辽西北地区农牧交错带土地退化原因及其对土壤性状的影响

Reasons of Land Degradation and Its Effect on Soil Characteristics in the Inter-dstributingArea of Farming and Pasturing of northwestern Liaong Province

目前上地退化（荒漠化）问题倍受人们关注。辽西北地处我国北方农牧交错带和科尔沁沙地的南缘，土地退化十分普遍且较为严重。在影响土地退化的诸多因子中，人类不合理地利用土地是导致该地区土地退化重要原因。该地区退化的土地主要表现为三化：即土壤的贫瘠化、沙化、干旱化。

This paper takes Zhangwu County in the northwest area of Liaoning Province as an example to study thecause of land degradation and its effect on soil characteristics in the inter-distributing area of farming and pasturing.The results showed that the principal factors for land degradation in this area were unscientific and irrational landuse.And land degradation resulted in the soil oligotrophication, derertification and aridafication.