耕地多功能权衡与协同关系研究——以上海市青浦区为例

为识别耕地各功能的关联程度及在不同空间上的相关关系,基于土地利用变更调查数据和统计年鉴等数据,利用冷热点分析和偏相关分析等方法对上海市青浦区耕地的生产功能、生态功能和景观功能进行空间定量化分析并划分五类功能区,识别各分区及整个区域的空间关联。结果表明:(1)耕地各功能空间分布差异显著,东部各功能状况较好,北部较差。(2)生产功能主导区主要分布在东北部,生态功能的主导区分布在东南部,景观功能主导区分布在西南部和北部,各功能的低值区集中在西北部,无显著功能区集中在淀山湖周围。(3)在整个区域内,生产-生态功能,生产-景观功能呈协同关系,生态-景观功能呈权衡关系,相关关系与各功能主导区具有差别。结论:耕地各功能之间存在显著的权衡与协同关系,并在不同功能主导区有一定差异。通过分析耕地多功能的空间分布差异和相关性能够有针对性的进行分区保护,从而实现耕地的可持续利用。

Study on Trade-off and Synergy Relationship of Cultivated Land Multifunction: A Case of Qingpu District,Shanghai

Affected by the development of society and economy and people's needs, the cognition of cultivated land function has gradually changed from single production function to a synthesis of production function,ecological function,landscape function,social function and other functions. The multifunctionality of cultivated land has become a research hot spot issue. Many studies have focused on the evaluation and analysis of a single function, which lack of links between different functions. To identify the association degree of various functions of cultivated land and the correlation in different spaces, based on land utilization alteration data and statistical yearbook data,using cold hot spot analysis and partial correlation analysis to quantitatively analyze the production function, ecological function and landscape function of cultivated land in Qingpu District, Shanghai and classify five dominant functional areas to identify spatial association of whole district and each dominant functional areas. The results showed that:(1) The spatial distribution of each function of cultivated land was significantly different. The distribution of production function and ecological function showed a trend of high in east and low in west,the landscape function was opposite,which was high in west and low in east. On the whole, the cultivated land multifunction was better in the east and the north was poor.(2)Advantage area of production function, ecological function and landscape function were mainly distributed in the northeast, southeast, southwest and north, the inferior areas of all functions were concentrated in the northwest,no significant functional areas centered around Dianshan Lake.(3)In the whole area, it showed a synergistic relationship in production-ecology function and production-landscape function,it had a trade-off relationship in ecology-landscape function,the correlation was obviously different in each dominant function area that compared with the whole area.The conclusion showed that: There were significant trade-offs and synergies relationship between the functions of cultivated land and some differences in each dominant functional region. By analyzing the spatial distribution differences and correlations of arable land various function, slowed down the trade-off relationship and enhanced the synergy relationship between multifunction and targeted protection can be carried out to achieve sustainable use of cultivated land.