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Effect of feeding practices and manure quality on CH$_{4}$ and N$_{2}$O 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

Abstract:
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 CH$_{4}$ and N$_{2}$O 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 N$_{2}$O emissions compared to cattle receiving sufficient feed but did not change EF$_{N2O}$. Sub-maintenance feeding did not affect cumulative manure CH$_{4}$ emissions or EF$_{CH4}$. When cattle were fed tropical forage grasses, cumulative manure N$_{2}$O emissions did not differ between diets, but manure EF$_{N2O}$ from Brachiaria and Rhodes diets were lower than the IPCC EF$_{N2O}$ for solid storage (1%, 2019 Refinement of IPCC Guidelines). Manure CH$_{4}$ emissions were lower in the Rhodes grass diet than when feeding Napier or Brachiaria, and manure EF$_{CH4}$ from all three grasses were lower than the IPCC default (4.4 g CH$_{4}$ kg$^{-1}$ VS, 2019 Refinement of IPCC Guidelines). ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000131130
Veröffentlicht am 08.04.2021
Originalveröffentlichung
DOI: 10.1016/j.wasman.2021.03.014
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung (IMK)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0956-053X, 1879-2456
KITopen-ID: 1000131130
Erschienen in Waste Management
Verlag Elsevier
Band 126
Seiten 209-220
Schlagwörter Solid storage; Napier; Rhodes; Brachiaria; Greenhouse gases; Sub-Saharan Africa
Nachgewiesen in Scopus
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