The Loess Plateau in China is one of the key regions of soil erosion control and ecological environment construction. Vegetation net primary productivity (NPP) is an important indicator in evaluating the effectiveness of vegetation recovery and ecosystem management. Climate and land use change are the major components of global change, and also apparently affect the NPP. Currently, global climate change has become an indisputable fact, and the land use pattern in the Loess Plateau also has changed greatly s...