云南省土地退化的现状、原因及防治对策

Status of Land Degradation and Its Causes and Countermeasures in Yunnan Province

云南省退化土地的治理工作尽管取得了一定成绩,但由于各种复杂的自然和人为的原因,土地退化仍很严重,主要表现在山地灾害频繁发生、水土流失严重、土地受到严重污染等方面。更值得指出的是:据1999年遥感调查结果,全省水土流失面积达141333km2,占到全省土地面积的36.88%,平均侵蚀模数达到1340t/km2。对云南省的土地退化现状及其原因进行了概要分析,进而提出了土地退化的防治措施。

The land degradation in Yunnan Province is severe because of diverse and complex natural and human factors.The main expression is that large mounts of land hazard occur, the loss of water and soil is serious and the land is badly polluted.In particular, the area of water and soil loss reaches 141 333 km2 that accounts for 36.88 percent of the total area of Yunnan Province;the average erosion rate reaches 1 340 t/km2 in 1999.This paper analyses the current situation of land degradation and its causes and offers countermeasures for the decrease and prevention of land degradation.