The influence and mechanism of temperature increase on soil carbon storage and its stability in Qinghai-Tibet high-cold grassland seisido is discussed.

The soil organic carbon storage of Qinghai-Tibet high cold grassland is huge, and under the climate warming scenario, the weak change of soil carbon storage has an important influence on the regional carbon source/sink function.
it is predicted that the warming of the Qinghai-Tibet Plateau is much higher than in other regions, and the scientific assessment of the impact of climate warming on the soil carbon storage of high-cold grasslands and its process mechanism has attracted wide attention from the government and the public.
he Nianpeng, Wen Xuefa, a researcher at the Institute of Geosciences and Resources of the Chinese Academy of Sciences, and his team, relying on the simulated temperature-raising experiment, vertical sample belt and horizontal sample belt across the Dangxiong ecological station, used the technical system of in situ control experiment and sample belt survey and indoor culture, and discussed the temperature increase on the soil soil carbon storage stability and its mechanism from the perspective of combining soil organic matter components, structure and temperature sensitivity.
using vertical and east-west horizontal bands, the researchers revealed spatial patterns of soil organic matter content and components, and quantitatively explored the mechanisms by which temperature and precipitation changes affected them.
relying on the simulated temperature-raising experimental platform of Dangxiong ecological experimental station, they quantitatively evaluated the effect of temperature increase on soil organic matter structure and stability, and found that the 6-year temperature increase had little effect on soil carbon storage, but reduced soil water-soluble organic carbon, non-reunion carbon and water-stable reuniting.
, climate warming may affect the carbon revenue and expenditure of the high-cold grasslands of Qinghai-Tibet by reducing the stability of soil organic structures and increasing the decomposition potential of the original soil organic matter;
, the researchers used the self-developed soil microbial respiratory continuous measurement system and the self-created "automatic temperature-changing culture and continuous automatic testing" new model, and found that soil organic matter decomposition temperature sensitivity (Q10) as a whole was characterized by high-cold meadows and high-cold grasslands and high-cold deserts.
interesting, when the daily dynamic temperature model was used to measure the soil respiration rate under indoor culture, it was found that there was a significant difference in the response of soil respiration to temperature change (warming phase vs. cooling stage), and Q10 showed that the heating stage was significantly lower than the cooling stage.
this provides a new perspective for better understanding of the effects of future temperature changes on soil respiration in the high-cold grasslands of Qinghai-Tibet, especially on temperature change asymmetry (day vs. night; spring vs. autumn).
study reveals the response of the soil organic matter components and their decomposition process to temperature changes in Qinghai-Tibet high-cold grassland, and provides some theoretical basis and data support for accurately assessing the carbon income and expenditure of Qinghai-Tibet high-cold grassland under the climate warming scenario.
research work has been supported by the National Science Foundation of China project national key research and development program and the Chinese Academy of Sciences Geography can outstanding young talent project.
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