Changes in land use are associated with the accumulation of soil phytolith-occluded organic carbon
Organic carbon occluded in phytoliths is extremely stable and plays important roles in long-term preservation of soil and stable carbon sequestration in terrestrial ecosystems. To clarify the effects of land-use changes on the accumulation of soil phytolith-occluded organic carbon (PhytOC), the typi...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Ecological Indicators |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X23004429 |
| _version_ | 1797823142117244928 |
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| author | Linjiao Wang Ke Wang Maoyin Sheng |
| author_facet | Linjiao Wang Ke Wang Maoyin Sheng |
| author_sort | Linjiao Wang |
| collection | DOAJ |
| description | Organic carbon occluded in phytoliths is extremely stable and plays important roles in long-term preservation of soil and stable carbon sequestration in terrestrial ecosystems. To clarify the effects of land-use changes on the accumulation of soil phytolith-occluded organic carbon (PhytOC), the typical six land-use types of forest, open forest, shrub, grassland, corn field and abandoned farmland in Southwest China were used to study the associations of soil PhytOC accumulation with land-use change. The present results showed that land-use changes significantly affected soil PhytOC accumulation and its proportion to TSOC (total soil organic carbon). Compared to vegetation coverage, vegetation productivity increased soil PhytOC accumulation more effectively. The content and reserves of soil PhytOC in the open forest all ranked highest among the six land uses studied. Forest thinning not only substantially increased soil stable organic carbon sequestration but also obviously increased the TSOC pool. When land use changed from forest to grassland, there were obvious releases or run off of soil organic carbon, but the stability of the soil organic C pool improved obviously. After the corn field was abandoned, the PhytOC pool did not vary obviously. Soil pH was the important factor influencing the soil PhytOC pool, and acidic soils were made against PhytOC accumulation in soils. Soil PhytOC accumulation was significantly affected by soil C, N and P nutrition contents and stoichiometric ratios. Significant negative effects of bulk density on PhytOC accumulation in soils were observed. The present results are of great significance in land use regulation for increasing the soil carbon sink of terrestrial ecosystems. |
| first_indexed | 2024-03-13T10:19:40Z |
| format | Article |
| id | doaj.art-4cbc26c9a9c7480f999347fbc54f1067 |
| institution | Directory Open Access Journal |
| issn | 1470-160X |
| language | English |
| last_indexed | 2024-03-13T10:19:40Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj.art-4cbc26c9a9c7480f999347fbc54f10672023-05-21T04:34:24ZengElsevierEcological Indicators1470-160X2023-07-01151110300Changes in land use are associated with the accumulation of soil phytolith-occluded organic carbonLinjiao Wang0Ke Wang1Maoyin Sheng2National Engineering Research Center for Karst Rocky Desertification Control, Guizhou Normal University, Guiyang 550001, ChinaGuizhou Engineering Laboratory for Karst Rocky Desertification Control and Derivative Industry, Guiyang 550001, ChinaNational Engineering Research Center for Karst Rocky Desertification Control, Guizhou Normal University, Guiyang 550001, China; Guizhou Engineering Laboratory for Karst Rocky Desertification Control and Derivative Industry, Guiyang 550001, China; Corresponding author at: National Engineering Research Center for Karst Rocky Desertification Control, Guizhou Normal University, Guiyang, No. 116, Baoshanbei Road, Guiyang 550001, China.Organic carbon occluded in phytoliths is extremely stable and plays important roles in long-term preservation of soil and stable carbon sequestration in terrestrial ecosystems. To clarify the effects of land-use changes on the accumulation of soil phytolith-occluded organic carbon (PhytOC), the typical six land-use types of forest, open forest, shrub, grassland, corn field and abandoned farmland in Southwest China were used to study the associations of soil PhytOC accumulation with land-use change. The present results showed that land-use changes significantly affected soil PhytOC accumulation and its proportion to TSOC (total soil organic carbon). Compared to vegetation coverage, vegetation productivity increased soil PhytOC accumulation more effectively. The content and reserves of soil PhytOC in the open forest all ranked highest among the six land uses studied. Forest thinning not only substantially increased soil stable organic carbon sequestration but also obviously increased the TSOC pool. When land use changed from forest to grassland, there were obvious releases or run off of soil organic carbon, but the stability of the soil organic C pool improved obviously. After the corn field was abandoned, the PhytOC pool did not vary obviously. Soil pH was the important factor influencing the soil PhytOC pool, and acidic soils were made against PhytOC accumulation in soils. Soil PhytOC accumulation was significantly affected by soil C, N and P nutrition contents and stoichiometric ratios. Significant negative effects of bulk density on PhytOC accumulation in soils were observed. The present results are of great significance in land use regulation for increasing the soil carbon sink of terrestrial ecosystems.http://www.sciencedirect.com/science/article/pii/S1470160X23004429PhytolithPhytOCC poolResponseKarst |
| spellingShingle | Linjiao Wang Ke Wang Maoyin Sheng Changes in land use are associated with the accumulation of soil phytolith-occluded organic carbon Ecological Indicators Phytolith PhytOC C pool Response Karst |
| title | Changes in land use are associated with the accumulation of soil phytolith-occluded organic carbon |
| title_full | Changes in land use are associated with the accumulation of soil phytolith-occluded organic carbon |
| title_fullStr | Changes in land use are associated with the accumulation of soil phytolith-occluded organic carbon |
| title_full_unstemmed | Changes in land use are associated with the accumulation of soil phytolith-occluded organic carbon |
| title_short | Changes in land use are associated with the accumulation of soil phytolith-occluded organic carbon |
| title_sort | changes in land use are associated with the accumulation of soil phytolith occluded organic carbon |
| topic | Phytolith PhytOC C pool Response Karst |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X23004429 |
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