Abstract:Due to serious soil and water loss, the ecosystem on the Loess Plateau is in a seriously degraded status. Discussion about the tendency of plant diversity change during the natural recovery process of vegetation in the studied area is very important both in theory and in practice. The studied area is located at Ziwuling in Fuxian county, Shaanxi province, China, at 109°11′E and 36°05′N. The climate is semi-arid in warm temperate zone with mean annual precipitation of 576.7mm and mean temperature of 9℃. It i...