土地退化概述青海地处青藏高原腹地,自然条件差,土地容量小,发展空间狭窄,是一个典型的干旱、半干旱省区。由于长期受气候变暖和人类活动的影响,造成湿地面积萎缩、风蚀面积增加、草原生态恶化、荒漠生态扩大、水土流失加剧、水旱灾害频发、损失逐年增大、生态灾民增多。土地的承载结构发生了变化,能流和物流出现失调,原始土地的生态系统严重退化。全省荒漠化土地面积占国 Overview of Land Degradation Qinghai is located in the hinterland of the Qinghai-Tibet Plateau. It is a typical arid and semi-arid provincial area with poor natural conditions, small land capacity and narrow development space. Due to the long-term impact of climate warming and human activities, the area of ​​wetlands is shrinking, the area of ​​wind erosion is increased, the ecological deterioration of grasslands, the expansion of desert ecology, and the erosion of soil and water are exacerbated. Floods and droughts frequently occur, losses increase year by year, and the number of ecological victims increases. The bearing structure of the land has changed, the energy flow and the logistics have been disrupted, and the ecosystem of the original land has seriously deteriorated. The province’s desertified land area accounted for the country