The Oasisization Process Promotes the Transformation of Soil Organic Carbon into Soil Inorganic Carbon
The dynamic fluctuations in the soil organic carbon (SOC) stock, a fundamental part of the terrestrial ecosystem’s carbon stock, are critical to preserving the global carbon balance. Oases in arid areas serve as critical interfaces between oasis ecosystems and deserts, with land use changes within t...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-03-01
|
| Series: | Land |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-445X/13/3/336 |
| _version_ | 1797240342615949312 |
|---|---|
| author | Junhu Tang Lu Gong Xinyu Ma Haiqiang Zhu Zhaolong Ding Yan Luo Han Zhang |
| author_facet | Junhu Tang Lu Gong Xinyu Ma Haiqiang Zhu Zhaolong Ding Yan Luo Han Zhang |
| author_sort | Junhu Tang |
| collection | DOAJ |
| description | The dynamic fluctuations in the soil organic carbon (SOC) stock, a fundamental part of the terrestrial ecosystem’s carbon stock, are critical to preserving the global carbon balance. Oases in arid areas serve as critical interfaces between oasis ecosystems and deserts, with land use changes within these oases being key factors affecting soil organic carbon turnover. However, the response of the soil SOC-CO<sub>2</sub>-SIC (soil inorganic carbon) micro-carbon cycle to oasis processes and their underlying mechanisms remains unclear. Five land-use types in the Alar reclamation area—cotton field (CF), orchard (OR), forest land (FL), waste land (WL), and sandy land (SL)—were chosen as this study’s research subjects. Using stable carbon isotope technology, the transformation process of SOC in the varieties of land-use types from 0 to 100 cm was quantitatively analyzed. The results showed the following: (1) The SOC of diverse land-use types decreased with the increase in soil depth. There were also significant differences in SIC-<i>δ</i><sup>13</sup>C values among the different land-use types. The PC(%) (0.73 g kg<sup>−1</sup>) of waste land was greatly higher than that of other land-use types (<i>p</i> < 0.05) (factor analysis of variance). (2) The CO<sub>2</sub> fixation in cotton fields, orchards, forest lands, and waste land primarily originates from soil respiration, whereas, in sandy lands, it predominantly derives from atmospheric sources. (3) The redundancy analysis (RDA) results display that the primary influencing factors in the transfer of SOC to SIC are soil water content, pH, and microbial biomass carbon. Our research demonstrates that changes in land use patterns, as influenced by oasis processes, exert a significant impact on the conversion from SOC to SIC. This finding holds substantial significance for ecological land use management practices and carbon sequestration predictions in arid regions, particularly in the context of climate change. |
| first_indexed | 2024-04-24T18:05:55Z |
| format | Article |
| id | doaj.art-5cef4c974a5f4af8941177b961e4fe75 |
| institution | Directory Open Access Journal |
| issn | 2073-445X |
| language | English |
| last_indexed | 2024-04-24T18:05:55Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Land |
| spelling | doaj.art-5cef4c974a5f4af8941177b961e4fe752024-03-27T13:50:42ZengMDPI AGLand2073-445X2024-03-0113333610.3390/land13030336The Oasisization Process Promotes the Transformation of Soil Organic Carbon into Soil Inorganic CarbonJunhu Tang0Lu Gong1Xinyu Ma2Haiqiang Zhu3Zhaolong Ding4Yan Luo5Han Zhang6College of Ecology and Environment, Xinjiang University, Urumqi 830017, ChinaCollege of Ecology and Environment, Xinjiang University, Urumqi 830017, ChinaCollege of Ecology and Environment, Xinjiang University, Urumqi 830017, ChinaCollege of Ecology and Environment, Xinjiang University, Urumqi 830017, ChinaCollege of Ecology and Environment, Xinjiang University, Urumqi 830017, ChinaCollege of Ecology and Environment, Xinjiang University, Urumqi 830017, ChinaCollege of Ecology and Environment, Xinjiang University, Urumqi 830017, ChinaThe dynamic fluctuations in the soil organic carbon (SOC) stock, a fundamental part of the terrestrial ecosystem’s carbon stock, are critical to preserving the global carbon balance. Oases in arid areas serve as critical interfaces between oasis ecosystems and deserts, with land use changes within these oases being key factors affecting soil organic carbon turnover. However, the response