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Influence of soil properties on N₂O and CO₂ emissions from excreta deposited on tropical pastures in Kenya

Zhu, Yuhao; Merbold, Lutz; Leitner, Sonja; Xia, Longlong; Pelster, David E.; Diaz-Pines, Eugenio; Abwanda, Sheila; Mutuo, Paul M.; Butterbach-Bahl, Klaus

Abstract (englisch):
Urine and dung patches deposited by grazing cattle on grassland are an important source of nitrous oxide (N2O). While a number of studies have investigated the effects of excreta on soil N2O fluxes in developed economies and in China, observations in sub-Saharan Africa (SSA) are scarce. Moreover, the effects of soil properties (e.g. pH or texture) on N2O emissions from excreta patches have hardly been studied. In this study we investigated the importance of soil properties on N2O and carbon dioxide (CO2) emissions from cattle excreta (dung, urine, and manure [dung + urine]) for five typical tropical soils in Kenya. For this, intact soil cores were translocated from Western Kenya (Nandi county) to Nairobi, where N2O and CO2 fluxes were measured over four individual periods (two during dry seasons and two during wet seasons). Fluxes were measured for between 25 and 73 days following surface application of excreta, depending on how quickly emissions returned to baseline. Both dung and manure applications led to increased CO2 and N2O fluxes during both dry and wet seasons. On average, the N2O emission factor (EF) for manure was higher than for dung. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000100080
Veröffentlicht am 20.11.2019
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 01.2020
Sprache Englisch
Identifikator ISSN: 0038-0717
KITopen-ID: 1000100080
HGF-Programm 12.02.01 (POF III, LK 01)
Effects of land use and climate change
Erschienen in Soil biology & biochemistry
Band 140
Seiten Article No.107636
Vorab online veröffentlicht am 23.10.2019
Schlagwörter Soil properties; Excreta; N2O emission factor; Dung; Urine; Seasonality; Sub-Saharan Africa (SSA)
Nachgewiesen in Web of Science
Scopus
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