The variation feature of soil inorganic carbon storage in alpine grassland in Qinghai province

The warm steppe, alpine steppe, alpine meadow steppe and alpine meadow are the main grassland types which widely distribute in Qinghai-Tibetan plateau. It's widely distribution and diverse development environments make it play an important role in the ecosystem: supporting regional economic development, guaranteeing water conservation of the plateau, maintaining biodiversity, fixation of carbon, etc. A quantitative survey of the variation feature of soil inorganic carbon (SIC) stored in warm steppe, alpine steppe, alpine meadow steppe and alpine meadow were carried out in Qinghai province. The SIC storage in the alpine meadow is very small and it mainly distributed in the south of Qinghai province. Warm steppe which has, the largest SIC storage mainly distributed nearby the Qinghai Lake. Climate change and human activity may affect the capacity and distribution of the carbon storage which would bring the ecological risk to the inorganic carbon fixation.