of the soil SOC-CO<sub>2</sub>-SIC (soil inorganic carbon) micro-carbon cycle to oasis processes and their underlying mechanisms remains unclear. Five land-use types in the Alar reclamation area—cotton field (CF), orchard (OR), forest land (FL), waste land (WL), and sandy land (SL)—were chosen as this study’s research subjects. Using stable carbon isotope technology, the transformation process of SOC in the varieties of land-use types from 0 to 100 cm was quantitatively analyzed. The results showed the following: (1) The SOC of diverse land-use types decreased with the increase in soil depth. There were also significant differences in SIC-<i>δ</i><sup>13</sup>C values among the different land-use types. The PC(%) (0.73 g kg<sup>−1</sup>) of waste land was greatly higher than that of other land-use types (<i>p</i> < 0.05) (factor analysis of variance). (2) The CO<sub>2</sub> fixation in cotton fields, orchards, forest lands, and waste land primarily originates from soil respiration, whereas, in sandy lands, it predominantly derives from atmospheric sources. (3) The redundancy analysis (RDA) results display that the primary influencing factors in the transfer of SOC to SIC are soil water content, pH, and microbial biomass carbon. Our research demonstrates that changes in land use patterns, as influenced by oasis processes, exert a significant impact on the conversion from SOC to SIC. This finding holds substantial significance for ecological land use management practices and carbon sequestration predictions in arid regions, particularly in the context of climate change.https://www.mdpi.com/2073-445X/13/3/336soil organic carbonsoil inorganic carbonoasis in arid areasstable carbon isotope technologycarbon sink |
| spellingShingle | Junhu Tang Lu Gong Xinyu Ma Haiqiang Zhu Zhaolong Ding Yan Luo Han Zhang The Oasisization Process Promotes the Transformation of Soil Organic Carbon into Soil Inorganic Carbon Land soil organic carbon soil inorganic carbon oasis in arid areas stable carbon isotope technology carbon sink |
| title | The Oasisization Process Promotes the Transformation of Soil Organic Carbon into Soil Inorganic Carbon |
| title_full | The Oasisization Process Promotes the Transformation of Soil Organic Carbon into Soil Inorganic Carbon |
| title_fullStr | The Oasisization Process Promotes the Transformation of Soil Organic Carbon into Soil Inorganic Carbon |
| title_full_unstemmed | The Oasisization Process Promotes the Transformation of Soil Organic Carbon into Soil Inorganic Carbon |
| title_short | The Oasisization Process Promotes the Transformation of Soil Organic Carbon into Soil Inorganic Carbon |
| title_sort | oasisization process promotes the transformation of soil organic carbon into soil inorganic carbon |
| topic | soil organic carbon soil inorganic carbon oasis in arid areas stable carbon isotope technology carbon sink |
| url | https://www.mdpi.com/2073-445X/13/3/336 |
| work_keys_str_mv | AT junhutang theoasisizationprocesspromotesthetransformationofsoilorganiccarbonintosoilinorganiccarbon AT lugong theoasisizationprocesspromotesthetransformationofsoilorganiccarbonintosoilinorganiccarbon AT xinyuma theoasisizationprocesspromotesthetransformationofsoilorganiccarbonintosoilinorganiccarbon AT haiqiangzhu theoasisizationprocesspromotesthetransformationofsoilorganiccarbonintosoilinorganiccarbon AT zhaolongding theoasisizationprocesspromotesthetransformationofsoilorganiccarbonintosoilinorganiccarbon AT yanluo theoasisizationprocesspromotesthetransformationofsoilorganiccarbonintosoilinorganiccarbon AT hanzhang theoasisizationprocesspromotesthetransformationofsoilorganiccarbonintosoilinorganiccarbon AT junhutang oasisizationprocesspromotesthetransformationofsoilorganiccarbonintosoilinorganiccarbon AT lugong oasisizationprocesspromotesthetransformationofsoilorganiccarbonintosoilinorganiccarbon AT xinyuma oasisizationprocesspromotesthetransformationofsoilorganiccarbonintosoilinorganiccarbon AT haiqiangzhu oasisizationprocesspromotesthetransformationofsoilorganiccarbonintosoilinorganiccarbon AT zhaolongding oasisizationprocesspromotesthetransformationofsoilorganiccarbonintosoilinorganiccarbon AT yanluo oasisizationprocesspromotesthetransformationofsoilorganiccarbonintosoilinorganiccarbon AT hanzhang oasisizationprocesspromotesthetransformationofsoilorganiccarbonintosoilinorganiccarbon |