No changes in soil organic carbon and nitrogen following long-term prescribed burning and livestock exclusion in the Sudan-savanna woodlands of Burkina Faso
Fire and overgrazing reduce aboveground biomass, leading to land degradation and potential impacts on soil organic carbon (SOC) and total nitrogen (TN) dynamics. However, empirical data are lacking on how prescribed burning and livestock exclusion impact SOC in the long-term. Here we analyse the eff...
| Autores principales: | , , , , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2021
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/114637 |
| _version_ | 1855530620970598400 |
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| author | Aynekulu, Ermias Sileshi, Gudeta W. Rosenstock, Todd S. Noordwijk, Meinevan Tsegaye, Diress Koala, Jonas Sawadogo, Louis Milne, Eleanor Leeuw, Jan de Shepherd, Keith D. |
| author_browse | Aynekulu, Ermias Koala, Jonas Leeuw, Jan de Milne, Eleanor Noordwijk, Meinevan Rosenstock, Todd S. Sawadogo, Louis Shepherd, Keith D. Sileshi, Gudeta W. Tsegaye, Diress |
| author_facet | Aynekulu, Ermias Sileshi, Gudeta W. Rosenstock, Todd S. Noordwijk, Meinevan Tsegaye, Diress Koala, Jonas Sawadogo, Louis Milne, Eleanor Leeuw, Jan de Shepherd, Keith D. |
| author_sort | Aynekulu, Ermias |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Fire and overgrazing reduce aboveground biomass, leading to land degradation and potential impacts on soil organic carbon (SOC) and total nitrogen (TN) dynamics. However, empirical data are lacking on how prescribed burning and livestock exclusion impact SOC in the long-term. Here we analyse the effects of 19 years of prescribed annual burning and livestock exclusion on tree density, SOC and TN concentrations in the Sudanian savanna ecoregion at two sites (Tiogo and Laba) in Burkina Faso. Results revealed that neither livestock exclusion nor prescribed burning had significant impact on SOC and TN concentrations. The results at both sites indicate that 19 years of livestock and fire exclusion did not result in a significant increase in tree density compared to grazing and annual prescribed burning. The overall mean (± SEM) of SOC stocks in the 0–50 cm depth increment in the unburnt (53.5 ± 4.7 Mg C ha−1) and annually burnt (56.4 ± 4.3 Mg C ha−1) plots at Tiogo were not statistically different. Similarly, at Laba there was no significant difference between the corresponding figures in the unburnt (37.9 ± 2.6 Mg ha−1) and in the annually burnt plots (38.6 ± 1.9 Mg ha−1). Increases in belowground inputs from root turnover may have countered changes in aboveground biomass, resulting in no net change in SOC and TN. We conclude that, contrary to our expectation and current policy recommendations, restricting burning or grazing did not result in increase in SOC stocks in this dry savanna ecosystem. |
| format | Journal Article |
| id | CGSpace114637 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace1146372024-06-26T10:18:10Z No changes in soil organic carbon and nitrogen following long-term prescribed burning and livestock exclusion in the Sudan-savanna woodlands of Burkina Faso Aynekulu, Ermias Sileshi, Gudeta W. Rosenstock, Todd S. Noordwijk, Meinevan Tsegaye, Diress Koala, Jonas Sawadogo, Louis Milne, Eleanor Leeuw, Jan de Shepherd, Keith D. carbon nitrogen soil organic carbon Fire and overgrazing reduce aboveground biomass, leading to land degradation and potential impacts on soil organic carbon (SOC) and total nitrogen (TN) dynamics. However, empirical data are lacking on how prescribed burning and livestock exclusion impact SOC in the long-term. Here we analyse the effects of 19 years of prescribed annual burning and livestock exclusion on tree density, SOC and TN concentrations in the Sudanian savanna ecoregion at two sites (Tiogo and Laba) in Burkina Faso. Results revealed that neither livestock exclusion nor prescribed burning had significant impact on SOC and TN concentrations. The results at both sites indicate that 19 years of livestock and fire exclusion did not result in a significant increase in tree density compared to grazing and annual prescribed burning. The overall mean (± SEM) of SOC stocks in the 0–50 cm depth increment in the unburnt (53.5 ± 4.7 Mg C ha−1) and annually burnt (56.4 ± 4.3 Mg C ha−1) plots at Tiogo were not statistically different. Similarly, at Laba there was no significant difference between the corresponding figures in the unburnt (37.9 ± 2.6 Mg ha−1) and in the annually burnt plots (38.6 ± 1.9 Mg ha−1). Increases in belowground inputs from root turnover may have countered changes in aboveground biomass, resulting in no net change in SOC and TN. We conclude that, contrary to our expectation and current policy recommendations, restricting burning or grazing did not result in increase in SOC stocks in this dry savanna ecosystem. 2021-11 2021-08-16T05:17:26Z 2021-08-16T05:17:26Z Journal Article https://hdl.handle.net/10568/114637 en Open Access application/pdf Elsevier Aynekulu, Ermias; Sileshi, Gudeta W.; Rosenstock, Todd S.; Noordwijk, Meinevan; Tsegaye, Diress; Koala, Jonas; Sawadogo, Louis; Milne, Eleanor; Leeuw, Jande; Shepherd, Keith. 2021. No changes in soil organic carbon and nitrogen following long-term prescribed burning and livestock exclusion in the Sudan-savanna woodlands of Burkina Faso. Basic and applied ecology. 56(2021):165-175 https://doi.org/10.1016/j.baae.2021.07.007 |
| spellingShingle | carbon nitrogen soil organic carbon Aynekulu, Ermias Sileshi, Gudeta W. Rosenstock, Todd S. Noordwijk, Meinevan Tsegaye, Diress Koala, Jonas Sawadogo, Louis Milne, Eleanor Leeuw, Jan de Shepherd, Keith D. No changes in soil organic carbon and nitrogen following long-term prescribed burning and livestock exclusion in the Sudan-savanna woodlands of Burkina Faso |
| title | No changes in soil organic carbon and nitrogen following long-term prescribed burning and livestock exclusion in the Sudan-savanna woodlands of Burkina Faso |
| title_full | No changes in soil organic carbon and nitrogen following long-term prescribed burning and livestock exclusion in the Sudan-savanna woodlands of Burkina Faso |
| title_fullStr | No changes in soil organic carbon and nitrogen following long-term prescribed burning and livestock exclusion in the Sudan-savanna woodlands of Burkina Faso |
| title_full_unstemmed | No changes in soil organic carbon and nitrogen following long-term prescribed burning and livestock exclusion in the Sudan-savanna woodlands of Burkina Faso |
| title_short | No changes in soil organic carbon and nitrogen following long-term prescribed burning and livestock exclusion in the Sudan-savanna woodlands of Burkina Faso |
| title_sort | no changes in soil organic carbon and nitrogen following long term prescribed burning and livestock exclusion in the sudan savanna woodlands of burkina faso |
| topic | carbon nitrogen soil organic carbon |
| url | https://hdl.handle.net/10568/114637 |
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