Mineralisation and Changes in the Fractions of Soil Organic Matter in Soils of the Permafrost Region, Qinghai‐Tibet Plateau, China
To determine the relationship between soil organic matter (SOM) decomposition and chemistry in the permafrost region of the Qinghai‐Tibet Plateau (QTP), 300‐day laboratory incubations at 25°C and chemical fractionation were performed to characterise the mineralisation dynamics of organic carbon from...
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Online Access: | https://doi.org/10.1002/ppp.1796 |
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ftrepec:oai:RePEc:wly:perpro:v:25:y:2014:i:1:p:35-44 2023-05-15T17:57:01+02:00 Mineralisation and Changes in the Fractions of Soil Organic Matter in Soils of the Permafrost Region, Qinghai‐Tibet Plateau, China Xiaodong Wu Hongbing Fang Lin Zhao Tonghua Wu Ren Li Zhengwei Ren Qiangqiang Pang Yongjian Ding https://doi.org/10.1002/ppp.1796 unknown https://doi.org/10.1002/ppp.1796 article ftrepec https://doi.org/10.1002/ppp.1796 2020-12-04T13:31:25Z To determine the relationship between soil organic matter (SOM) decomposition and chemistry in the permafrost region of the Qinghai‐Tibet Plateau (QTP), 300‐day laboratory incubations at 25°C and chemical fractionation were performed to characterise the mineralisation dynamics of organic carbon from soils under five vegetation conditions. The respiration rates in wet meadows were the highest, followed by the Kobresia pygmaea meadow and K. robusta meadow. After the incubation period, all four fractions of SOM – non‐polarity soluble, water soluble, holocellulose and lignin contents – showed some decline, and the SOM decreased by 16–20 per cent in soils of the steppe, meadow and wet meadow. These results suggest that a large proportion of the organic matter in soils of the permafrost region in the QTP is mineralisable. Based on the changes in chemical fractions of organic matter, it could be determined that soils with higher water‐soluble fractions had higher rates of carbon mineralisation, while the mechanisms involved in the respiration of different chemical fractions are complicated. Copyright © 2013 John Wiley & Sons, Ltd. Article in Journal/Newspaper permafrost RePEc (Research Papers in Economics) Permafrost and Periglacial Processes 25 1 35 44 |
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RePEc (Research Papers in Economics) |
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To determine the relationship between soil organic matter (SOM) decomposition and chemistry in the permafrost region of the Qinghai‐Tibet Plateau (QTP), 300‐day laboratory incubations at 25°C and chemical fractionation were performed to characterise the mineralisation dynamics of organic carbon from soils under five vegetation conditions. The respiration rates in wet meadows were the highest, followed by the Kobresia pygmaea meadow and K. robusta meadow. After the incubation period, all four fractions of SOM – non‐polarity soluble, water soluble, holocellulose and lignin contents – showed some decline, and the SOM decreased by 16–20 per cent in soils of the steppe, meadow and wet meadow. These results suggest that a large proportion of the organic matter in soils of the permafrost region in the QTP is mineralisable. Based on the changes in chemical fractions of organic matter, it could be determined that soils with higher water‐soluble fractions had higher rates of carbon mineralisation, while the mechanisms involved in the respiration of different chemical fractions are complicated. Copyright © 2013 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Xiaodong Wu Hongbing Fang Lin Zhao Tonghua Wu Ren Li Zhengwei Ren Qiangqiang Pang Yongjian Ding |
spellingShingle |
Xiaodong Wu Hongbing Fang Lin Zhao Tonghua Wu Ren Li Zhengwei Ren Qiangqiang Pang Yongjian Ding Mineralisation and Changes in the Fractions of Soil Organic Matter in Soils of the Permafrost Region, Qinghai‐Tibet Plateau, China |
author_facet |
Xiaodong Wu Hongbing Fang Lin Zhao Tonghua Wu Ren Li Zhengwei Ren Qiangqiang Pang Yongjian Ding |
author_sort |
Xiaodong Wu |
title |
Mineralisation and Changes in the Fractions of Soil Organic Matter in Soils of the Permafrost Region, Qinghai‐Tibet Plateau, China |
title_short |
Mineralisation and Changes in the Fractions of Soil Organic Matter in Soils of the Permafrost Region, Qinghai‐Tibet Plateau, China |
title_full |
Mineralisation and Changes in the Fractions of Soil Organic Matter in Soils of the Permafrost Region, Qinghai‐Tibet Plateau, China |
title_fullStr |
Mineralisation and Changes in the Fractions of Soil Organic Matter in Soils of the Permafrost Region, Qinghai‐Tibet Plateau, China |
title_full_unstemmed |
Mineralisation and Changes in the Fractions of Soil Organic Matter in Soils of the Permafrost Region, Qinghai‐Tibet Plateau, China |
title_sort |
mineralisation and changes in the fractions of soil organic matter in soils of the permafrost region, qinghai‐tibet plateau, china |
url |
https://doi.org/10.1002/ppp.1796 |
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permafrost |
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permafrost |
op_relation |
https://doi.org/10.1002/ppp.1796 |
op_doi |
https://doi.org/10.1002/ppp.1796 |
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Permafrost and Periglacial Processes |
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25 |
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35 |
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44 |
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