东北三省生态占用动态变化分析

Dynamic Change of Ecological Appropriation in the Three North-Eastern Provinces

运用生态足迹方法中的不变产量法和可变产量法,考察了东北三省自1978年以来生态占用的动态变化。研究结果表明:东北三省生态占用呈上升趋势,生态环境压力持续增大,但土地单产的提高对于降低生态占用、减轻环境压力具有重要意义,可以有效地减缓生态占用快速上升的势头,但是林地的生产能力提高较慢。

The ecological appropriation values of the three north-eastern provinces are calculated with the constant yield method and variable yields method from 1978 to 2004 in the paper and the results were analyzed. The results showed that the ecological appropriation was increasing in the period, and the yields of all kind of lands play an important role in the course. The increase trend may slow down, but the yield of forest land increases little. It is a choke point.