生态承载力模型的改进及其应用

基于生态足迹模型中生态承载力和产量因子的定义，考虑到地区差异、科技进步和自然条件的影响，提出了一种计算生态承载力的新方法，并对甘肃省1997，1998年的人均生态承载力进行了实例分析，其中甘肃省1997，1998年人均生态承载力分别为0，8166014和0．8386695hm^2／人．结果表明甘肃省1998年生物生产土地的人均均衡面积与1997年相比有所增加，这与1997年的自然灾害比1998年严重的事实相吻合．1998年甘肃省生态承载力的增加主要是人均建筑均衡面积的增加造成的．通过比较得知，以前的研究结果存在高估甘肃省人均生态承载力水平的可能性．

Improvement of the ecological capacity model and its application

Considering the regional differences, the development of productivity and the changes in natural environment, a new approach of ecological capacity calculation was proposed based on the definitions of the ecological capacity and the yield factor of the ecological footprint, and its rationality was discussed through an analysis of the conditions in Gansu Province. The ecological capacities per capita of Gansu Province were 0.8166014 hm^2/cap in 1997 and 0.8386695 hm^2/cap in 1998, respectively. The results show that the yield adjusted equivalence area in 1997 was less than that in 1998, which may be due to the fact that the disasters occurred in 1997 were heavier than those in 1998. Compared with the former results, to substitute the yield factor of Gansu Province for the yield factor of China may overrate the per capita ecological capacity of Gansu Province.