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1·The organic matter and available potassium increased by a big margin will were vital question in the course of the fertility restoration of degenerated soil.

大幅度提高土壤有机质含量及供钾水平是退化土壤肥力恢复过程中面临的重要问题。

2·Soil erosion and soil degenerated by erosion is a main environmental problem in the world.

土壤侵蚀及其导致的土壤质量退化是世界性的重大环境问题之一。

3·Meanwhile, it shows that the reason of soil degenerated by erosion is the unreasonable use of land by comparing present situation of land utilization and its adaptability.

通过土壤资源的适宜性评价与土壤利用现状比较，指出土壤资源利用不合理是导致土壤侵蚀退化的根本原因。

4·Because of complicated function of natural and artificial factors, the quality and quantity of black soil decreased and degenerated heavily.

由于自然和人为因素的共同作用，黑土的质量发生了严重的退化，数量也急剧减少。

5·As the ion contents of the soil simulation solution doubled, the anodic dissolution of degenerated pearlite increases, and the local impedance of the electrode decreases.

模拟溶液各离子含量成倍增加后，退化珠光体的阳极电流密度升高，电化学交流阻抗值降低，局部腐蚀效应增大。

6·At the same time, aimed at the degenerated red soil, the different reasonable use models are put forward.

同时还针对退化红壤提出了不同的合理利用模式。

7·Soil microorganisms play a major role to soil ecosystem, however littele information is available about soil microorganisms of degenerated ecosystem.

土壤微生物在土壤生态系统中的作用重大，然而退化生态系统有关土壤微生物的研究相对缺乏。