Soil Organic Carbon Mineralization and Its Temperature Sensitivity under Different Substrate Levels in the Mollisols of Northeast China
Soil organic carbon (SOC) mineralization plays an important role in global climate change. Temperature affects SOC mineralization, and its effect can be limited by the substrate available. However, knowledge of the effects of temperature and substrate quality on SOC mineralization in the Mollisols o...
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MDPI AG
2022-05-01
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| Online Access: | https://www.mdpi.com/2075-1729/12/5/712 |
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| author | He Yu Yueyu Sui Yimin Chen Tianli Bao Xiaoguang Jiao |
| author_facet | He Yu Yueyu Sui Yimin Chen Tianli Bao Xiaoguang Jiao |
| author_sort | He Yu |
| collection | DOAJ |
| description | Soil organic carbon (SOC) mineralization plays an important role in global climate change. Temperature affects SOC mineralization, and its effect can be limited by the substrate available. However, knowledge of the effects of temperature and substrate quality on SOC mineralization in the Mollisols of Northeast China is still lacking. In this study, based on a spatial transplant experiment, we conducted a 73-day incubation to examine the effects of temperature on SOC mineralization and its temperature sensitivity under different carbon levels. We found that the SOC content, incubation temperature and their interaction had significant effects on SOC mineralization. A higher SOC content and higher incubation temperature resulted in higher SOC mineralization. The temperature sensitivity of SOC mineralization was affected by the substrate quality. The temperature sensitivity of SOC mineralization, showed a downward trend during the incubation period, and the range of variation in the Q<sub>10</sub> declined with the increment in the SOC content. The study suggested that there was a higher SOC mineralization in high levels of substrate carbon when the temperature increased. Further, SOC mineralization under higher SOC contents was more sensitive to temperature changes. Our study provides vital information for SOC turnover and the CO<sub>2</sub> sequestration capacity under global warming in the Mollisols of Northeast China and other black soil regions of the world. |
| first_indexed | 2024-03-10T03:33:32Z |
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| institution | Directory Open Access Journal |
| issn | 2075-1729 |
| language | English |
| last_indexed | 2024-03-10T03:33:32Z |
| publishDate | 2022-05-01 |
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| spelling | doaj.art-2b96905da835453a8fd0d45142356e032023-11-23T11:50:21ZengMDPI AGLife2075-17292022-05-0112571210.3390/life12050712Soil Organic Carbon Mineralization and Its Temperature Sensitivity under Different Substrate Levels in the Mollisols of Northeast ChinaHe Yu0Yueyu Sui1Yimin Chen2Tianli Bao3Xiaoguang Jiao4Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region, College of Modern Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, ChinaKey Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, ChinaKey Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, ChinaHeilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region, College of Modern Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, ChinaHeilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region, College of Modern Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, ChinaSoil organic carbon (SOC) mineralization plays an important role in global climate change. Temperature affects SOC mineralization, and its effect can be limited by the substrate available. However, knowledge of the effects of temperature and substrate quality on SOC mineralization in the Mollisols of Northeast China is still lacking. In this study, based on a spatial transplant experiment, we conducted a 73-day incubation to examine the effects of temperature on SOC mineralization and its temperature sensitivity under different carbon levels. We found that the SOC content, incubation temperature and their interaction had significant effects on SOC mineralization. A higher SOC content and higher incubation temperature resulted in higher SOC mineralization. The temperature sensitivity of SOC mineralization was affected by the substrate quality. The temperature sensitivity of SOC mineralization, showed a downward trend during the incubation period, and the range of variation in the Q<sub>10</sub> declined with the increment in the SOC content. The study suggested that there was a higher SOC mineralization in high levels of substrate carbon when the temperature increased. Further, SOC mineralization under higher SOC contents was more sensitive to temperature changes. Our study provides vital information for SOC turnover and the CO<sub>2</sub> sequestration capacity under global warming in the Mollisols of Northeast China and other black soil regions of the world.https://www.mdpi.com/2075-1729/12/5/712substrate qualitycarbon dioxideKinetic theoryMollisolstemperature sensitivity |
| spellingShingle | He Yu Yueyu Sui Yimin Chen Tianli Bao Xiaoguang Jiao Soil Organic Carbon Mineralization and Its Temperature Sensitivity under Different Substrate Levels in the Mollisols of Northeast China Life substrate quality carbon dioxide Kinetic theory Mollisols temperature sensitivity |
| title | Soil Organic Carbon Mineralization and Its Temperature Sensitivity under Different Substrate Levels in the Mollisols of Northeast China |
| title_full | Soil Organic Carbon Mineralization and Its Temperature Sensitivity under Different Substrate Levels in the Mollisols of Northeast China |
| title_fullStr | Soil Organic Carbon Mineralization and Its Temperature Sensitivity under Different Substrate Levels in the Mollisols of Northeast China |
| title_full_unstemmed | Soil Organic Carbon Mineralization and Its Temperature Sensitivity under Different Substrate Levels in the Mollisols of Northeast China |
| title_short | Soil Organic Carbon Mineralization and Its Temperature Sensitivity under Different Substrate Levels in the Mollisols of Northeast China |
| title_sort | soil organic carbon mineralization and its temperature sensitivity under different substrate levels in the mollisols of northeast china |
| topic | substrate quality carbon dioxide Kinetic theory Mollisols temperature sensitivity |
| url | https://www.mdpi.com/2075-1729/12/5/712 |
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