Effect of dung quantity and quality on greenhouse gas fluxes from tropical pastures in Kenya
To improve estimates of agricultural greenhouse gas emissions in sub‐Saharan Africa, we measured over six individual periods of 25–29 days fluxes of methane (CH4), carbon dioxide (CO2), and nitrous oxide (N2O) with subdaily time resolution from dung patches of different quality (C/N ratio: 23–41) an...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
American Geophysical Union
2018
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/97702 |
| _version_ | 1855537950102650880 |
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| author | Yuhao Zhu Merbold, Lutz Pelster, David E. Díaz Pinés, Eugenio Wanyama, George N. Butterbach-Bahl, Klaus |
| author_browse | Butterbach-Bahl, Klaus Díaz Pinés, Eugenio Merbold, Lutz Pelster, David E. Wanyama, George N. Yuhao Zhu |
| author_facet | Yuhao Zhu Merbold, Lutz Pelster, David E. Díaz Pinés, Eugenio Wanyama, George N. Butterbach-Bahl, Klaus |
| author_sort | Yuhao Zhu |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | To improve estimates of agricultural greenhouse gas emissions in sub‐Saharan Africa, we measured over six individual periods of 25–29 days fluxes of methane (CH4), carbon dioxide (CO2), and nitrous oxide (N2O) with subdaily time resolution from dung patches of different quality (C/N ratio: 23–41) and quantity (0.5 and 1.0 kg) on a Kenyan rangeland during dry and wet seasons. Methane emissions peaked following dung application, whereas N2O and CO2 fluxes from dung patches were similar to fluxes from rangeland soils receiving no N additions. Greenhouse gas emissions scaled linearly with dung quantity during both seasons. Dung with a low (23) C/N ratio produced up to 10 times more CH4 than dung with a high (41) C/N ratio. Overall, CH4 emission factors (EFs) ranged from 0.001 to 0.042%, lower than those derived in temperate regions. Cumulative CO2 and N2O emissions were similar for all treatments across the different seasons. The N2O EF ranged from 0 to 0.01%, less than 1% of the Intergovernmental Panel on Climate Change Tier 1 default EF (2%) for N2O emissions from dung and urine patches, likely because of the low dung N content (9.7–16.5 g N kg−1 dry matter). However, these results were consistent with the updated cattle dung EF (0.2%) developed for Kenya in 2016/2017 (EF database ID# 422665). In view of the wide range of climates, soils, and management practices across sub‐Saharan Africa, development of robust GHG EFs from dung patches for SSA requires additional studies. |
| format | Journal Article |
| id | CGSpace97702 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | American Geophysical Union |
| publisherStr | American Geophysical Union |
| record_format | dspace |
| spelling | CGSpace977022025-09-29T06:20:47Z Effect of dung quantity and quality on greenhouse gas fluxes from tropical pastures in Kenya Yuhao Zhu Merbold, Lutz Pelster, David E. Díaz Pinés, Eugenio Wanyama, George N. Butterbach-Bahl, Klaus livestock environment greenhouse gases To improve estimates of agricultural greenhouse gas emissions in sub‐Saharan Africa, we measured over six individual periods of 25–29 days fluxes of methane (CH4), carbon dioxide (CO2), and nitrous oxide (N2O) with subdaily time resolution from dung patches of different quality (C/N ratio: 23–41) and quantity (0.5 and 1.0 kg) on a Kenyan rangeland during dry and wet seasons. Methane emissions peaked following dung application, whereas N2O and CO2 fluxes from dung patches were similar to fluxes from rangeland soils receiving no N additions. Greenhouse gas emissions scaled linearly with dung quantity during both seasons. Dung with a low (23) C/N ratio produced up to 10 times more CH4 than dung with a high (41) C/N ratio. Overall, CH4 emission factors (EFs) ranged from 0.001 to 0.042%, lower than those derived in temperate regions. Cumulative CO2 and N2O emissions were similar for all treatments across the different seasons. The N2O EF ranged from 0 to 0.01%, less than 1% of the Intergovernmental Panel on Climate Change Tier 1 default EF (2%) for N2O emissions from dung and urine patches, likely because of the low dung N content (9.7–16.5 g N kg−1 dry matter). However, these results were consistent with the updated cattle dung EF (0.2%) developed for Kenya in 2016/2017 (EF database ID# 422665). In view of the wide range of climates, soils, and management practices across sub‐Saharan Africa, development of robust GHG EFs from dung patches for SSA requires additional studies. 2018-10 2018-10-19T15:00:38Z 2018-10-19T15:00:38Z Journal Article https://hdl.handle.net/10568/97702 en Limited Access American Geophysical Union Zhu, Y., Merbold, L., Pelster, D., Diaz-Pines, E., Wanyama, G.N and Butterbach-Bahl, K. 2018. Effect of dung quantity and quality on greenhouse gas fluxes from tropical pastures in Kenya. Global Biogeochemical Cycles 32(10):1589-1604. |
| spellingShingle | livestock environment greenhouse gases Yuhao Zhu Merbold, Lutz Pelster, David E. Díaz Pinés, Eugenio Wanyama, George N. Butterbach-Bahl, Klaus Effect of dung quantity and quality on greenhouse gas fluxes from tropical pastures in Kenya |
| title | Effect of dung quantity and quality on greenhouse gas fluxes from tropical pastures in Kenya |
| title_full | Effect of dung quantity and quality on greenhouse gas fluxes from tropical pastures in Kenya |
| title_fullStr | Effect of dung quantity and quality on greenhouse gas fluxes from tropical pastures in Kenya |
| title_full_unstemmed | Effect of dung quantity and quality on greenhouse gas fluxes from tropical pastures in Kenya |
| title_short | Effect of dung quantity and quality on greenhouse gas fluxes from tropical pastures in Kenya |
| title_sort | effect of dung quantity and quality on greenhouse gas fluxes from tropical pastures in kenya |
| topic | livestock environment greenhouse gases |
| url | https://hdl.handle.net/10568/97702 |
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