贵州省耕地利用效率与经济发展的时空耦合关系

为探究贵州省耕地利用效率与经济发展的时空耦合关系,在已有研究的基础上,以喀斯特高原区——贵州省为研究对象,采用随机前沿生产函数模型计算研究区的耕地利用效率,并引入重心模型、地理联系率、地理集中度及耦合模型等方法揭示研究区耕地利用效率与经济发展的时空耦合关系。结果表明贵州省的耕地利用效率水平整体较高,实际产出与潜在产出之间存在的差异较小;研究期内耕地利用效率与经济发展之间存在着较高的耦合关系,时空分布一致性较强;耕地利用效率的提升能够有效促进区域经济的发展。

Temporal and Spatial Coupling Relationship between Cultivated Land Use Efficiency and Economic Development in Karst Plateau: A Case Study of Guizhou Province

In this paper, the progress of heavy saline-alkali soil greening in Tianjin Binhai New Area over the past 30 years was reviewed. Firstly, the formidable challenges faced by the heavy saline-alkali soil greening in Binhai New Area, such as severe saline environment, limited underground growth space and poor plant resources, were analyzed, and the coping strategies were elaborated. Subsequently, the special soil greening technologies of saline-alkali were introduced such as the "shallow closely spaced" subsurface drainage technology and related supporting technology, the development technology of suitable plant resources, and the precise control technology of water, fertilizer and salt in green space. In the end, the achievements of ecological greening of heavy salinealkali soil in Tianjin Binhai New Area were summarized. This will provide useful reference for urban ecological greening construction in saline-alkali areas in China.