Abstract:The hilly area of loess plateau is well known for its high erosion rate and sensitive to the global change for their vulnerable ecosystem. Vegetation is the main factor to improve the environment of soil erosion and water loss. The net primary production is the significant characteristic of ecosystem structure and function. The production of different vegetation types and plant species under various environmental conditions reflect their adaptability to Loess Plateau. In arid and semiarid ecosystem of Loe...