基于生态足迹法的天水市土地整治效果研究

土地整治是盘活存量土地、强化节约集约用地、适时补充耕地和提升土地产量的重要手段，分析土地整治效果对土地整治项目的评价具有重要意义。本文运用生态足迹模型对2007-2012年间土地整治项目中的新增耕地的生态足迹及生态承载力进行了测算与评价。结果表明：1）2007年天水市土地整治后的新增耕地人均生态承载力为0.000 6 hm^2，占当年总的人均生态承载力0.648 4 hm^2的0.09%，占当年人均生态赤字1.074 4 hm^2 的0.05%。2011年新增耕地的人均生态承载力为0.001 2 hm^2，占当年总的人均生态承载力0.734 7 hm^2中的0.16%，占当年人均生态赤字1.118 4 hm^2的0.10%，若没有进行土地整治，天水市2011年生态赤字会增加0.10%。2）通过2007-2011年天水市人均新增耕地面积与其生态承载力的动态变化，可以发现，随着新增耕地面积的增多，人均生态承载力也相应变化，两者的关系呈现为正相关，一定程度上缓解了天水市的生态环境压力。 

LAND CONSOLIDATION EFFECT ANALYSIS BASED ON ECOLOGICAL FOOTPRINT METHOD IN TIANSHUI

Land consolidation is a vital means in activating existing lands, intensively saving lands, compensating farmlands and improving land production. Study on its effect is meaningful to evaluate land consolidation projects. This paper uses ecological footprint model to measure and evaluate the ecological footprint and carrying capacity of newly-added farmlands during 2007-2017 land consolidation project. The ecological carrying capacity per capita of newly-added farmland in Tianshui in 2007 is 0.0006 hm^2, amounting to 0.09% of the gross, also 0.05% of the ecological deficit. In 2017, the number is 0.0012 hm^2, 0.16% of the gross and 0.10% of the ecological deficit, which might be increased by 0.10% if no land consolidation. The interactive change between newly-added farmland per capita and ecological carrying capacity shows a positive relation that the ecological carrying capacity per capita rises with newly-added farm land, which may mitigate Tianshui's ecological environmental pressure to some extent.