Effect of feeding practices and manure quality on CH4 and N2O emissions from uncovered cattle manure heaps in Kenya
Countries in sub-Saharan Africa (SSA) rely on IPCC emission factors (EF) for GHG emission reporting. However, these were derived for industrialized livestock farms and do not represent conditions of smallholder farms (small, low-producing livestock breeds, poor feed quality, feed scarcity). Here, we...
| 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/10568/113163 |
| _version_ | 1855520218094239744 |
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| author | Leitner, Sonja Ring, Dónal Wanyama, George N. Korir, Daniel Pelster, David E. Goopy, John P. Butterbach-Bahl, Klaus Merbold, Lutz |
| author_browse | Butterbach-Bahl, Klaus Goopy, John P. Korir, Daniel Leitner, Sonja Merbold, Lutz Pelster, David E. Ring, Dónal Wanyama, George N. |
| author_facet | Leitner, Sonja Ring, Dónal Wanyama, George N. Korir, Daniel Pelster, David E. Goopy, John P. Butterbach-Bahl, Klaus Merbold, Lutz |
| author_sort | Leitner, Sonja |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Countries in sub-Saharan Africa (SSA) rely on IPCC emission factors (EF) for GHG emission reporting. However, these were derived for industrialized livestock farms and do not represent conditions of smallholder farms (small, low-producing livestock breeds, poor feed quality, feed scarcity). Here, we present the first measurements of CH4 and N2O emissions from cattle-manure heaps representing feeding practices typical for smallholder farms in the highlands of East Africa: 1) cattle fed below maintenance energy requirements to represent feed scarcity, and 2) cattle fed tropical forage grasses (Napier, Rhodes, Brachiaria). Sub-maintenance feeding reduced cumulative manure N2O emissions compared to cattle receiving sufficient feed but did not change EFN2O. Sub-maintenance feeding did not affect cumulative manure CH4 emissions or EFCH4. When cattle were fed tropical forage grasses, cumulative manure N2O emissions did not differ between diets, but manure EFN2O from Brachiaria and Rhodes diets were lower than the IPCC EFN2O for solid storage (1%, 2019 Refinement of IPCC Guidelines). Manure CH4 emissions were lower in the Rhodes grass diet than when feeding Napier or Brachiaria, and manure EFCH4 from all three grasses were lower than the IPCC default (4.4 g CH4 kg−1 VS, 2019 Refinement of IPCC Guidelines). Regression analysis revealed that manure N concentration and C:N were important drivers of N2O emissions, with low N concentrations and high C:N reducing N2O emissions. Our results show that IPCC EFs overestimate excreta GHG emissions, which calls for additional measurements to develop localized EFs for smallholder livestock systems in SSA. |
| format | Journal Article |
| id | CGSpace113163 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace1131632025-12-08T09:54:28Z Effect of feeding practices and manure quality on CH4 and N2O emissions from uncovered cattle manure heaps in Kenya Leitner, Sonja Ring, Dónal Wanyama, George N. Korir, Daniel Pelster, David E. Goopy, John P. Butterbach-Bahl, Klaus Merbold, Lutz animal feeding forage crop residues livestock feeds cattle Countries in sub-Saharan Africa (SSA) rely on IPCC emission factors (EF) for GHG emission reporting. However, these were derived for industrialized livestock farms and do not represent conditions of smallholder farms (small, low-producing livestock breeds, poor feed quality, feed scarcity). Here, we present the first measurements of CH4 and N2O emissions from cattle-manure heaps representing feeding practices typical for smallholder farms in the highlands of East Africa: 1) cattle fed below maintenance energy requirements to represent feed scarcity, and 2) cattle fed tropical forage grasses (Napier, Rhodes, Brachiaria). Sub-maintenance feeding reduced cumulative manure N2O emissions compared to cattle receiving sufficient feed but did not change EFN2O. Sub-maintenance feeding did not affect cumulative manure CH4 emissions or EFCH4. When cattle were fed tropical forage grasses, cumulative manure N2O emissions did not differ between diets, but manure EFN2O from Brachiaria and Rhodes diets were lower than the IPCC EFN2O for solid storage (1%, 2019 Refinement of IPCC Guidelines). Manure CH4 emissions were lower in the Rhodes grass diet than when feeding Napier or Brachiaria, and manure EFCH4 from all three grasses were lower than the IPCC default (4.4 g CH4 kg−1 VS, 2019 Refinement of IPCC Guidelines). Regression analysis revealed that manure N concentration and C:N were important drivers of N2O emissions, with low N concentrations and high C:N reducing N2O emissions. Our results show that IPCC EFs overestimate excreta GHG emissions, which calls for additional measurements to develop localized EFs for smallholder livestock systems in SSA. 2021-05 2021-03-30T17:58:41Z 2021-03-30T17:58:41Z Journal Article https://hdl.handle.net/10568/113163 en Open Access Elsevier Leitner, S., Ring, D., Wanyama, G.N., Korir, D., Pelster, D.E., Goopy, J.P., Butterbach-Bahl, K. and Merbold, L. 2021. Effect of feeding practices and manure quality on CH4 and N2O emissions from uncovered cattle manure heaps in Kenya. Waste Management 126:209-220. |
| spellingShingle | animal feeding forage crop residues livestock feeds cattle Leitner, Sonja Ring, Dónal Wanyama, George N. Korir, Daniel Pelster, David E. Goopy, John P. Butterbach-Bahl, Klaus Merbold, Lutz Effect of feeding practices and manure quality on CH4 and N2O emissions from uncovered cattle manure heaps in Kenya |
| title | Effect of feeding practices and manure quality on CH4 and N2O emissions from uncovered cattle manure heaps in Kenya |
| title_full | Effect of feeding practices and manure quality on CH4 and N2O emissions from uncovered cattle manure heaps in Kenya |
| title_fullStr | Effect of feeding practices and manure quality on CH4 and N2O emissions from uncovered cattle manure heaps in Kenya |
| title_full_unstemmed | Effect of feeding practices and manure quality on CH4 and N2O emissions from uncovered cattle manure heaps in Kenya |
| title_short | Effect of feeding practices and manure quality on CH4 and N2O emissions from uncovered cattle manure heaps in Kenya |
| title_sort | effect of feeding practices and manure quality on ch4 and n2o emissions from uncovered cattle manure heaps in kenya |
| topic | animal feeding forage crop residues livestock feeds cattle |
| url | https://hdl.handle.net/10568/113163 |
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