to the results ofSpearman rank correlation analysis, it is more performance for the collaborative relationshipamongfunctions. Because there is a strong relationship among functions, it can＆#39;t implement effective multifunctional cultivated land management through the optimization of a single function. However, harmonizing the relation and promoting regional cooperation can help to achieve it. 3） As its functionsaredynamic, the management measures must be adjusted in different stages. In general, the cultivated land functionshavea large room for improvement.To coordinate the relationship between functionsis not only a matter of concern for multifunctional cultivated land management, but also one of the important challenges to find the path of effective management. According to the current development situation and demand of Guangzhou, the paper discusses the policy of multifunctional cultivated land management from the aspects of coordinating the development and management of cultivated land, developing cultivated land functionsaccording to local conditions and giving more preference to protect the rights and interests of all parties. We need to rediscover the cultivated land, reconstruct the value of cultivated land functionsand find ways to achieve sustainable development of cultivated land, so as to protect the cultivated land, promote urban development and achieve social harmony.