[1]LIU Yang,LI Ju,SUN Hui,et al.Stability of Soil Organic Carbon Along the Altitudinal Gradient in Alpine of the West of Sichuan Province[J].Research of Soil and Water Conservation,2020,27(02):123-127,135.
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Stability of Soil Organic Carbon Along the Altitudinal Gradient in Alpine of the West of Sichuan Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 02
Page number:
123-127,135
Column:
Public date:
2020-03-30
- Title:
- Stability of Soil Organic Carbon Along the Altitudinal Gradient in Alpine of the West of Sichuan Province
- CLC:
- S153.6
- DOI:
- -
- Abstract:
- In order to explore the effect of soil organic carbon storage and stability on the source and sink of carbon in alpine ecosystems, soil samples were collected along the altitudinal gradients ranging from 3 400 m to 4 100 m in the western Sichuan Province, and organic carbon in these samples were fractionated according to a physio-chemical sequential extract method to evaluate changes in soil carbon stability at different elevations of alpine. The results showed that:(1)the soils along the alpine elevation gradient was dominated by coarse particles(0.25～2 mm), in the physical classification(>0.02 mm), the soil organic carbon content increased at first and then decreased with the increase of the altitude, that was, the soil organic carbon mainly existed in the form of particulate organic carbon; organic-inorganic carbon(carbon in organic-inorganic complex <0.02 mm)increased with altitude except at the highest altitude(4 100 m), the ratio of which was around 2% in total organic carbon and lower than that in lowland soil;(2)humus carbon was the major form of carbon in the organic-inorganic complex, and concent of humus also increased with altitude. Therefore, soil organic carbon of alpine was mainly sequestrated as liable organic carbon in the form of particulate organic carbon in western Sichuan Province, and organic carbon mineralization would be accelerated due to soil warming in the cold area of alpine in scenario of global climate change.
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Last Update:
2020-02-25