基于生态足迹模型的四川省耕地资源评价

Evaluation of Cultivated Land Resource in Sichuan Province Based on Ecological Footprint Model

耕地是所有生态生产性土地中生产力最大的一类,生态足迹模型是定量评价可持续发展的常用工具之一。基于传统生态足迹模型、改进生态足迹模型和EF-NPP模型,测算、分析了2006~2013年四川省耕地生态赤字等相关变化及趋势,客观评价了四川省耕地资源利用状况,并探讨了几种模型的差异。结果表明:2006~2013年间,四川省人均耕地生态足迹不断上升,人均耕地生态承载力基本稳定,人均耕地生态赤字持续扩大;耕地资源利用由弱不可持续状态逐步向强不可持续状态发展。3种生态足迹模型的对比研究发现,EF-NPP模型在一定程度上弥补了传统生态足迹模型和改进生态足迹模型的不足,客观、动态地反映了区域耕地利用状况和可持续发展状态。

Cultivated land has the largest productivity inallecologicallyproductive land-use types. The ecological footprint model is one of the commonly used tools for quantitative evaluation of sustainable development. This study analyzes the ecological deficit and the utilization state of cultivated land in Sichuan province from 2006 to 2013based on the traditional ecological footprint model, improved ecological footprint model and EF-NPP model. The differences of thosethree models are discussed. The results show that the per-capita ecological footprint of cultivated land keeps arising trend, and the per-capita ecological capacity is rather stable, which indicatesa sustained trend of expansion at per-capita ecological deficit in Sichuan province during 2006 to 2013. The status of cultivated land utilization is undergoing changes from weak-sustainable to strong-sustainable. Comparative studies of the three ecological footprint modelsshows that the EF-NPP model makes up for the deficiency of both the traditional ecological footprint model and the improved ecological footprint model. The EF-NPP modelis effective inreflecting the dynamic status of regional cultivated land use and sustainable development.